Hi all,

1985 GM 2.8L V6 someone knows the compression values of this engine ?
thank you

Giacomo

 

http://bfy.tw/B0tb



I'd say anything above 130 with no 2 cylinders different would be good..

 

Thank you diskman,
but I seem to have read that the compression rate should be 150 , am I wrong ?
Giacomo

 

I think gas will fire at 15psi anyway. I wouldn't worry about the numbers really. Just make sure that no 2 adjacent cylinders are lower than the rest.

Anything over 120 with that old of an engine would be fine I think. Do a dry test then a wet test. Valves will also play into your compression test.

Why the concern over compression numbers? Bad headgasket you think?

 

A gas/air mixture will fire at 0 PSI.

It's not about whether or not it will fire. It's about whether or not there is something wrong with the engine.

 

Check this link out.

http://easyautodiagnostics.com/gm/2....-compression-1

 

Thank you Jimbo Slice
good link

Giacomo