Having a leaking heater core can be one of the most frustrating leaks you can have in your vehicle. Almost any leak in your car is an external leak, meaning the leaking fluid will just leak out onto the ground. Sure, that isn’t the best for the environment and it can make a mess in your driveway or the parking lot at work, but at the end of the day as long as you keep your fluids topped off, you can keep driving your vehicle relatively comfortably.
What Does A Heater Core Do?
The purpose of a heater core is to bring warm coolant into the cabin of your vehicle so the ventilation air can be warmed up allowing your car’s defroster and heater to work properly. Think of it as a small radiator.
What are the symptoms of a leaking heater core?
A leaking heater core usually will cause a much more annoying leak. On most new vehicles, the heater core is inside the cabin of the vehicle. Even if you have an older vehicle with the heater core outside the cabin, leaking fluid can still find its way into the cabin through the ventilation ducts.
Having coolant leaking into the cabin of your vehicle can cause all sorts of problems. First, when your car isn’t warmed up yet, the coolant will make a mess on your floorboards and possible start the process of corrosion. As the coolant leaks onto your floor it will soak into your carpet and the padding. As this moisture stays trapped in your carpet it can start to corrode the floor pan in your car. Since this is all happening under the carpet, it can quickly get out of control without you ever knowing. In the worst case, this corrosion can compromise the integrity of the floor of your vehicle making it unsafe.
Another problem with coolant leaking into the cabin of your vehicle is that once it is warmed up, that coolant will be almost 200 degrees! This hot coolant will quickly turn to steam in your car and will definitely cause an unpleasant odor. The steam can also quickly spread through your ventilation system making it very difficult to remove the odor. Depending how big the leak is, the steam can cause fogging problems on your windows and leave you with no way to clear the condensation since it is your ventilation system that is spreading the problem. Lastly, antifreeze is a poisonous substance so breathing in its vapors can even be harmful to you and your passengers.
If you have a leaking heater core, then you may have experienced some of these symptoms and have realized how frustrating it can be. It isn’t unusual for heat cores to develop leaks because they are often made from relatively thin metal to help aid in the heat transfer from the hot coolant inside to the air being blown over it by your vehicle’s HVAC system. This thin metal can develop cracks over time and the joints in your heater core can start to come loose due to vibrations in your vehicle and bumps in the road.
Can I replace a leaking heater core?
Replacing a leaking heater core can be an extremely annoying project due to its location in your vehicle. The heater core needs to be right next to the fan that pushes the air through your ventilation system. That fan needs to be near the firewall of your car so it can have the ability to both pull air in from outside the vehicle, or recirculate the air in the cabin depending on the settings of the system. If you have air condition in your car, then the AC evaporator will be right next to the heater core which is also a delicate piece of equipment that is difficult to move.
Can I repair a leaking heater core?
Fixing a leaking heater core will always be much easier than replacing one. Since it is only a small leak in the heater core, we recommend simply sealing that leak and leaving your heater core in place. You can do this by simply by adding BlueDevil Pour-N-Go to your vehicle’s radiator when your vehicle is cold. When BlueDevil Pour-N-Go reaches the leak point, the temperature differential will cause a chemical weld to form sealing your leak without affecting any other part of your cooling system.
To learn more about BlueDevil Pour-N-Go, visit our website here: Pour N Go Head Gasket Sealer
You can purchase BlueDevil Pour-N-Go from 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 Distributer
- DYK Automotive
Pictures provided by:
heater_core.jpg – By JAK SIE MASZ – Licesned By Creative Commons Via Flickr – Original Link
I have this problem. I easily found this sight with a search engine and was very impressed. The article is informative and not imposing. Kudos to whoever is in charge of your marketing.
Thanks,
Joni
I believe I have a bad or leaking heater core. I would love to try this product. I’m not sure how to flush my system out. Can I just add it to my antifreeze
Ashley-
Yes, you may add the BlueDevil Pour-N-Go Head Gasket Sealer (https://store.gobdp.com/pour-n-go-head-gasket-sealer-00209/) to your existing antifreeze. Feel free to contact our technical support line at 888-863-0426 with any other questions.
Thank you!
-BDP
Do i just pour this in my coolant resivoir to seal my heater cord
Debra-
If your vehicle only has a reservoir/overflow rather than a radiator cap, instead of pouring BlueDevil through the reservoir/overflow, with the car off and engine cold you should disconnect the top radiator hose and add the product there; do not pour it into the reservoir. It may be added into the hose or the opening on the radiator. Once BlueDevil has been added, reconnect the hose and start the idle from that point.
Thank you!
-BDP
I PUT IT IN THE RESIVOIR WILL HE DO ANY DAMAGE
Eleanor-
Adding the BlueDevil Head Gasket Sealer through the reservoir could cause the product to start reacting before it gets a chance to circulate, as the engine may be hot by the time the product is pulled into the system. Feel free to contact our technical support line at 888-863-0426 if you run into any questions.
Thank you!
-BDP
I have heater core leak but it’s not leaking on inside it’s leaking at firewall will blue civil stop this
James-
Yes, the BlueDevil Head Gasket Sealer would be able to treat the heater core leak you’ve described. As long as you are not losing water/coolant too quickly, you would be a good candidate for the product. Feel free to contact our technical support line at 888-863-0426 with any other questions.
