Low Compression numbers?

[whitehot1]

Here is some good info on leakdown tests and a little on compression tests done by car craft magazine. :smile:

How to do Cylinder Leak Down Testing- Car Craft Magazine

 

[fmster]

i think that the cam is retarded some. What type of timing chain does it have? i know the edelbrock double roller set-up are way off.

Can you explain how and why the edelbrock double roller set is way off,
because I have that set.

 

[turbov6joe]

engine should be at operating temp when you test the compression. yes, those numbers are low even after the rebuild 110 seems low. i have 92000 miles on my car and they are right around 140.

According to the GM service manual this test should be done with a cold motor, 4-5 (max) compression puffs, spark plugs out, battery at full charge and at WOT.

 

[dr_frankenstein]

Thanks guys. The cam issue makes sense to me. I know my rings are not worn after only 1,500 miles.
I think we put this one to rest.
Thanks again.
Now if I can make the car run properly as referenced my other thread that would be great.
http://www.turbobuick.com/forums/general-turbo-buick-tech/268978-car-running-weird-need-suggestions.html

If you greased the crap put of the cylinders when the motor is built i would say your rings are glazed and not sealing.......... can happen in less than 1000 miles...... but not what happened to you...... just a statement.

A.j.