Before we get to how to fix a coolant leak, let’s talk about why it is important to fix your leak quickly. If your car is leaking coolant, it will run normally until the coolant level gets too low. Once it is low, there will not be enough coolant to keep your engine at the normal operating temperature and the engine will over heat. For more information about the dangers of an overheated engine, read our blog here: https://gobdp.com/blog/car-overheating/
Fixing your coolant leak quickly will ensure your vehicle has the proper coolant level to stay cool and safe. Coolant leaks can come from a variety of places in your vehicle and where the leak is will dictate the best solution.
Possible Coolant Leak Locations:
- Heater core
- Head gasket
There are at least 4 hoses associated with the cooling system in your vehicle, but possibly many more. There will be a hose that carries coolant from the bottom of the radiator into the water pump and another hose that carries coolant from the top of the engine back to the radiator. There will also be hoses that carry coolant to and from the heater core, which is most likely located under your dashboard so the hoses will travel from the motor back to the firewall, or the rear of the engine bay. Overtime due to heat and age the ends of those hoses can become brittle and begin to crack where they are attached causing small leaks. In this case, the best thing to do is purchase a new hose and clamps and replace the broken hose.
The thermostat is usually on the top on the engine, but in cases, as in many Subarus can be located on the bottom of the engine. It’s likely near the water pump and is closed in a housing that is near one of the hoses going to the radiator at the front of your vehicle. This housing is usually bolted on so that it can be easily removed if you need to replace the thermostat. It is possible that the thermostat housing can develop a leak where it is bolted together. In this case, consider replacing the thermostat housing gasket. Since you already will have it apart, consider replacing the thermostat as well since it is a relatively inexpensive part.
As discussed above, your heater core is located under your dashboard near the cabin ventilation fan. Warm coolant from your engine is pumped through the heater core, then your cabin ventilation system uses that to heat the air in the cabin of your vehicle. If the heater core is leaking you will find coolant on the floorboards of your vehicle, most likely on the passenger side. Removing the heater core can be an expensive and tedious job requiring the removal of a significant portion of the interior of your vehicle. To repair the leak in your current heater core use BlueDevil Pour-N-Go. BlueDevil Pour-N-Go is a non-particulate chemical based leak sealer that reacts at the temperature differential created at the leak point in your cooling system. BlueDevil Pour-N-Go will create a chemical weld at the leak permanently sealing the leak in your heater core without expensive removal. Simple add BlueDevil Pour-N-Go to your vehicles radiator and allow up to 2 days drive time for the leak to seal.
If you discover a radiator leak you can repair it by using BlueDevil Pour-N-Go to seal that leak in just the same way. Since your radiator is in the front of your vehicle and a relatively fragile piece of equipment it is no unusual for it to get holes from rocks or road debris. BlueDevil Pour-N-Go can save you from the costly repair of purchasing a new radiator. Pick up BlueDevil Pour-N-Go directly from BlueDevil here.
You can tell if you have an external coolant leak from your head gasket if you discover coolant leaking from bellow your exhaust or intake,(we also have a whole post dedicated to other blown head gasket symptoms). External head gasket leaks must be sealed very quickly as they will expand overtime if they are left untreated. If you have an external head gasket leak use BlueDevil Head Gasket Sealer. BlueDevil Head Gasket Sealer can seal the head gasket leak even in vehicles with large cooling capacities, like V8 engines or truck engines, and is powerful enough to stop even large leaks. You can purchase BlueDevil Head Gasket Sealer here.
BlueDevil Pour-N-Go and BlueDevil Head Gasket Sealer are guaranteed to seal your cooling system leak easily and permanently without costly replacements or mechanics bills. You can purchase any Blue Devil products from our partnering local auto parts retailers like:
- Pep Boys
- Car Quest Auto parts
- O’Reilly Auto Parts
- Advance Auto Parts
- Bennett Auto Supply
- Prime Automotive Warehouse
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