Thank you!
-BDP
I have a 1996 Cadillac DeVille, it’s not leaking in the inside of the car it’s on the outside of the car, will this product help some or even work for a while or do you have any other suggestions… I really appreciate you just for taking time out to read. Thank you and God Bless US ALL… AMERICA…
Tari-
The BlueDevil Head Gasket Sealer would be able to treat the heater core leak on your Cadillac Deville. As long as you aren’t losing coolant too quickly, you would be a good candidate for the product.
Thank you!
-BDP
I am leaving antifreeze there seems to be a big puddle after the car sits overnight not sure where the dick is actually coming from if it’s coming from the radiator or the reservoir or a hose if I use your product will this stop the leak or should I have to take my car into a mechanic
Michael-
Based on your description, we’d recommend having the vehicle inspected and the leak diagnosed. It would be best to confirm the source of the leak before exploring solutions, as this could save you money from unnecessarily replacing parts.
Thank you!
-BDP
I have a 2008cadallcCTS will this product work for sure
Ignacio-
Yes, the BlueDevil Head Gasket Sealer would be safe and compatible to use for the heater core leak on your Cadillac CTS. As long as you are not losing coolant too quickly, you would be a good candidate for the product.
Thank you!
-BDP
I have a 2005 Toyota Camry losing coolant but still have half in resovoiur ..Heat still works but not strong
James-
Thank you for asking about your Toyota Camry. Are you saying you have a heater core leak or that you are losing coolant and you’re not sure where the leak is coming from? Is the vehicle overheating at all? 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
I have a 98 Wrangler TJ when I start my car and use my heater it fogs up my windows and smells like antifreeze but it’s not leaking inside will your product work on a ceiling my heater Box
Mike-
Thank you for asking about your Wrangler. The BlueDevil Head Gasket Sealer would be able to treat a leaking heater core. 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
leak was fixed after about 20miles and running the heater core ,core and heater must be turned on to circulate core fix chemical to circulate.It does work for small core leaks but not a hose leak.
My thoughts exactly, great content marketing! Thanks for this article.
I have a question I have a 2003 Jeep Liberty I used it a couple months ago for freeze plugs and it worked tremendous now I believe I have a heater for a leak because the carpet is soaked and the windows inside are fogging up can I use another bottle to pour in
Steve-
Thank you for asking about your Jeep Liberty. We are glad to hear that you’ve already had success with the product! Yes, you can safely use the BlueDevil Head Gasket Sealer to seal your heater core leak. You would follow the same instructions as you did the first time.
Thank you!
-BDP
I am about to use blue devil in my car but my heater cord is unplugged,,will it still work for the gasket
Jenifer-
Thank you for your question. The direction about putting the heater on to the max is to draw heat from the engine to keep it from overheating during that 50 minute idle. As long as the vehicle isn’t going to overheat during that 50 minutes, the product should be able to help seal your leak.
Thank you!
-BDP
Do I need to flush my radiator before using blue devil to seal a leak in my heater core?
Sue-
Yes, for best results you should flush your cooling system prior to applying BlueDevil Head Gasket Sealer (http://store.gobdp.com/head-gasket-sealer-38386/).
Thank you!
-BDP
Does the radiator need to be flushed afterwards?
Josue-
No , it would only be necessary to flush the system prior to adding the BlueDevil Head Gasket Sealer http://store.gobdp.com/head-gasket-sealer-38386/. You can simply drain the radiator and refill it with your regular 50/50 mix once the process is complete.
Thank you!
-BDP
I got a question how do i flush my radiator because i got a heater core leak
Jacob-
When radiator is cool, remove cap, open draincock and drain cooling system. Collect used antifreeze for disposal. When disposing used antifreeze/coolant, please follow local laws and regulations.
Close radiator draincock and fill cooling system with water. Reinstall radiator cap and run engine for 10 minutes with heater on max. Turn off engine for radiator to cool.
Repeat (Step 1).
Close radiator draincock and add BlueDevil RADIATOR FLUSH. Top off cooling system with water while motor is running. (Product services systems up to 12 quarts.) Replace radiator cap.
A. For only flushing your radiator, run engine with heater on max for 10 minutes.B. For deeper radiator cleaning, drive your vehicle for 3-6 hours at normal driving conditions or intermittently over a period of a few days, if weather permits. Do not let the cooling system temperature fall below 32 degrees F.
Allow engine to cool. Repeat drain procedure (Step 1). Flush cooling system thoroughly with water until all cleaner is removed.
Close drain and install required amount of antifreeze.
Thank you!
-BDP
Did it work did it stop the leak
Carolyn-
Feel free to contact our technical support line at 888-863-0426 with any questions.
Thank you!
-BDP
Hi if I have a heater core leak what blue devil product do I use pour and go head gasket or the liquid aluminum or what one is best to buy as my chevy equinox smells really bad in the cabin
Mike-
Thank you for asking about your Chevy Equinox. The BlueDevil Pour-N-Go Head Gasket Sealer (https://store.gobdp.com/pour-n-go-head-gasket-sealer-00209/) would be able to treat a heater core leak. As long as you are not losing water/coolant too quickly, you would be a good candidate for the product. Be sure to follow the guidelines for procedure and proper amount to use.
