Is Your Car Running Hot but Not Overheating?

#driveyourlife

overheating gauge, car running hot but not overheatingHow often do you look at your temperature gauge?  If you are like most drivers, our guess would be almost never.  Most drivers look at their temperature gauge so rarely that many vehicle manufacturers don’t even include temperature gauges anymore but just lights that will come on if your car is either extremely cold or extremely hot.  However, if your car is running hot but not overheating, you might not know it without a gauge.

However, even if your vehicle has a temperature gauge it may not be telling you as much as you think.  Many factory temperature gauges are designed to read in the middle of the gauge over an extremely wide range of temperatures and may not tell you if you have a car running hot but not overheating.

If you’re looking for a quick and easy way to get an accurate reading of your coolant temperature, you may consider using a device that can read the exact temperature from your car’s coolant temperature sensor.  There are many options for tools can use but one of the most versatile is a BlueTooth OBD2 code reader and an app on your phone where you can read different values from each sensor, including the coolant temperature sensor.

If you find that you’ve got a car running hot but not overheating there might be a few reasons:

  • Clogged or damaged radiator
  • Low coolant level
  • Damaged water pump or thermostat
  • Overworked engine

Assuming your cooling system is working properly meaning it’s full of clean coolant and doesn’t have any damaged or clogged components, then it’s possible your cooling system just needs a little help to keep things at the right temperature.  To give your cooling system a boost, add BlueDevil Engine Cool to your coolant to give it that extra cooling capacity to keep your car from running hot.

You can find BlueDevil Engine Cool at any of our partnering local auto parts stores like:

  • AutoZone
  • Advance Auto Parts
  • Bennett Auto Supply
  • CarQuest Auto Parts
  • NAPA Auto Parts
  • O’Reilly Auto Parts
  • Pep Boys
  • Fast Track
  • Bumper to Bumper Auto Parts Specialists
  • S&E Quick Lube Distributor
  • DYK Automotive
  • Fisher Auto Parts stores
  • Auto Plus Auto Parts stores
  • Hovis Auto & Truck Supply stores
  • Salvo Auto Parts
  • Advantage Auto Stores
  • Genuine Auto Parts stores
  • Bond Auto Parts stores
  • Tidewater Fleet Supply
  • Bumper to Bumper Auto Parts
  • Any Part Auto Parts
  • Consumer Auto Parts

Pictures Provided By:

overheating_guage.jpg – By Allanswart – Licensed by Getty Images – Original Link

 

BlueDevil Products can be found on Amazon.com or at AutoZone, Advance Auto Parts, O’Reilly Auto Parts, NAPA, and other major auto parts retailers.

334 responses to "Is Your Car Running Hot but Not Overheating?"

334 Comments

  1. Will on January 25, 2019 at 1:44 pm

    What about this scenario: so far, this has only happened on an unseasonably warm day and a colder day, the day later. I was warming up my car like I normally do in cold weather, and I probably shouldn’t have done this on the warmer day (about 55). I was in house while car was warming up; heat was on, but not full blast. I came out about a half hour later and temp gage was ridiculously high, but not on “overheat”. As soon as I got into gear and started driving, it came down to normal and I had no issues the rest of the day, with a good amount of driving. The next day I did the same thing, although I only warmed up for about 10 minutes. Again, looks like gage was getting high. I had heat on full blast. Again, I drove car and temp gage came right down to normal. Before answering, please consider that I DO normally warm my car up in the winter for long periods of time and have never had this problem.

    • BlueDevil Pro on January 25, 2019 at 2:59 pm

      Will-

      Based on your description, the best place to start would be to check that the thermostat is functioning properly. You can test the thermostat yourself by placing it in boiling water and ensuring it is opening up at the correct temperature. Assuming your cooling system is working properly meaning it’s full of clean coolant and doesn’t have any damaged or clogged components, then it’s possible your cooling system just needs a little help to keep things at the right temperature. To give your cooling system a boost, add BlueDevil Engine Cool to your coolant to give it that extra cooling capacity to keep your car from running hot.

      Thank you!

      -BDP

      • Ambie on November 4, 2020 at 8:41 am

        I would also check to see if your radiator fan is working properly!

      • Lawrence on September 23, 2022 at 12:16 am

        Started to do this after I changed out my alternator red coolant light came up blinking on and off did my thermostat get stuck or am I low on coolant?

        • BlueDevil Pro on September 23, 2022 at 9:05 am

          Lawrence-

          Based on your description, it sounds like the system was low on coolant. Feel free to contact our technical support line at 888-863-0426 with any other questions.

          Thank you!

          -BDP

      • Linda on November 8, 2022 at 5:42 am

        Every thing has been changed out that could make a problem but the gage is still saying over heating on a 2005 Saturn Relay what can I do to fix it.

        • BlueDevil Pro on November 8, 2022 at 8:16 am

          Linda-

          Has a mechanic taken a look at the vehicle to properly diagnose it? What are the parts that you’ve already had replaced? Please contact our technical support line at 888-863-0426 so that we can get a little better understanding of the vehicle’s condition and be able to make any appropriate recommendations.

          Thank you!

          -BDP

      • Brenda on June 19, 2023 at 7:22 pm

        My pt cruiser will run hot but has water, we have checked several things. But found out most of the time when it got hot it would actually burn wires and I would have to have it required is this normal

        • BlueDevil Pro on June 20, 2023 at 9:20 am

          Brenda-

          Thank you for asking about your PT Cruiser. The first thing to check in this situation would be the thermostat. If the thermostat is sticking, it could cause the engine to run hot, without losing any water/coolant. If the thermostat is functioning properly, the next component to explore would be the water pump. The water pump is responsible for circulating water throughout the system. If circulation is being restricted, it could cause the engine to run hotter than normal.

          Thank you!

          -BDP

      • Monica Mcgrew on August 10, 2023 at 5:24 pm

        My car only get hot if I turn on my air then the engine get hot in my sontra

        • BlueDevil Pro on August 11, 2023 at 8:51 am

          Monica-

          If the issue is only arising when you put the a/c on, it’s possible the a/c would be the culprit for the engine starting to overheat. This could be due to low refrigerant levels or the a/c compressor failing to engage. This could also be due to a faulty fan clutch or issues with the radiator, so it may be best to have the problem diagnosed by a mechanic.

          Thank you!

          -BDP

          • Shayne Gossett on August 11, 2023 at 6:28 pm

            My truck is full of coolant now and running hot. 07 gmc cayon. Any ideas of why or what will work?



          • BlueDevil Pro on August 14, 2023 at 8:58 am

            Shayne-

            If you are unsure as to why your truck is running hot, it may be best to bring it in to your local mechanic for a proper diagnosis. A faulty thermostat, a faulty water pump and/or a faulty radiator could all cause the engine to start running hot without a loss of coolant.

            Thank you!

