What's the average or should I say healthy range of compression in a stock D16Z6? I can't find the info anywhere, just the actual ratio.

Reason I ask is I did a compression test earlier and it's...
Cyl #1: 180psi
Cyl #2: 160psi
Cyl #3: 160psi
Cyl #4: 168psi

Did the test twice got the same numbers, I'm assuming it's around 160psi for a healthy engine and #1 just has a bunch of carbon build up. Motor was rebuilt and had around 80k miles put on it since the rebuild, 194k total miles.

 

Oh and if it is carbon build up in #1, anyone have any cleaner suggestions? I heard some not so good things about Seafoam so I was thinking maybe BG-44k.

 

Bump...

 

I have seen D16's here have around 180psi for the compressions, but that sounds like your engine is pretty healthy with those numbers.