Thank you!
-BDP
I have 2004 Saturn Vue that has a very small leak in the heater core (i believe). No radiator cap and the engine is a Honda V6. I don’t especially want to disconnect the radiator hose to add it and would like to use the coolant reservoir.
Is this something I can do for this minimal problem?
Jim-
Due to your vehicle only having a reservoir/overflow rather than a radiator cap, we would have recommended that instead of pouring BlueDevil through the reservoir/overflow, with the car off and engine cold you would disconnect the top radiator hose and add the product there. Once it had been added reconnect the hose and start the idle from that point.
Thanks for your question!
-BDP
Would that be the Same advice for a 98 cadillac deville i justhave a tank and no radiator cap?
Troy-
Yes, if your vehicle only having a reservoir/overflow rather than a radiator cap, we recommend that instead of pouring BlueDevil through the reservoir/overflow, with the car off and engine cold you would disconnect the top radiator hose and add the product there. Once it had been added reconnect the hose and start the idle from that point.
Thanks for your question!
-BDP
is there a certain bottle to buy for the northstar engines?
Glenn-
To properly treat a V-8 Northstar engine with a heater core leak, the BlueDevil Head Gasket Sealer (https://store.gobdp.com/head-gasket-sealer-38386/) is the product you would want to use. Feel free to contact our technical support line at 888-863-0426 with any other questions.
Thank you!
-BDP
Yes arp studs.
I have a 2002 galant. The liquid is on my floor when I get up in the mornings. I know the heater core is the problem. Would blue devil head gasket seal be the best option for me . And do I pour it directly into the radiator?
Starr-
Thank you for asking about your Mitsubishi Galant. Yes, the BlueDevil Head Gasket Sealer would be able to treat a leaking heater core and also be poured directly into the radiator. Feel free to contact our technical support line at 888-863-0426 with any other questions.
Thank you!
-BDP
I have a 2005 Grand Jeep Cherokee and I also have a small heater core leak can I use this item
Troy-
Yes, you may use the BlueDevil Head Gasket Sealer on your Jeep Cherokee to treat your small heater core leak. As long as you are not losing water/coolant too quickly, you would be a good candidate for the product. Feel free to contact our technical support line at 888-863-0426 with any other questions.
Thank you!
-BDP
I have a 2000 dodge ram 2500 with what I believe is a heater core leak. I get no heat when driving and when I turn the truck off, smoke starts coming out of the front. Do you think BlueDevil Pour-N-Go would help or do you think I’ll have to spend $500-$700 replacing it. Thanks!
Sean-
Thank you for asking about your Dodge Ram. Based on your description, we would recommend using the BlueDevil Head Gasket Sealer (32 oz yellow label). The BlueDevil Pour-N-Go Head Gasket Sealer is intended for use in 4 or 6 cylinder engines. Feel free to contact our technical support line at 888-863-0426 with any other questions.
Thank you!
-BDP
My wife’s 2002 Chevy Blazer was stolen and the next day My wife and daughter tracked down the thief in the blazer and pushed him in a snow bank where it sat for several hours running and in reverse before the cops came and released it to them. The temp in the truck was around 200. The next day windows fogged up and fluids leaked onto the floor board and the heat stopped. Is this the heater core or some other problem. The blower works great, the guages show temps rising to 200 plus but no heat comes out and the windows fogged up.
Michael-
Are you able to determine just how quickly you are losing antifreeze at this point? The BlueDevil Head Gasket Sealer (http://store.gobdp.com/head-gasket-sealer-38386/) could potentially be a good option depending on the severity of the problem.
Please give our tech support team a call at 888-863-0426 so that we can discuss the vehicle in more detail.
Thank you!
-BDP
Poured in Blue Devil pour and go car has a funny smell I can not get rid of after putting this stuff in steam clean the whole car still the same work as a professional cleaner in the past so I know it’s so I know it’s a not about cleanliness
Natale-
We have not had an issue with the car smelling funny after use of the BlueDevil Pour-N-Go Head Gasket Sealer. Please contact our technical support line at 888-863-0426 so that we can get a better understanding of the vehicle’s symptoms and be able to make any appropriate recommendations.
Thank you!
-BDP
I have a 2003 Audi a4 3.0 Quattro and my heater core is leaking, which product would work best to fix it.
Nicholas-
Thank you for asking about your Audi A4 Quattro. The BlueDevil Head Gasket Sealer, http://store.gobdp.com/head-gasket-sealer-38386/ , is what you would want to use for a heater core leak. As long as the vehicle can maintain idle for a full 50 minutes, and you are not losing more than about a quart of water/coolant during that 50 minutes, you would be a great candidate for the product.
Thank you!
-BDP
Would this work for a Lincoln town car
Gerrad-
Yes, the BlueDevil Head Gasket Sealer is safe and compatible to use on your Lincoln Town Car. Feel free to contact our technical support line at 888-863-0426 with any other questions.
Thank you!
-BDP
My Chrysler pacifica has a leak in the heater core and it smoking out the vents what to do???
Nita-
Thank you for asking about your Chrysler Pacifica. Based on your description, we recommend using the BlueDevil Head Gasket Sealer, found here: http://store.gobdp.com/head-gasket-sealer-38386/. As long as the vehicle will maintain an idle for 50 minutes, without overheating or stalling out, and you are not losing more than about a quart of water/coolant during that 50 minutes, you would be a good candidate for the product.
