stretched head bolt??

[COMEgetusum]

Im getting pressure into my cooling system some how still have good power still idles fine. It just gets pressure into the system causing it to leak out of the resivour any ideas?

[timmyboy76]

should be pressure...I think your reservoir cap is bad.

[NoRalPh]

I have this cool tester (it's called a Block Check by MrGasket) I use whenever I suspect something like that. What it does is to detect the presence of exhaust gas in the radiator or degas tank, by drawing the air in there, through a liquid that has a color indicator in it.

I don't think they're expensive, mine is 30yrs old and still works great, it sure would ease my mind Buy or borrow one to ease yours!