Thread: Head gasket Q

Originally Posted by sheerluck

A healthy petrol engine can compress it's exhaust gases up to about 180psi.

If your petrol engine is compressing it's exhaust gas to 180psi, it is anything but healthy. I would suspect the exhaust valves are not opening.
Aaron

Originally Posted by Aaron IIA

If your petrol engine is compressing it's exhaust gas to 180psi, it is anything but healthy. I would suspect the exhaust valves are not opening.
Aaron

Yeah, I don't know why I put exhaust in there. Just "compress" would be correct.