Thank you!
-BDP
Can I use blue devil on my V8 4.6L Grand Marquis’s
Hardges-
Yes, the BlueDevil Head Gasket Sealer is safe and compatible to use on your Grand Marquis. Feel free to contact our technical support line at 888-863-0426 with any other questions.
Thank you!
-BDP
Hi I have a 07 vw passat with turbo I have a water leak so.ewhere just don’t know where I think it’s the heater core leaking cause in the morning on the passenger side floorboard will be wet ..and when I drive it I can go for bout 50 miles before it overheats what product would be good for this problem
Leonard-
Thank you for asking about your Volkswagen Passat. The best product to use for your leaking heater core is the BlueDevil Head Gasket Sealer. The product is intended for leaks that are seeping or lightly dripping, so it sounds like you would be a good candidate for the product.
Thank you!
-BDP
I have a 2007 Chevy Aveo the Heater core is leaking will the product work to stop the leak
George-
Thank you for asking about your Chevy Aveo. Yes, the BlueDevil Head Gasket Sealer would be able to seal a leaking heater core. Feel free to contact our technical support line at 888-863-0426 with any other questions.
Thank you!
-BDP
Do it work
Cedric-
Overall, the BlueDevil Head Gasket Sealer carries a very high success rate of a little over 90%. As long as you are not losing water/coolant too quickly, and the vehicle is able to idle for a full 50 minutes, the vehicle would be a good candidate for the product.
Thank you!
-BDP
I have a 2002 mercury Sable ..an on my passenger side floor I have a leak probably from heater core but it’s going into my carpet on that side …an my air conditioning is blowing but hot air an no freon is in my air conditioning it leak out all of it ..my question is …can my heater core has something to do with my air conditioning freon leaking out all the way ? Plz help me out ..I need know what to do ..I don’t have much money ..
David,
Thanks for your question about your Mercury Sable. We can’t think of any way your leaking heater core could be related to your AC leak, it is probably just a coincidence. Our recommendation would be the fix the leak in your heater core quickly to keep your engine from over heating and causing more damage. You can use BlueDevil Pour-N-Go (available here: http://store.gobdp.com/pour-n-go-head-gasket-sealer-00209/) to seal that leak to keep your engine safe. When you have a chance later, you can use RedAngel AC Stop Leak (available here: http://store.gobdp.com/a-c-stop-leak-aerosol-00222/) to seal the leak in your air conditioning, then refill it to get that back to normal.
Thanks again for your question!
-BD Auto Pro
I have a question I have a 2000 mits eclipse with a blown head gasket n fixing to use blue devil but my heat doesn’t work so will that be a problem and if it starts to run hot during this process what do I need to do.. Thanks ..
Amanda-
Thank you for asking about your Mitsubishi Eclipse. The direction of turning the heater on with the blower to the max, while performing the BlueDevil Head Gasket Sealer procedure, is to draw heat from the engine to keep it from overheating during the 50 minute idle. Unfortunately, if the vehicle is unable to idle for the full 50 minutes without overheating, it may just be that the leak you have or symptoms you are having are just a little to extreme for the product. Feel free to contact our technical support line at 888-863-0426 with any other questions.
Thank you!
-BDP
Is this product safe to use with a turbo charged engine ?
James-
Yes, the product is safe to use with turbo charged engines. Feel free to contact our technical support line at 888-863-0426 with any other questions.
Thank you!
-BDP
I Have an 01 Ford Expedition. When I turn on heater it smells like antifreeze. What should I do.
Carlos-
Thank you for asking about your Ford Expedition. Have you noticed a loss of water/coolant? Please contact our technical support line at 888-863-0426 so that we can get a better understanding of the vehicle’s symptoms and be able to make any appropriate recommendations.
Thank you!
-BDP
Carlos: I also have a 2000 Ford Expedition with the same problem. Email me if you can and let me know if you were able to get yours fixed. Thanks
G
There’s a small leak where my heater hose is clamped and connected to my heater core, will this do an adequate job in stopping the leak?
Vehicle is a 1999 VW Passat 2.8l v6
Pat-
Unfortunately, BlueDevil Pour N Go Head Gasket Sealer is not intended for that type of leak. If it were the physical heater core leaking then yes, we would recommend BlueDevil. However, due to it being the clamp connection and/or the hose, we recommend having the clamp & hose replaced. This should stop the leak and should be fairly easy to access and replace.
Thank you!
-BDP
I have a 1985 camaro and it slowly loses coolant with no apparent sign of leakage on the ground or floor board. I replaced the intake gasket and still, I slowly lose coolant and the car heats up 200°+. The heat works fine, no odor or condensation on windshield. Head gasket?
Does the heater core sealant work for the radiator also? It seems to run fine in cooler weather but when it’s hot out, that’s when I start having problems. Thanks for any info.
A.J.-
We recommend using a bottle of BlueDevil Radiator & Block Sealer if the radiator is leaking. What specific symptoms are you seeing?
Thank you!
