Hi, I got the cooling system pressure test kit from advance auto. I was wondering whats the most pressure I should I put and how much pressure I need to check the cap. I have a small leak somewhere. Also how would I know if its a head gasket leak theres no coolant in my oil. Ty
Head gasket leaks can be very hard to verify and sometimes pressure testers are inconclusive. You should not exceed the rated cap pressure by more than a pound or two. The cap pressure should be printed right on it.