Any one know the compression range for good cylinder readings (during compression testing). Mind are #1 230psi, #2 235psi, #3 235psi, #4 215-220psi, #5 235psi #6 240psi. With less than 30k miles. My problem is, excessive oil leakage out the filler cap(qt per week). I'v cleaned the pcv, it was clogged with a heavy substants (looked like petroleum jelly). My guest a water oil mix from condensation or coolant leak. If you put your finger over breather hose for a few seconds and release your can hear a tremendous mount of pressure rush out. I would expect some. Now as long as i run with the breather hose disconnected i have minimal leakage at filler cap, and when engine is up to operating temp smoke(fumes) poors out beather. And when you reconnected breather hose to a clean pvc I'm back to a heavy oil leak out filler cap.

My guest is cylinder #4 is bad which has the lowest compression, But is to low? Or could there be low vaccum from intake manfold side? Boot looked find (no cracks)Engine run smooth intal, after driving for 30 (to work) there a shimmy, rockroll (like the 240)at idle in or out of gear.

Any ideals?

Thanks Tom