-BDP
Can i use blue devil radiator anblock sealant and head gasket sealant together i have a cracked block and bad heater core
Victor-
Based on your description, we’d recommend using the BlueDevil Head Gasket Sealer. The product would be able to treat both the block and heater core leak. It would not be necessary to add both.
Thank you!
-BDP
A.J.-
The symptoms you have described are common when a vehicle has a blown head gasket. We recommend using our BlueDevil Head Gasket Sealer (http://store.gobdp.com/head-gasket-sealer-38386/) to stop any coolant loss. The reason you may not be physically seeing some of the tell-tale signs of a blown head gasket is because you are catching it early on.
Feel free to contact our tech support team at 888-863-0426 with any questions regarding the product and/or your vehicle.
Thank you!
-BDP
My radiator is broken and I need a new heater core wwhich one should I fix first?
Mary-
Please contact our technical support team at 888-863-0426 so that we can get a better understanding of the situation and be able to make any appropriate recommendations.
Thank you!
-BDP
My heater core has a small leak as well as my head gasket….which product would you recommend?
Alonzo-
Based on your description, we recommend using the BlueDevil Head Gasket Sealer, found here: http://store.gobdp.com/head-gasket-sealer-38386/ . The Head Gasket Sealer would treat blown head gaskets, warped/cracked heads, leaking heater cores and leaking freeze plugs. Feel free to contact our technical support team at 888-863-0426 with any other questions.
Thank you!
-BDP
If I use Blue Devil how long before my heater core leaks again
Danny-
Once the product seals, it is a permanent seal. As long as you are not losing water/coolant too quickly, you should be able to see some good results. Feel free to contact our technical support line at 888-863-0426 with any other questions.
Thank you!
-BDP
My son has a 2002 Ford Crown Victoria. We had no issues with defrost or air until a few days ago when the dreaded “green fog” came out of the vents. We suspect the heater core is either leaking or gone bad. Would your product work for us? It would be at least 1200 to replace due to the need to pull out the dash so we’d like to avoid that expense.
Kelley-
Thank you for asking about your son’s Ford Crown Victoria. The BlueDevil Head Gasket Sealer would be able to seal a heater core leak. As long as you are not losing water/coolant too quickly and the vehicle can maintain idle for 50 minutes, then you should be able to see some good results. Feel free to contact our technical support line at 888-863-0426 with any other questions.
Thank you!
-BDP
I have a Ford 150 and I believe the coolant is leaking because it appears on my passenger side floor. Which product would you reccomend?
Liz-
Thank you for asking about your Ford F150. Based on your description, we recommend using the BlueDevil Head Gasket Sealer, found here: http://store.gobdp.com/head-gasket-sealer-38386/ . As long as you are not losing water/coolant too quickly and the vehicle can maintain idle for a full 50 minutes, you would be a good candidate for the product. Feel free to contact our technical support team at 888-863-0426 with any other questions.
Thank you!
-BDP
Hi
I have a 2005 Chyrsler Sebring. I noticed a red oily substance on my rear drivers side floorboard. I’m thinking its the heater core causing it. Which product would be best to use??
Kat-
Thank you for asking about your Chrysler Sebring. For a heater core leak, the best product to use would be the BlueDevil Head Gasket Sealer, found here: http://store.gobdp.com/head-gasket-sealer-38386/ . As long as you are not losing coolant too quickly, and the vehicle can idle for a full 50 minutes, you would be a good candidate for the product.
Thank you!
-BDP
When I turn on the heat I get the smell of coolant. Obvious I have a leak. If I use this product and if it seals the heater core will I still smell the coolant after the leak is fixed? Or will I have to spray something inside the HVAC to get rid of the smell?
Fernando-
We would like to speak with you in regards to whether or not you have actually noticed any loss of coolant. Please contact us at 888-863-0426 so that we can assist you in using BlueDevil Head Gasket Sealer. We are available Monday – Friday, 8:00 AM – 5:00 PM EST.
Thank you!
-BDP
Hi, I have a 2011 Cadillac and less than 2 months ago the heater core blew, fun fun! Well I just did it again! I’m 200 miles from home and the repair shop. I want to take it back to them, as it was over 1200$ to fix. I feel they should repair it! What can I do to safely drive it until I can get it home. I’m currently soaking up antifreeze with towels out of the floorboard.
T Jackson,
Thanks for your question about your Cadillac. IF you have a leaking heater core and need to just get your car home, you can locate the feed and return heater lines in your engine bay. They should run into the firewall near each other and one should connect to the engine near the water pump. If you remove the hoses from the heater core and use a connector rated for the temperature and pressure of your cooling system you can temporarily bypass your heater core to get your car back home. Most auto parts stores should sell the correct size connector and clamps you’ll need to accomplish this.
Thanks again for your question!
-BD Auto Pro
My F150, 2001has vapor coming into the passenger compartment. It overheats in stop and go traffic. I’ve had to turn on the heat to get the temp gauge away from the red zone. If I leave the air/panel off, it does not overheat. Returning to the time before AC isn’t something I want to do. There isn’t any apparent fluid loss. Will your product help prevent an expensive repair? The first mechanic I went to fix the problem said it sounded like a ‘flow problem’ and replaced the water pump to cure the overheating. That was not a cure. The vapor in the cab has started since then.