            -BDP



    • George Hronis on May 20, 2019 at 6:54 pm

      Cooling fans …check to see if they come on…….if not take connectors apart and make sure there clean and in good shape…..

      • Scott Davis on October 17, 2020 at 7:18 pm

        My car over heated but the temp Gague showed cold

        • BlueDevil Pro on October 19, 2020 at 8:47 am

          Scott-

          Is your vehicle losing any water/coolant or are you noticing any other symptoms? Please contact our technical support line at 888-863-0426 so that we can get a little better understanding of the vehicle’s condition and be able to make any appropriate recommendations.

          Thank you!

          -BDP

          • Carla on June 21, 2022 at 6:49 pm

            So what is wrong when my car 2016 Chevy Cruze well let’s say now it’s hot out my cold air is working great and gauge is normal middle but my fan isn’t coming on another deal it goes back and forth days or weeks at a time the other scenario is as soon as I start it the overheating displays on dash saying turn air off(without air on) and then the fan at this time when it happens is running non stop and the heat or air doesn’t work..it switches back and forth it’s frustrating



          • BlueDevil Pro on June 22, 2022 at 8:43 am

            Carla-

            Thank you for asking about your Chevy Cruze. Based on your description, it sounds as though you may be dealing with a bad relay switch and/or faulty thermostat. A bad relay switch would prevent the thermostat from sending the proper settings to the fan, causing it to run constantly. A faulty thermostat would explain the “turn air off” issue, without the a/c being on. Replacing the thermostat would be the best place to start. If the problem persists, we recommend bringing the vehicle in for inspection.

            Thank you!

            -BDP



          • Renate Stachura on February 20, 2023 at 9:53 pm

            I have a 230 SLK 1998 it ran great a couple of days ago a light came , low coolant . It started to run a little hot at first I thought thermostat than I opened the radiator cap couldn’t see any liquid, so should I get some coolant & put in, I don’t want to drive so please let me know what is the best option!! Thank you so much



          • BlueDevil Pro on February 21, 2023 at 9:01 am

            Renate-

            If the system appeared low on coolant, you would want to top the coolant off to bring it up to the proper level. Low coolant levels would explain why the engine started running hot. If the problem persists after filling with coolant, or you notice the coolant level is falling again, we’d recommend bringing the vehicle to your local shop for inspection.

            Thank you!

            -BDP



          • Meme on June 20, 2023 at 2:46 pm

            2005 chev impala my car runs hot but not overheating if I turn the air on or heat it doesn’t change what should I do



          • BlueDevil Pro on June 20, 2023 at 3:30 pm

            Meme-

            Thank you for asking about your Chevy Impala. Have you noticed a loss of water/coolant? When was the water pump last replaced? Please contact our technical support line at 888-863-0426 so that we can get a little better understanding of the vehicle’s condition and be able to make any appropriate recommendations.

            Thank you!

            -BDP



        • Bree on November 17, 2020 at 6:23 am

          Same here

          • BlueDevil Pro on November 17, 2020 at 8:30 am

            Bree-

            Feel free to contact our technical support line at 888-863-0426 with any questions.

            Thank you!

            -BDP



          • Kola oladapo on August 27, 2021 at 2:13 pm

            Hi,
            I have a Toyota sienna 2005 xle limited that I bought few months ago in Nigeria. It was previously used in the west coast of US. I am the second owner. The vehicle has done 207,000 kilometres. About 2 months after I bought it, I started to hear a kind of pinging or rattling sound when the engine is hot or used for about 40 minutes. You hear the sound only when you want to move or accelerate in a slow moving traffic. It’s not continuous. Only at the take off at every stop. I thought something was wrong with the cooling system but my coolant is ok. No leaks. The temperature gauge does not rise beyond the centre. The air conditioning is cooling well all the time even with the sound so loud. People have told that my thermostat may have been delaying in opening. Some mechanic also said my radiator or fan might be faulty. But the fans work. Some other mechanics said maybe my catalyst is partially blocked. Though the bank 1 of the catalyst is not there anymore. It’s been stolen. Just the pot is there. However, I have used computer to check my engine temperature after driving the vehicle with air conditioning for about 1 hour and it reads 89°C. Could you please offer any advice? I am far away in lagos Nigeria. In fact I have to park the vehicle because I don’t want any further damage



          • BlueDevil Pro on August 27, 2021 at 2:45 pm

            Kola-

            Thank you for asking about your Toyota Sienna. Based on your description, it doesn’t sound like the issue is cooling system related. Given the fact that you are not losing coolant, the temperature gauge does not indicate overheating and the temperature you provided would be normal operating temperature for your leak. Have you tried checking the engine oil? A pinging or a rattling sound could indicate low oil levels and certain metal components not getting the proper lubrication.

            Hope this helps!

            -BDP



        • Joe on January 23, 2021 at 10:09 am

          Your coolant temperature sensor is bad

        • Nikell Marcano on April 6, 2022 at 5:03 pm

          There’s a unit responsible for triggering the fans at a certain temperature, this unit also send a signal to you temperature gauge on the dash. If the unit is broken/malfunctioning it would read as low on the gauge and not trigger on the fans which causes the overheating issue.

      • Roland Myers on July 18, 2021 at 2:10 pm

        What if they come on at first it was a fuse fuse was replaced fans working oil is good coolant is goos but from were radiature hose connects to engine looks like high heat made metal hook up look burnt
        Temp gauge reads constant rite in middle half way but I no engine temp is high im thinking thermostat or clogged some were

    • Robert cruz on August 15, 2019 at 4:26 am

      Why is my car overheating, it only overheats when the oil coolant sensor is on, as soon as I take it off the car runs perfect without any issues no smoke or anything( i take the negative charge off the battery allow the computer to reset and the car is brand new again). It also jerks and stalls when the sensor on ?

      • BlueDevil Pro on August 15, 2019 at 11:18 am

        Robert-

        Based on your description, we would recommend replacing the oil coolant sensor. It’s possible that a faulty sensor would send incorrect information to the vehicle’s computer system and affect engine performance. Based on the vehicle running normally with the sensor removed, a faulty sensor is likely the culprit for your issues.

        Thank you!

        -BDP

        • MUHAMMAD HARITH AQIL BIN BAHARUDIN on June 11, 2020 at 6:10 am

          why does my car temperature goes up after i drive over certain speed?

          • BlueDevil Pro on June 12, 2020 at 9:42 am

            Muhammad-

            Does the needle start to come back down after a little while or does it rise and stay there and starts to go towards overheating? Please contact our technical support line at 888-863-0426 so that we can get a little better understanding of the vehicle’s condition and be able to make any appropriate recommendations.

            Thank you!

            -BDP



          • Chanel on September 18, 2020 at 6:35 am

            My 2012 Impala goes to red (H) when I drive a certain speed and also within 15-20 minutes of driving. My coolant was recently put in at jiffy lube two months ago. My car says overheating idle engine but there is no smoke or anything . The fan normally stays running even when i got my car off but it’s not doing that. The engine light also comes on. What’s wrong with my car?



