thats a common problem! im there with ya!

 

I'm having a hard time with your "too much pressure in the radiator" issue. The radiator is supposed to be pressurized. Typically 14-15 psi. Higher performance engines will go higher. I run my '71 with a 20 psi cap. The pressure is what keeps the coolant from boiling.

 

umm... yeah that's what i was thinking. doesn't the cap determine how much pressure stays in the system?
and even if it was high, the pressure in the cylinder is a lot higher than in the rad. system. so the coolant/pressure is not going to force the gasket to break into the cylinder...

 

Not all the time. When piston is on it's way down during the intake stroke, it's pulling air in, therefore at a vacuum.This is less than coolant pressure. The cap is somewhat of a relief valve if you will. Will open andoverflow coolant/steam if you have too much pressure in the system.

 

but i wouldn't think for the split second it's creating a vacuum that it would suck the gasket in.
there's more cylinder pressure than there is vacuum and rad. pressure combined...

 

I guess I read your post wrong. I wasn't saying it would suck the gasket in. I was saying regardless of how the gasket breaks, it will still leak coolant into the cylinder.

 

oh.. i agree with ya there.

 

I agree^^