Susan,
Thanks for your question about your F150. Based on the overheating and the vapor in your cabin it sounds like you’ve got a leak in your heater core. It is possible that you’ve got a blocked heater core which could cause the overheated problem you’re having in which case you can try flushing your cooling system with BlueDevil Radiator Flush (available here: http://store.gobdp.com/radiator-flush-00204/).
Thanks again for your question!
-BD Auto Pro
I have a 2000 jeep grand cherokee. I have noticed a puddle of water in my passanger side floorboard. I was told it was my heater core. Would the bluedevil fix my problem?
Jinger-
Thank you for asking about your Jeep Grand Cherokee. The BlueDevil Head Gasket Sealer would seal a leaking heater core. As long as you are not losing water/coolant too quickly, you would be a good candidate for the product. Feel free to contact our technical support line at 888-863-0426 with any other questions.
Thank you!
-BDP
hi! I have a polo 1.4 tdi 2004 model and I experienced water leaking inside the passenger side and my mechanic opted to disconnect the heater pipes and plug them so there would be no circulation of water to the heater,can this product fix my problem and is it available in SA
DMK-
Yes, you can bypass the heater core to prevent the leaking you have seen recently. However, if you do so you will no longer be able to successfully use your heater.
Another option would be to run BlueDevil Head Gasket Sealer (http://store.gobdp.com/head-gasket-sealer-38386/) through your cooling system to seal the leak and stop any coolant loss. The product is available locally through AutoZone, Advance Auto Parts, O’Reilly Auto Parts, and other auto parts retailers near you.
Thank you!
-BDP
I have a 2002 Toyota Camry 4 cyl. 326,000 miles.
I’m getting a fruity smell while the vehicle is running after a little while (15+ mins.). Checked hoses, no leaks. Checked ground,not wet nor no collection of fluid on/in crossmembers. I do have AC and heat, no fogging interior.
Could this be possibly the start of a head gasket leak? If so what product to use.
Jorge-
Thank you for asking about your Toyota Camry. Based on your description, it is a little difficult to pinpoint what the issue is. Please contact our technical support line at 888-863-0426 so that we can get a better understanding of the vehicle’s condition and be able to make any appropriate recommendations.
Thank you!
-BDP
Hi i have a 1993 Jeep cherokee sport with a 4.0 straight 6. There is sweet sticky stuff on the passenger floor, i cleaned the floor and it came right back. It doesnt seem to really be using antifreeze, only a hair here and there. The engine doesnt overheat and the windows dont fog. Is this the heater core? And if so will the blue devil pour-n-go work?
Daniel-
Thank you for asking about your Jeep Cherokee Sport. Based on your description, it is very possible you are dealing with a heater core leak. The BlueDevil Pour-N-Go Head Gasket Sealer would be able to seal a heater core leak. It doesn’t sound like you are losing antifreeze too quickly, so the product should be able to help seal your leak. Feel free to contact our technical support line at 888-863-0426 with any other questions.
Thank you!
-BDP
I have a 2008 Ford Explorer and it’s dripping coolant from right up by the firewall. I’m almost 100% sure is my heater core. Which product should I use? The poor n go head gasket sealer or the poor N go radiator and block sealer. Why one produced over the other? And what is the best way to use it?
Thank you so much for your time and help!
Jessie-
Thank you for asking about your Ford Explorer. Based on your description, we recommend using the BlueDevil Pour-N-Go Head Gasket Sealer, as the Radiator & Block Sealer is specifically formulated for the radiator and/or the block. The BlueDevil Head Gasket Sealer would seal a leaking heater core. Feel free to contact our technical support line at 888-863-0426 with any other questions.
Thank you!
-BDP
I have a very small leak in my heater core and I’m interested in trying a leak sealing product, but I want to keep my car for a while and I’m worried about short term and long term side effects. After the 50 minute idle is over and the car cools down, won’t the temperature differential of the engine cooling down cause the remaining leak sealing product still inside the engine to chemical weld on the inside of the engine and components (water pump, etc)? I read a coolant flush before the treatment is recommended. Is a coolant flush also recommended afterwards to remove the remaining leak sealing product?
Ed-
BlueDevil Head Gasket Sealer only reacts during 1 heat cycle. It will not coat the entire cooling system; the chemical weld that is created will only be formed at the leak point. You will not need to flush your cooling system after applying the product. You may simply drain the system and refill with your factory recommended antifreeze.
Thank you!
-BDP
I have 2002 grand Cherokee Wj and I just changed the heating core because I was having a leak issue in the floor board. It’s still leaking in the floor board after I changed it and leaking outside the jeep. Would this stuff be able to fix my problem? I also believe it’s coming from the hoses under the hood connects to the heater core
Justin-
Thank you for asking about your Grand Cherokee. Based on your description, it sounds like you may have some loose hose connections. We would not recommend using the product in this case, as the product should not be used for leaking hoses or faulty hose connections. Inspecting and replacing any hoses necessary would be your best option.
Thank you!