          • BlueDevil Pro on September 18, 2020 at 9:14 am

            Chanel-

            Thank you for asking about your Chevy Impala. Have you noticed a loss of coolant or had to add any coolant while this was occurring? If not, it’s possible the thermostat is faulty and not opening up at the proper temperature. If you have not done so already, try replacing the thermostat to see if that corrects the issue.

            Thank you!

            -BDP



          • Renee on October 15, 2020 at 2:42 pm

            This is what my 2014 Chevy Malibu is doing



          • BlueDevil Pro on October 16, 2020 at 8:35 am

            Renee-

            Please contact our technical support line at 888-863-0426 so that we can get a better understanding of your vehicle’s condition and be able to make any appropriate recommendations.

            Thank you!

            -BDP



          • Edison on November 2, 2020 at 12:06 am

            The temperature gauge in my car goes above normal when I put on the AC….



          • BlueDevil Pro on November 2, 2020 at 9:56 am

            Edison-

            Does the needle go over to the red zone, indicating overheating, or is it just fluctuating a little? Please contact our technical support line at 888-863-0426 so we can get a little better understanding of your vehicle’s condition and be able to make any appropriate recommendations.

            Thank you!

            -BDP



        • Dese on February 23, 2021 at 7:23 pm

          Soy car was overheating at first so got it taken to the shop and they put a liquid which was the blue devil for engine crack sealing. For the first week weeks my car was good nothing is wrong take note as well my car doesn’t have the thermostat it got taken off because it was letting the hot come out this one guy said and he said it was fine to drive like that also now my check engine light is on but then a few weeks past and It’s overheating again but I don’t smell anything but I still pulled over and let it cool off I’m not sure anymore of what’s wrong with it

          • BlueDevil Pro on February 24, 2021 at 11:14 am

            Dese-

            Were you noticing a loss of water/coolant? Please contact our technical support line at 888-863-0426 so that we can get a little better understanding of the vehicle’s condition and be able to make any appropriate recommendations.

            Thank you!

            -BDP



      • Kaya s on December 16, 2020 at 10:39 pm

        My vehicle coolant is reducing every time I drive my car, but I can’t see leaks and the vehicle is not overheating. What could be the problem?

        • BlueDevil Pro on December 17, 2020 at 8:06 am

          Kaya-

          How quickly are you losing coolant? Is the low coolant indicator coming on or are there any other indicator lights popping up on the dash? Please contact our technical support line at 888-863-0426 so that we can get a little better understanding of the vehicle’s condition and be able to make any appropriate recommendations.

          Thank you!

          -BDP

        • Elnora Hicks on July 8, 2021 at 11:11 pm

          I have a 2009 GMC Acadia and the temperature gauge says the engine is overheating about about 10 minutes but, the engine isn’t hot and the fans come on. I got the temperature sensor replaced but, it’s still doing the same thing. Should I replace the thermostat also.

          • BlueDevil Pro on July 9, 2021 at 8:19 am

            Elnora-

            Thank you for asking about your GMC Acadia. Based on your description, replacing the thermostat would be the next logical step. You can also test the thermostat yourself by placing it in boiling water and see if it is opening up at the proper temperature. If it does not, this would be an indication the thermostat is faulty and needs to be replaced.

            Thank you!

            -BDP



    • Sun on June 1, 2020 at 5:22 pm

      I having a problem with my temperature gauge, I got the water pump done, ac compressor changed, sensor, thermostat, and a flush within 3 months , it’s going pass half, my fans are running, not sure what the next step, it happens when I drive, I dont go to far, fear that it will really go towards hot, it’s going pass the half mark now, only when I’m driving a few miles, I really don’t go anywhere to work and back home, but when driving somewhere a little farther it goes pass half, but not over to the hell side lolol

      • BlueDevil Pro on June 2, 2020 at 11:06 am

        Sun-

        Have you noticed any kind of pressure building up within the system? Are you seeing a bubbling/boiling over of coolant in the reservoir? Please contact our technical support line at 888-863-0426 so that we can get a little better understanding of the vehicle’s condition and be able to make any appropriate recommendations.

        Thank you!

        -BDP

        • Abba on June 7, 2020 at 11:30 am

          hello, i notice my ford escape 2003 always build up within the system and also see and hear bubbling/boiling over of coolant in the reservoir. but it does not show on the guage.

          • BlueDevil Pro on June 8, 2020 at 12:11 pm

            Abba-

            Thank you for asking about your Ford Escape. It’s possible that you are getting combustion/exhaust gases pumping back into the cooling system. You can use a “Block Dye Tester” to confirm whether or not that is the case.
            BlueDevil Head Gasket Sealer will still work if your vehicle is getting combustion/exhaust gases blowing into the cooling system and creating pressure. To give yourself the best overall chance of BlueDevil working successfully, in addition to the directions, you should remove the spark plug from the cylinder with the leak; this will be the spark plug from the cylinder with the low compression reading. If you are not sure which one that is, you may pull all of the spark plugs and will notice one will have a white-crystal-like substance on it and/or may look dirty; this is the plug you should pull. Leave that plug out for the 50 minute idle in order to relieve the pressure from building up and thus allowing the product to seal properly. Be sure to follow the guidelines for the proper amount to use based on the size of your cooling system.

            Thank you!

            -BDP



      • Cla on December 13, 2020 at 5:04 am

        I put water in mine and it stopped

    • Jacittia on October 27, 2020 at 8:01 pm

      My car has had a problem overheating but now it’s running perfect but still says it’s dangerously overheating. But fans are working no bubbling sound and no smell. I have recently changed the sensors and new thermostat so I don’t know what’s going on.

      • BlueDevil Pro on October 28, 2020 at 8:28 am

        Jacittia-

        When is the last time the water pump was replaced? Have you noticed if the vehicle is losing water/coolant? Please contact our technical support line at 888-863-0426 so that we can get a little better understanding of the vehicle’s condition and be able to make any appropriate recommendations.

        Thank you!

        -BDP

    • M7 on March 4, 2022 at 1:59 am

      I have a 2000 grand Cherokee and my radiator fan won’t start. I replace the module under passenger headlight . Water pump, thermostat, sensors and fan still won’t turn on any ideas ?

      • BlueDevil Pro on March 4, 2022 at 8:20 am

        M7-

        Thank you for asking about your Grand Cherokee. The most common reasons the fan won’t kick on is a blown fuse or a bad relay. It could also be caused by a faulty temp sensor or low coolant levels. It sounds as though you’ve replaced the temp sensor already, so if the coolant level appears to be normal, you may want to check the wiring.

        Hope this helps!

