Setup in signature. So i have excessive blow by and oil blowin out the intake port of the valve cover. Its not to bad but noticable, and when oil cap is off you can feel the blow by for sure. Heres what i dont get 1) Vacuum is at solid 20 on idle 2) Compression test at 215 across the board. any idea guys?

 

How do you know it is excessive? Any running engine will create a "breeze" just from the crank and pistons moving around. Flap your arms around without making the air move.

Also, water is a by product of combustion. It gets in the oil and when the oil gets hot enough it escapes as water vapor. Depending on the atmospheric conditions it can look excessive too.

If you are confident with your compression tests drop your worry.

Cheers.

 

Do you have a catch can setup?

 

Do a leak down test.

 

sorry about this post, i posted it before i read my last thread, my catch can is installed wrong.