-BDP
I have 97 Buick Century I’m not sure if I have a broken temorstat or a leak in the heating core or both. I have a foggie windshield there is something on my passager side floor but there is still plenty of coolant in my reserve and my radiator plus the leak only happens when the engine is cold
Willie-
Thank you for asking about your Buick Century. Based on your description, it seems more likely that you are experiencing a heater core leak rather than a thermostat issue. We recommend using the BlueDevil Head Gasket Sealer to seal your heater core leak http://store.gobdp.com/head-gasket-sealer-38386/. As long as the vehicle can maintain idle for a full 50 minutes and you are not losing more than about a quart of water/coolant during that 50 minutes, you would be a great candidate for the product.
Thank you!
-BDP
I have a 1996 ranger and the heater core has a leak. So I’ve by passed, but if I can seal the leak I would like to do that. Everything is already flushed out. So how much of the blue devil pour and go would I use and how do I mix it? Does it go in before the antifreeze? And do I do it with the car off and then once it’s filled up start it and let it idle for 50 min correct?
Forrest-
You will add your antifreeze first just leaving enough room for 16 ounces of BlueDevil Pour N Go Head Gasket Sealer. Once the antifreeze has been added you will start the engine and slowly add BlueDevil through the radiator cap. Once BlueDevil has been added you should tighten the radiator cap and allow the engine to idle for 50 minutes.
Feel free to contact us at 888-863-0426 with any further questions.
Thank you!
-BDP
Forrest-
Thank you for asking about your Ford Ranger. You would need 16 oz. of the BlueDevil Head Gasket Sealer to properly treat your vehicle. The product is formulated to work with the antifreeze already in your system, so your only real direction is to make sure you have enough room to add the product. When the engine is cold, you would remove the radiator cap and start the engine up. Slowly pour the product in through the radiator cap, put the cap back on, and allow the vehicle to idle for 50 minutes. Feel free to contact our technical support line at 888-863-0426 with any other questions.
Thank you!
-BDP
I have a 2002 Honda Civic and the heater no longer produces heat, it keeps leaking antifreeze, the oil temp gauge has started to go up at higher speeds, and the cabin sometimes smells like antifreeze. I think I have a heater core leak, does this sound accurate? Are there any side effects of adding the Blue Devil product I should be aware of? Things to look for? Is there a point at which adding the product is not likely to change how failed the heater core is?
Garrison-
Thank you for asking about your Honda Civic. Based on your description, we recommend using the BlueDevil Head Gasket Sealer http://store.gobdp.com/head-gasket-sealer-38386/. As long as the vehicle can maintain idle for a full 50 minutes, and you are not losing more than about a quart of water/coolant during that 50 minutes, you would be a great candidate for the product. Feel free to contact our technical support line at 888-863-0426 with any other questions.
Thank you!
-BDP
I have a 99 Chevy van 3500 it has started leaking from the heater core. Which is apparent cause the coolant on the floor board. The heater core was replaced new last year. I read that y’alls blue devil product is mainly for 4 or 6 cylinder engines. Will it fix the same problem on a 5.7 liter v8. Or would I need to use 2 bottles of yalls product
Brian-
Thank you for asking about your Chevy Van 3500. The BlueDevil Pour-N-Go Head Gasket Sealer is intended for use in 4-6 cylinder engines. You can still use the product on a V8, you would need at least 2 bottles to properly treat the vehicle.
Thank you!
-BDP
I have a 2002 Dodge Ram 3500 Van. In the winter in Minnesota, the inside of the windows (windshield, driver, passenger, rear) fog and then frost over and I am not able to see out. The van stays nice and toasty warm, but I can’t see out. I don’t see evidence of any leaks inside or outside. I never need to add coolant. How can I tell if it is a leaky heater core causing the fogging/frosting?
Eric-
Thank you for asking about your Dodge Ram 3500. If you are not noticing a loss of water/coolant and the vehicle is getting proper heat, you more than likely do not have a heater core leak. Are you smelling a sweet smell, like antifreeze coming out of the vents? Try running the defroster on high with your window cracked and see if that gives you better results.
Thank you!
-BDP
I have a 2001 Dodge Caravan. In the last few days I have noticed a small puddle on the driver side floor, smell anti-freeze when I turn on the heater, have fogged up windows and only slight heat. Does that sound like a heater core leak? Which of your products will correct that problem? Will it clog up the thermostat?
Richard-
Thank you for asking about your Dodge Caravan. Based on your description, it does sound like you are experiencing a heater core leak. We recommend using the BlueDevil Head Gasket Sealer http://store.gobdp.com/head-gasket-sealer-38386/. The product does not contain any solid or particulate matter, so it is a non-clogging product. Also, as per the directions, you will be removing your thermostat and performing a cooling system flush prior to using the product. Feel free to contact our technical support line at 888-863-0426 with any other questions.
Thank you!
-BDP
My daughter has a 97 sebring convertible and the heater(and defroster) have stopped working. Is itworth a try to use a Blue Devil product to help the problem? I am disabled and not able to crawl around under the dash and so on. Thank you DW
Dennis-
Thank you for asking about your daughter’s Chrysler Sebring. Are you noticing a loss of water/coolant? Please contact our technical support line at 888-863-0426 so that we can get a better understanding of the vehicle’s condition and be able to make any appropriate recommendations.
Thank you!
-BDP
I have two Volkswagens, both with heater core issues. The first is a 2004 b5 Passat in which I use G12 coolant. There’s no puddles and the coolant level doesn’t seem to be decreasing, but the heat does not work and the Windows are fogging badly. Would Blue Devil be safe to use with G12 coolant?