        -BDP

    • Christian on August 10, 2022 at 7:51 pm

      the only thing I can think of bro is that your thermostat is starting to stick so once it starts sticking it’s not going to open as much and the coolant system is not going to circulate as well and when you’re running it are you running the heater cuz if you run a heater that will take heat away from your coolant system cuz it’s basically a mini radiator for your heater core

  2. Pamela McDaniel on March 28, 2019 at 2:18 pm

    Car isn’t overheating at all but the temperature hand goes all the way to hot,what is the problem and how can I solve it

    • BlueDevil Pro on March 28, 2019 at 3:45 pm

      Pamela-

      If the temperature hand is going to the H indicator on the temperature guage, it would indicate overheating. Is the vehicle losing water/coolant? Please contact our technical support line at 888-863-0426 so that we can get a little better understanding of the vehicle’s condition and be able to make any appropriate recommendations.

      Thank you!

      -BDP

    • Randi on May 7, 2020 at 5:29 pm

      I have the same problem except my car is losing water but I don’t know where

      • BlueDevil Pro on May 8, 2020 at 1:31 pm

        Randi-

        If you are not sure where the leak is coming from, it may be best to have the vehicle diagnosed by a certified ASE mechanic.

        Thank you!

        -BDP

    • Cheryl vigliotti on November 13, 2020 at 11:34 am

      I have same problem my gauge goes from cold to hot after driver it a shot distants, maybe 4 miles.. before this happened a heard a sqeeling sound for a couple of days prior like a pulley, 1 day a drove it and it went to the red when I pulled into my garage smoke poured out alot. Now I can’t drive it but 4 miles and it goes to red quickly even on a cold day. We changed the t-stat but still doing the same thing

      • BlueDevil Pro on November 13, 2020 at 1:39 pm

        Cheryl-

        Based on your description, we recommend taking the vehicle to a certified ASE mechanic for a proper diagnosis. Unfortunately, a vehicle can develop an overheating issue for a number of different reasons, and for it to be overheating within a short distance, could indicate a major problem.

        Thank you!

        -BDP

        • Dalena on June 15, 2021 at 6:00 pm

          I’ve got a 2003 Aztec that the temperature gauge is going to the hot zone in seconds. Just replaced the thermostat and coolant. Never had a problem with it before. It’s not overheating or having any smoke or leakage. Just the gauge goes from cold to extremely hot just going around the block. It’s been suggested the coolant temperature sensor might be causing this to happen. It also doesn’t throw out any heat. Air’s blowing just not getting any hot air from it. AC works great. Any ideas?

          • BlueDevil Pro on June 16, 2021 at 8:19 am

            Dalena-

            Thank you for asking about your Pontiac Aztec. Other than a faulty coolant temperature sensor, another possibility for your issue is that an air is trapped in the system and causing an air pocket. The air pocket is restricting circulation and forcing the vehicle to overheat rapidly. This would also explain the lack of hot air blowing out when the heater is on, as coolant may not be able to flow through the heater core to give you proper heat. We recommend bleeding the system first to remove any potential air pockets. If that does fix the issue, you may want to bring the vehicle in for a proper diagnosis.

            Thank you!

            -BDP



        • Stacee Rasner on November 23, 2022 at 4:23 pm

          I am having the same problem, except it only happens sometimes. Sometimes I can drive it for severely miles and the temp is fine, then all of a sudden the gauge shoots up to hot withing a few seconds. I’ve all ready changed the thermostat that was stick open. And it seems like it’s losing water, but I have no idea where, because it’s not showing any signs of leaking. I have an 04 Honda Civic.

          • BlueDevil Pro on November 28, 2022 at 9:47 am

            Stacee-

            Thank you for asking about your Honda Civic. Have you noticed any smoke/steam coming out of the exhaust pipe? Based on your description, it may be best to have the vehicle inspected by your mechanic. This way, you can possibly prevent any further damage.

            Thank you!

            -BDP



  3. alexus on April 16, 2019 at 7:24 pm

    whenever i sit in traffic or a long drive thru line my car begins to overheat. when i drive off it goes back down but when i turned my car off it started smoking. what could possibly be the issue?

    • BlueDevil Pro on April 17, 2019 at 8:53 am

      Alexus-

      Where was the white smoke coming from? Have you noticed a loss of water/coolant? Please contact our technical support line at 888-863-0426 so that we can get a little better understanding of the vehicle’s condition and be able to make any appropriate recommendations.

      Thank you!

      -BDP

    • Max on October 7, 2020 at 1:00 pm

      This sounds like the Fans are not working. Most newer cars use electric fans that are triggered by a thermostat to cool the engine when you aren’t moving down the road.

      Hopefully the “smoke” you are describing is steam from the radiator. Was it at the from to the car?

  4. Mike on May 5, 2019 at 12:34 pm

    My car warms up fine. After a short drive in the city, tempreture will go up close to the red and then within seconds it will drop back down to normal. It does this every 10 minute or so. When I drive on the freeway its never does this only driving in city. I’m thinking of changing the thermostat and then flushing the radiator? Thoughts?

    • BlueDevil Pro on May 6, 2019 at 8:59 am

      Mike-

      Based on your description, it does sound like you are having an issue with flow, although intermittent. Checking the thermostat and flushing the cooling system would be a great place to start. A faulty thermostat and/or a contaminated cooling system could restrict circulation and cause the temperature to rise. If doing those two things doesn’t correct the issue, another component to consider would be the water pump.

      Hope this helps!

      -BDP

      • Jessica marie Rainer on August 20, 2021 at 12:39 pm

        I have a 2013 dodge grand caravan. I noticed yesterday the temperature gage was a little high. I checked coolant. It was full and no leaks. Today it was doing the same thing but when I was going over 50mph it was going closer to the H. But when I slowed down it went down but not to normal

        • BlueDevil Pro on August 23, 2021 at 8:17 am

          Jessica-

          Thank you for asking about your Dodge Grand Caravan. Based on your description, the best place to start would be to check that thermostat is functioning properly. A faulty thermostat could cause the engine to start overheating if it is not opening at the proper temperature. You can check the thermostat by placing it in boiling water and make sure it is opening up.
          Depending on the mileage, another thing to consider would be doing a cooling system flush. Most vehicle manufacturers recommend flushing the cooling system at regular service intervals as part of the routine maintenance on the vehicle. If the problem persists, it may be time to take the vehicle in for inspection.

          Thank you!

          -BDP

    • George Hronis on May 20, 2019 at 6:58 pm

      Make sure coolant level is good……..if it’s cold out and you lose heat while idling and get heat back when your moving check fluid level……cheapest fix…

  5. Audree on May 6, 2019 at 7:37 am

    My car has been losing coolant lately. The temp hand is slightly higher than usual sitting on 1/2. Usually it’s a little below that. I can’t drive it for 10 minutes before it starts steaming from under the hood because of the loss of coolant. All the time this is going on the temp hand remains at 1/2. Any ideas on what this may be?

