There are several statistics indicating that the majority of problems around a check engine light are related to a leak. This mystery leak proves a serious challenge with mechanics detecting the source. Mainly because where the drip falls may not be the home of the leak.

If coolant is dripping from under your vehicle, but you can’t tell where it originates, then you may add a UV dye to the cooling system. Simply add dye, run the engine and then spot out the UV light to map you to Mother Ship Leak. This can be helpful for finding leaky freeze plugs or radiator pinhole leaks.

SURE SIGN BAD HEAD GASKETS/CRACKED HEAD OR BLOCK

 If an engine is using coolant and overheating

 Coolant leak evidence is a mystery while overheating

If you answered “yes” to above then it’s likely an internal leak. In this case, a cooling system pressure tester may be an alibi. This tool hooks up to the radiator cap or coolant reservoir. You hand pump or use shop air to pressurize the system to its normal operating pressure (Northstars usually take 12 pumps regardless to use Blue Devil). And voila, if the cooling system can not hold pressure for 10 minutes then it’s time to consult your buddy “Ole Blue” for sealant magic…

or you can SKIP all the leak detection head aches and….
Pour N Go with Blue Devil and keep your fingers crossed for a miracle!
Sealed leaks happen about 90% of the time so keep the faith!