The second vehicle is a 1997 mk3 Jetta. This car has no discernable leak, but the coolant level sometimes slips below normal, there is a smell of antifreeze in the cabin, and the heat works but doesn’t get very warm.
Would your products help in these cases?
Matti-
Thank you for asking about your Volkswagen Passat and Jetta. BlueDevil Pour-N-Go Head Gasket Sealer is safe to use with G12 coolant and would be able seal a heater core leak, however, it would not be appropriate to use the product if you are not experiencing a leak. Based on your description, it does not appear that either of your vehicles are experiencing leaks. Please contact our technical support line at 888-863-0426 so that we can get a better understanding of the vehicles conditions and be able to make any appropriate recommendations.
Thank you!
-BDP
I have a classic 1973 Mercedes 280 that developed a small leak in the heater core. Would this product work to fix it or is the car too old/fragile?
Pat-
Thank you for asking about your Mercedes 280. As long as the vehicle will maintain idle for a full 50 minutes, and you are not losing more than about a quart of water/coolant during that 50 minutes, you would be a great candidate for the BlueDevil Head Gasket Sealer http://store.gobdp.com/head-gasket-sealer-38386/. Be sure to follow the cooling system capacity table on the back of the bottle to add the recommended amount of the product.
Thank you!
-BDP
Hi, I have a 2006 dodge stratus sxt and I do believe that I have a leak in my heater core. My coolant level seems to be fine, and I don’t smell or see the “green” any antifreeze in the cabin, but i do smell it when i exit the vehicle. Now I dont see any visual spots when I move my car, but my driving window does fog up, and there is a slight dampness in my passager side floor. I do have heat, but it goes in and out at times. My car never goes beyond the mid mark on temperature gauge, and am just confused on what to make of it.
Sharon-
Thank you for asking about your Dodge Stratus. Based on your description, it does seem like your vehicle has the symptoms of a heater core leak, although, it is odd you are not noticing a loss of water/coolant. We recommend taking the vehicle to a certified ASE mechanic for a proper diagnosis. If it turns out the heater core does indeed have a leak, you would be a great candidate for the BlueDevil Head Gasket Sealer http://store.gobdp.com/head-gasket-sealer-38386/. Feel free to contact our technical support line at 888-863-0426 with any other questions.
Thank you!
-BDP
I have a Mercedes 2008. Sometimes when I put the heat on I smell the sweet antifreeze other times I do not. No moisture that I can tell and I’m not losing coolant. Will this product seal a potential leak that could be starting? If so which sealant should I use?
Ross-
Thank you for asking about your Mercedes. The products would only be recommended for water/coolant leaks. It should not be used as a preventative measure or preventative maintenance. Based on your description, we would not recommend using the product in this case. Feel free to contact our technical support line at 888-863-0426 with any other questions.
Thank you!
-BDP
I have a 2001 dodge ram 1500 5.2 engine would the bluedevil work for my minor heater core leak and do I have to drain my radiator?
Christopher-
Thank you for asking about your Dodge Ram 1500. Yes, the BlueDevil Head Gasket Sealer http://store.gobdp.com/head-gasket-sealer-38386/ would seal your heater core leak. You would be removing the thermostat and performing a cooling system flush prior to using the product. Feel free to contact our technical support line at 888-863-0426 with any other questions.
Thank you!
-BDP
I have a 2001 VW Passat. Has very hot heat when heather is on high and has a smell and foggy Windows. Looks like coolant level is going down slightly. Would it be harmful to use blue devil and is a radiator flush and removing the thermostate necessary
Ted-
We recommend applying 16 ounces of BlueDevil Head Gasket Sealer to your VW to stop any coolant loss. It is 100% safe and compatible to use in your Passat.
Feel free to contact our tech support team at 888-863-0426 with any questions.
Thank you!
-BDP
I have a 1988 3/4 ton Chevy pu .It is leaking from under the head into the manifold. It over heated. The block my be cracked and/or the heads got hot and maybe warped . What do you recommend besides replacing the engine.
Sandra-
Please give our tech support team a call at 888-863-0426 so that we can get a full understanding of just how bad the leak is that you are experiencing. This will help us determine whether or not one of our products may be appropriate for fixing the problem.
Thank you!
-BDP
I have a 1998 Audi A4 that has a small leak. About a 1 inch in diameter circle on the pavement after about 6 hours after running in cold weather and the heat turned up in my car. I just had my car in to the shop because it was leaking a lot of coolant and they told me I needed to have my heater core replaced due to the tubes (steel, I believe, part of the heater core) deteriorating. They moved a clamp back on the tubes to try to help with the leak. As I previously stated it is a small leak now. Will this product help me with this matter or is there something else you’d suggest? I would like to avoid the $1100 fix of having the heater core replaced. Any advice is much appreciated! Thank you!
Just doing further research, I think it might be an aluminum tube.
Josh-
Thank you for asking about your Audi A4. Based on your description, we would recommend using the BlueDevil Head Gasket Sealer http://store.gobdp.com/head-gasket-sealer-38386/. As long as the vehicle will maintain idle for a full 50 minutes, and you are not losing more than about a quart of water/coolant, you would be a great candidate for the product.
Thank you!
-BDP