    • BlueDevil Pro on May 6, 2019 at 9:26 am

      Audree-

      How quickly are you losing coolant? Typically, the temperature hand reading at the 1/2 way mark doesn’t indicate overheating and in most vehicles, actually indicates normal operating temperature. Please contact our technical support line at 888-863-0426 so that we can get a little better understanding of the vehicle’s condition and be able to make any appropriate recommendations.

      Thank you!

      -BDP

  6. T. Childers on May 7, 2019 at 10:56 am

    Our radiator had a blow up in December. It got hot and spewed on the engine. We took it to a mechanic and he flushed it and refilled it. He said the coolant was like “tang” (drink). A week later we had issues with the heaert not getting hot and took it back. He fixed it and everything seemed fine. The temperature gauge then began reading at the 2/3 mark and it never went past 1/2 before. We took the vehicle to another mechanic and they flushed it again and said it was fine. Now 2 months later we are still having it read at the 2/3 mark when we have driven about 45 min and then park. After parking it will go to the 3/4 mark and back to half in a matter of 2 minutes. While driving, city and highway miles, it stays at the 1/2 mark. It USUALLY only reads a hotter temperature when we have driven for a while and then park it. The engine does not feel hot when I lift up the hood. I don’t know what to do! We are going on vacation in a month and want to be sure it will be ok. Can you help?

    • BlueDevil Pro on May 7, 2019 at 11:17 am

      T. Childers-

      Have you noticed a loss of water/coolant? Based on your description, it is also possible that you are getting combustion/exhaust gases pumping back into the cooling system. You can use a “Block Dye Tester” to confirm whether or not that is the case.
      BlueDevil Head Gasket Sealer would still work if your vehicle is getting combustion/exhaust gases blowing into the cooling system and creating pressure. To give yourself the best overall chance of BlueDevil working successfully, in addition to the directions, you should remove the spark plug from the cylinder with the leak; this will be the spark plug from the cylinder with the low compression reading. If you are not sure which one that is, you may pull all of the spark plugs and will notice one will have a white-crystal-like substance on it and/or may look dirty; this is the plug you should pull. Leave that plug out for the 50 minute idle in order to relieve the pressure from building up and thus allowing the product to seal properly. Be sure to follow the guidelines for the proper amount to use based on the size of your cooling system.

      Thank you!

      -BDP

      • T. Childers on May 8, 2019 at 11:17 am

        Thank you for the reply! There has not been loss of water/coolant since we first had it fixed. I will try your suggestions. Thank you so much!

  7. Evan on May 12, 2019 at 5:48 pm

    My car does not have any leaks and full on coolant. After driving for about 45min to a hour while on the highway most of the time, the temperature gauge start to show the temperature go up but only 1 bar nothing to bad or to hot but when i put it in neutral and rev my engine just a little it will go down. But 20-40min later it will do it again. I all ready had the water pump replace and radiator cap replace about 5 months ago and it just started happening last couple of weeks.

    • BlueDevil Pro on May 13, 2019 at 10:01 am

      Evan-

      Based on your description, it is possible that you are dealing with a slight restriction in the cooling system, causing the temp gauge to fluctuate. If you have not done so already, try checking the thermostat to make sure it is opening up at the correct temperature. You can place the thermostat in boiling water to make sure it will open up. If the thermostat seems fine, a cooling system flush would be the next recommendation. Feel free to contact our technical support line at 888-863-0426 with any other questions.

      Thank you!

      -BDP

    • Vinny on April 29, 2020 at 10:00 am

      My truck gives lots of heat when the dial is on cold

      • BlueDevil Pro on April 29, 2020 at 10:29 am

        Vinny-

        Is the vehicle overheating when you have the A/C on? Please contact our technical support line at 888-863-0426 so that we can get a little better understanding of the vehicle’s condition and be able to make any appropriate recommendations.

        Thank you!

        -BDP

  8. treazura on May 14, 2019 at 5:49 pm

    my car is going straight to hot after getting my alternator replaced but there is no smoke coming out but it is making this grinding noise

    • BlueDevil Pro on May 15, 2019 at 10:02 am

      Treazura-

      Is the vehicle overheating or is the temperature just fluctuating? Was the vehicle losing water/coolant? Please contact our technical support line at 888-863-0426 so that we can get a little better understanding of the vehicle’s condition and be able to make any appropriate recommendations.

      Thank you!

      -BDP

  9. CJ on May 20, 2019 at 9:00 am

    My vehicle’s entire engine bay (hood and all parts under the hood) becomes very hot to the touch in a short amount of time. The vehicle does NOT overheat, and temperature gauges are all normal. The vehicle did not always feel so hot to the touch after use but has for some time now. I am concerned with parts becoming damaged over time even though most are heat resistant–the amount of constant heat is unusual. I am curious if this is potentially a radiator, thermostat, or water pump issue.

    • BlueDevil Pro on May 20, 2019 at 10:21 am

      CJ-

      Are the fans kicking on in this short amount of time? Usually, if the thermostat and/or water pump are faulty, you will have an issue with overheating. The fact that you are saying the temp gauge is staying in the normal range lends to reason that both are working properly. Please contact our technical support line at 888-863-0426 so that we can get a little better understanding of the vehicle’s condition and be able to make any appropriate recommendations.

      Thank you!

      -BDP

      • Brittany on July 27, 2020 at 1:40 am

        I’m going through the same thing Was wondering what advice you gave and it’s shifting front 1st-2nd gear alittle different

        • BlueDevil Pro on July 27, 2020 at 9:24 am

          Brittany-

          Are you noticing any other symptoms? How many miles are on the vehicle? Please contact our technical support line at 888-863-0426 so that we can get a little better understanding of the vehicle’s condition and be able to make any appropriate recommendations.

          Thank you!

          -BDP

        • Ben on October 23, 2020 at 4:01 pm

          Did you find out what the issue was? I’m having the same problem although the shifting differently just started. Seem to only be 1st to 2nd. Has to rev to like 3 or 4k before shifting.

          • BlueDevil Pro on October 26, 2020 at 8:26 am

            Ben-

            Feel free to contact our technical support line at 888-863-0426 with any questions.

            Thank you!

            -BDP



    • Anthony Wigley on August 13, 2019 at 9:50 am

      Cj mine does the same thing in my 4.8 silverado but my 4.8 tahoe and my 5.3 z71 tahoe do not even at idle. It’s not really a concern for me except somedays my 4.8 silverado is my work office”security”.I have the same concern that you have about Parts being at a constant high temperature when I am sitting in the lot I usually raise my hood and park in the shade if not heat can be felt from 5 ft away from the vehicle with the hood closed to the point that the AC have a hard time cooling the vehicle on the inside other than that though my AC blow frigid when the hood is open and on hot days rolling down the road. It is an older truck so I was even thinking about cutting a hole in the hood and putting a louvered Hood like some 4x4s have or putting a exhaust fan on the top like you see external radiators have.

  10. Jen M on June 8, 2019 at 9:13 am

    2013 2.4 liter Dodge Advenger…all new top engine heads and gaskets and thermostat a year ago. 160k miles, was running great until yesterday. When I noticed that the car is running hotter then usual. Its usually at the 1/2 way mark…its now creeping above it. I see no leaks, fluids are full. No white smoke coming from exhaust…I am frustated. Any ideas, spent so much money on this last year…Help. thanks. Jen in NJ

    • BlueDevil Pro on June 10, 2019 at 9:19 am

      Jen-

      Thank you for asking about your Dodge Avenger. Are you hearing the fans click on when the temperature starts to rise? Please contact our technical support line at 888-863-0426 so that we can get a little better understanding of the vehicle’s condition and be able to make any appropriate recommendations.

      Thank you!

      -BDP

  11. Keisha cobb on June 10, 2019 at 11:55 am

    Hello I’m having the puzzling issue with my car, so I have a 2007 dodge caliber that doesn’t quite over heat but my sensor comes on after driving for a long period of time. The maximum drive time is about 2hrs straight (road trips) and the CTS will come on but the temperature gauge will remain at a cool level , but the CTS coming on will cause the car to slow down to a complete stop and will not start till the car has cool down why is that ? Remind you the car doesn’t overheat

    • BlueDevil Pro on June 10, 2019 at 12:20 pm

      Keisha-

      Thank you for asking about your Dodge Caliber. Are you hearing the fans kick on when the coolant temperature sensor light comes on? Based on your description, it may just be a faulty temperature sensor, which replacing the sensor would alleviate the issue. Feel free to contact our technical support line at 888-863-0426 with any other questions.

      Thank you!

      -BDP

  12. Caitlin Q on June 15, 2019 at 11:37 pm

    Hello,
    Last night my car was running warmer than usual- at about the 3/4 mark- and after i parked it, it started to leak quite a bit of coolant. I thought there was a hose or reservoir leak so i let it cool. Now i can not find any leaks, and my coolant is still sitting close to full. There was no steam and it never actually overheated. Any ideas on what could cause this?

    • BlueDevil Pro on June 17, 2019 at 9:31 am

      Caitlin-

      What kind of vehicle was it and how many miles are on it? Please contact our technical support line at 888-863-0426 so that we can get a little better understanding of the vehicle’s condition and be able to make any appropriate recommendations.

      Thank you!

      -BDP

  13. Lannie on June 29, 2019 at 9:06 am

    My Hyundai i20 2009 is the fan is kicking, everything runs fine, the temp gauge is seating at half but the engine and the radiator pipes are very very hot no leaks just hot I removed the thermostat, thought it was dead but I never replaced it I biapassed it. Any idea

    • BlueDevil Pro on July 1, 2019 at 11:06 am

      Lannie-

      Thank you for asking about your Hyundai. Based on your description, it doesn’t seem like there is an issue. The temperature gauge sitting at about the half way mark is normal operating temperature in most vehicles. Feel free to contact our technical support line at 888-863-0426 with any other questions.

      Thank you!

      -BDP

  14. Candie D Smith on July 6, 2019 at 10:22 am

    I have a 2005 Nissan Pathfinder i started smelling antifreeze so i parked vehicle to cool off as it was cooling off antifreeze started leaking. My gauges never showed hot. I filled it up again let it run for a few minutes and noticed there was no circulation. What can be the problem?

    • BlueDevil Pro on July 8, 2019 at 9:30 am

      Candie-

      Thank you for asking about your Nissan Pathfinder. Circulation can be restricted for a number of different reasons. Perhaps the thermostat is stuck closed and not allowing proper circulation. You can test the thermostat by removing it and putting it in boiling water. The water pump could also be the culprit, as its responsible for circulation. Another possibility is that jellied antifreeze or other debris could be clogging/restricting flow. Flushing the cooling system should alleviate the lack of circulation if that is the case.

      Hope this helps!

      -BDP

  15. Wendy on July 7, 2019 at 8:53 am

    2002 Honda Accord. Car is running hot. Runs good for about two weeks and guauge starts rising. Changed thermostat. Flushed raditor, fans running good, coolant good. Could new radiator be needed.

    • BlueDevil Pro on July 8, 2019 at 10:34 am

      Wendy-

      Thank you for asking about your Honda Accord. Depending on the mileage on the vehicle, the water pump is another possibility as to why it would be running hot. A water pump that is just starting to go could not be pumping water/coolant properly but, circulate just enough to keep it from overheating immediately.

      Hope this helps!

      -BDP

  16. Joseph G on July 7, 2019 at 11:36 pm

    i have a 2005 honda civic. Recently the temperature gauge has been reading hot, all the way up passed the H. the engine however is not running hot at all. coolant levels are fine and i even have a bluetooth ODB code reader that shows the coolant temperature at around normal, nor am i getting any engine codes for the cooling system. at first i thought it might be the temperature sensor under the hood but now im just thinking the dial is stuck in the wrong position. when i turn the car off and all the other gauges including fuel drop down, the temperature one stays all the way up. any ideas or suggestions??

    • BlueDevil Pro on July 8, 2019 at 11:06 am

      Joseph-

      Thank you for asking about your Honda Civic. The fact that you are not getting any engine codes or warning indicators leads us to believe that it wouldn’t be a faulty temperature sensor. Have you noticed any issue with engine start up or have you experienced a lack of power? Please contact our technical support line at 888-863-0426 so that we can get a little better understanding of the vehicle’s condition and be able to make any appropriate recommendations.

      Thank you!

      -BDP

  17. Ross Williamson on July 11, 2019 at 11:38 pm

    Hi.. My car needed coolant topped off 5 times today. Temperature gauge read normal.

    • BlueDevil Pro on July 12, 2019 at 9:28 am

      Ross-

      It sounds like you are losing coolant very rapidly. Are you noticing any other symptoms? Please contact our technical support line at 888-863-0426 so that we can get a little better understanding of the vehicle’s condition and be able to make any appropriate recommendations.

      Thank you!

      -BDP

      • Jessica on July 15, 2019 at 3:13 pm

        My 2002 pt cruiser has been red lining the temp dial.. out of know after driving a bit the temp hand will start rising up pretty fast to the max, and il turn the heat wide open and try to hit a pot hole in case the thermostat is sticking and then the temp hand will go back to normal. This will happen at least once within a 20-30 min time frame. I’m not losing any water .. please help!

        • BlueDevil Pro on July 15, 2019 at 3:54 pm

          Jessica-

          Thank you for asking about your PT Cruiser. Based on your description, a faulty thermostat is the likely culprit. The thermostat regulates your engine temperature. If antifreeze can’t flow through your radiator, the heat can’t disperse into the air as it should, causing the vehicle to over heat. Replacing the thermostat should solve your problem.

          Thank you!

          -BDP

    • Carlo Garcia on November 17, 2022 at 7:49 pm

      my car temp goes up sometimes and goes back to normal coolant is good just got another raditor cap checked thermostat found no leaks,fan is working taking it to jiffy lube constantly for check ups cant find out what the problem is its a 2002 pt cruiser

      • BlueDevil Pro on November 18, 2022 at 8:27 am

        Carlo-

        The problem you’ve described would usually point towards a faulty thermostat. If you have not done so already, try replacing the thermostat to see if that fixes the issue. If the problem persists, we’d recommend bringing the vehicle to a certified ASE mechanic for a proper diagnosis.

        Thank you!

        -BDP

  18. Trevion on July 12, 2019 at 11:43 am

    I got an 06 Chevy Malibu and when I drive it for a long period of time it won’t overheat but it’ll run hot and quit driving acting like it don’t wanna go anywhere.

    • BlueDevil Pro on July 12, 2019 at 3:30 pm

      Trevion-

      Thank you for asking about your Chevy Malibu. Please contact our technical support line at 888-863-0426 so that we can get a little better understanding of the vehicle’s condition and be able to make any appropriate recommendations.

      Thank you!

      -BDP

  19. Travis Carl Eash on July 15, 2019 at 4:33 pm

    My 2006 Jeep has the 5.7 hemi and lately has been getting up to temp in less than 5 min of idling but never goes past normal running temp. I believe it is also sometimes causing the engine to stall if it heats too quickly. I’m thinking thermostat or a sensor any thoughts suggestions.

    • BlueDevil Pro on July 16, 2019 at 10:30 am

      Travis-

      Thank you for asking about your Jeep. If the thermostat was stuck closed, you would have an issue with overheating, not just getting up to normal operating temperature. Have you noticed any other symptoms? Please contact our technical support line at 888-863-0426 so that we can get a little better understanding of the vehicle’s condition and be able to make any appropriate recommendations.

      Thank you!

      -BDP

  20. Isaiah on July 25, 2019 at 6:44 pm

    I have a 2000 Dodge Durango, and when I drive my truck after an hour or two the temperature starts to increase. It never overheats though.. It will run at a low temperature for the first hour or so.. Then it will increase to about 210. Then it starts to drive funny and it has even smoked( that stopped when I got a new radiator cap) I don’t know what’s the problem. Any suggestions?

    • BlueDevil Pro on July 26, 2019 at 10:06 am

      Isaiah-

      Thank you for asking about your Dodge Durango. Have you noticed a loss of water/coolant? It’s possible the thermostat is becoming stuck at times, causing the rise in temperature. You can test the thermostat to make sure it is functioning properly by placing it in boiling water and testing to see it is opening up at the proper temperature. If not, replacing the thermostat would be your best bet.

      Thank you!

      -BDP

  21. Laura on July 27, 2019 at 3:53 pm

    Hi I have a 2013 Chevy Cruze and the tempature light comes on as soon as u start the car and the check eingine light is on… there seems to be no leak and the gauge goes to H but the car isn’t really hot like I said u can start it and it will start off saying it is hot what could this be thanks

    • BlueDevil Pro on July 29, 2019 at 10:05 am

      Laura-

      Thank you for asking about your Chevy Cruze. If it seems like coolant is flowing normally and you are not experiencing a leak, it may be an issue with temperature sensor being faulty. If coolant flow seems restricted, some possibilities as to why it would overheat are a faulty thermostat, water pump going bad or a clog in the cooling system.

      Hope this helps!

      -BDP

  22. Jeffrey Walls on August 2, 2019 at 6:44 pm

    I have a 2005 Honda Accord hybrid and it stalled out and when I press the gas the whole car looses power and won’t go and jerks and it’s only happened in weather over 105 degrees but the temperature gauge is not going up. What is wrong?

    • BlueDevil Pro on August 5, 2019 at 9:06 am

      Jeffrey-

      Thank you for asking about your Honda Accord. Have you noticed a loss of water/coolant? Please contact our technical support line at 888-863-0426 so that we can get a little better understanding of the vehicle’s condition and be able to make any appropriate recommendations.

      Thank you!

      -BDP

  23. JD on August 11, 2019 at 12:03 am

    I have a 01 Honda Accord V6 EX or LX Sedan. My cars temperature gauge (while driving) goes down to about 1/4 but then when i stop or go idle, the temperature gauge slowly goes right to the middle. Radiator fluid level is in between min and max also. And when i start my car I hear almost a bumbling noise that’s coming from the passenger side, (where i think maybe my water pump is at) behind the vents. Do you know what may be the cause?? I know a good bit about cars and i think it might be a sign or my car trying to tell me my waterpump is about to go or break very soon. Thank you so much, and i appreciate you taking the time to read my post.

    • BlueDevil Pro on August 12, 2019 at 10:58 am

      JD-

      Thank you for asking about your Honda Accord. Usually, if the temperature gauge shows the temp going down while driving, it is indicating the thermostat isn’t functioning properly and may be stuck open. We recommend replacing the thermostat.

      Thank you!

      -BDP

  24. Mariana Chavoyo on August 20, 2019 at 3:52 pm

    Hi I have a 2011 Kia Sorento , About 98,000 Miles And Just recently my car started leaking coolant and the temperature gauge goes up all the way To the H , when I turn on the car all the coolant just falls out , do you know what this might be?? Thank you So Much!

    • BlueDevil Pro on October 2, 2019 at 9:17 am

      Mariana-

      Thank you for asking about your Kia Sorento. Are you able to locate where the coolant leak is coming from? With the amount of coolant it sounds like you are losing, and how quickly you are losing it, it’s possible you have a loose hose connection allowing coolant to spew out when the car is started. If you are unable to locate the leak, you may want to bring the vehicle in to a shop for an inspection.

      Thank you!

      -BDP

  25. Nj on November 13, 2019 at 1:03 am

    Hello, I have a 2013 Buick Encore with 81000 miles on it.
    Well I have noticed puddles of coolant under my car, however the car does not over heat the temp gage does stay in the middle.No lights are on the dash.When I pop the hood to make sure there is still coolant inside I take the top off and the coolant will rise up and bubble not all the way back to the line though. so I just top it off.The car runs fine I just don’t know what’s the problem might be like what I might need to replace.

    • BlueDevil Pro on November 13, 2019 at 9:08 am

      Nj-

      Thank you for asking about your Buick Encore. Based on your description, it is possible that you are getting combustion/exhaust gases pumping back into the cooling system. You can use a “Block Dye Tester” to confirm whether or not that is the case. BlueDevil Head Gasket Sealer will still work if your vehicle is getting combustion/exhaust gases blowing into the cooling system and creating pressure. To give yourself the best overall chance of BlueDevil working successfully, in addition to the directions, you should remove the spark plug from the cylinder with the leak; this will be the spark plug from the cylinder with the low compression reading. If you are not sure which one that is, you may pull all of the spark plugs and will notice one will have a white-crystal-like substance on it and/or may look dirty; this is the plug you should pull. Leave that plug out for the 50 minute idle in order to relieve the pressure from building up and thus allowing the product to seal properly. Be sure to follow the guidelines for the proper amount to use based on the size of your cooling system.

      Thank you!

      -BDP

  26. Wit's end on November 17, 2019 at 10:43 am

    Hello, I have a 2007 Mercury Mariner. We have a fair amount of snow right now so I have to drive 3-4 miles in Low to get out onto a main road. Recently I’ve noticed steam coming from the front end after driving in Low. The temp gauge does not indicate that the engine is overheating and I can shift to Drive and drive down the highway with no apparent problems. Coolant level is topped off and there don’t appear to be any leaks. I would welcome any suggestions.

    • BlueDevil Pro on November 18, 2019 at 9:22 am

      Wit’s end-

      Thank you for asking about your Mercury Mariner. Based on your description, it’s possible the steam is simply condensation from the snow melting off the front of the vehicle. If the coolant is reading at the proper level and the vehicle isn’t overheating, it doesn’t sound like you are experiencing any kind of a leak. Continue to monitor the situation and perhaps try testing the vehicle in areas where there is not as much snow to see if you can duplicate the steam.

      Thank you!

      -BDP

  27. Mike on November 17, 2019 at 4:34 pm

    Hi. I have a 2004 Toyota Sienna with 130,000 miles on it. When I’m driving, the temperature gauge is at half. AC and heat are fine when driving. When i park or stop at a red light, the temp rises quite quickly, the heat blows cold or the AC blows warm, and the fan is really loud. When driving resumes, the fan sounds normal and AC and heat work again once temp gauge hits half mark.

    • BlueDevil Pro on November 18, 2019 at 9:29 am

      Mike-

      Thank you for asking about your Toyota Sienna. Based on your description, the best place to start would be to check that the thermostat is functioning properly. It’s possible that it is sticking closed at stops, restricting circulation and causing the vehicle to start overheating. Replacing the thermostat should fix the problem in this case. Also, a cooling system flush would get rid of any jellied antifreeze or other debris stuck in the system, that could potentially be impeding flow. If neither works to solve the issue, your best bet may be to bring the vehicle in for a proper diagnosis.

      Thank you!

      -BDP

  28. louis kelley on November 20, 2019 at 8:51 pm

    I have a 1997 chevy lumina and I have 243,000. It also has the same temperature problems as Mike explain on November 18th 2019. Will that same ingredient work here

    • BD Auto Pro on November 20, 2019 at 11:09 pm

      Louis,

      Thanks for your question about your 1997 Chevy Lumina. Yes, it’s possible you’ve got a stuck thermostat or dirty cooling system. If your car heats up at a stop and blows cold air when the heat is on we would recommend starting by checking your coolant level as low coolant cause also causes that to happen. Similarly, we would recommend checking your cooling fans to make sure they are coming on when your car gets hot. If your cooling fans are broken your car will overheat while idling but you will still get heat from your ventilation system. If your cooling system is clean and your thermostat and cooling fans are working correctly then you may need a new water pump.

      Thanks again for your question!
      -BD Auto Pro

  29. ERIC on November 30, 2019 at 10:29 pm

    2006 Toyota Corolla. The temperature gauge is not going past the midpoint which is completely normal. It’s about 40 degrees outside. However, it seems that the gauge gets to the midpoint a lot quicker after sitting for awhile. Usually it takes about 5-10 minutes to get there. Now it gets there in about 3 minutes – or in a mile. I’m not using the heat, and the heat/AC is pointed at the midpoint.

    Is this a problem or am I overreacting? I had a car catch on fire almost 10 years ago and last week I was driving my father’s truck (it was 23 years old) and it caught fire. So sometimes I think I am little sensitive to stuff like this.

    • BlueDevil Pro on December 2, 2019 at 10:00 am

      Eric-

      Thank you for asking about your Toyota Corolla. Based on your description, it doesn’t sound like anything to be alarmed about. It would be a good idea to check your fluid levels to ensure you’re not low on coolant. If the temperature gauge goes to the midpoint and then starts to drop, it could be an issue with the thermostat.

      Thank you!

      -BDP

  30. Adam Brunelle on January 8, 2020 at 9:18 am

    my car will stall sometimes after i start it, the thermostat keeps going up and down, and i have no heat while the car is idling. what do you think the issue is?

    Adam

    • BlueDevil Pro on January 8, 2020 at 10:20 am

      Adam-

      Have you noticed a loss of water/coolant? It sounds like you may have some kind of a restriction in the cooling system not allowing proper circulation. Please contact our technical support line at 888-863-0426 so that we can get a little better understanding of the vehicle’s condition and be able to make any appropriate recommendations.

      Thank you!

      -BDP

  31. NV April on February 27, 2020 at 7:13 am

    I own a Golf mk3 GS 1.8 ltr, My heat gauge goes on while the temperature stays at 75 degrees, what can be the problem? I’ve recently replaced my engine mountings and manifold (exhaust) gaskets my top gasket has also been replaced i have drained out the radiator and threw in clean coolant but my heat gauge light still goes on.

    • BlueDevil Pro on February 27, 2020 at 9:12 am

      NV-

      Thank you for asking about your Golf Mk3. Is it a low coolant indicator that is coming on? Is the needle on the temperature gauge going passed the half way mark or look like it is approaching overheating temperatures? Please contact our technical support line at 888-863-0426 so that we can get a little better understanding of the vehicle’s condition and be able to make any appropriate recommendations.

      Thank you!

      -BDP

  32. Jason on March 20, 2020 at 2:16 am

    Hi, having a few issues with LS2 6.0ltr engine it making a pinging knocking noise, only happens when at full temperature and after driving for 30mins, it has been to my mechanic he struggled to diagnose this problem.
    Noticed the other day when I pulled the bonnet up it was very hot in the engine bay, hotter than normal but it’s not overheating on the temp gauge, it’s even melted the insulation on a couple of ignition leads, do you think this could be a faulty thermostat, temp sensor or water pump, or not the right ratio of coolant in the cooling system.

    • BlueDevil Pro on March 20, 2020 at 10:16 am

      Jason-

      Are you noticing a loss of water/coolant? The possibilities you’ve pointed out like a faulty thermostat or bad water pump would typically result in overheating. A faulty temp sensor is a possibility, as you’ve indicated the temp gauge isn’t reading as overheating. Does the oil appear chalky/milky? If water is getting into the engine oil, it would explain the knocking sound you are hearing. If you are noticing a loss of water/coolant, another area to check might be the spark plugs. They would appear with a white, crystal-like substance (crystallized antifreeze). Feel free to contact our technical support line at 888-863-0426 with any other questions.

      Thank you!

      -BDP

  33. Ali on April 1, 2020 at 5:20 am

    Hi i have ford explorer,When I go for drive about 10km,and when I open Engine i found Colanat reservior and colanat pump too hot but It show no anysign inside car everything is fine,guaze temp show normal temp..but I am worried is it normal or any issue…