Thread: engine compression

Tweet

Hello all and hoping all of you are having a good year.

I pulled my engine to replace some freeze plugs I couldn't get to and decided to go thru the engine.

I pulled the carb and removed the plugs hooked up a battery and did a compression check. The engine was cold.

The following is the reading.
1-180, 3-180, 5-180, 7-150, 2-140, 4-170, 6-170, 8-170. Is this accepatable? what do you all recomend?


thanks
leonard

With the engine out,it's easy to pull the manifolds and listen for hissing past the valves while it's cranking. A small hose held to the ear is a big help here.You can also look in the ports and see how much crud is on the valves. If the pressure is going into the crankcase, it's time for rings.

Hello Denny & Pope:

Thanks for the replies! The engine made popping sound at less then 2000 rpm's & the top end was not what it should have been. The plugs looked like it was running rich.
I am planning on pulling right head to replace head gasket. Should I be conserned with the left side?
The engine is fairly new around 4 years old.
thanks again
leonard

Originally Posted by ldameron

Hello Denny & Pope:

Thanks for the replies! The engine made popping sound at less then 2000 rpm's & the top end was not what it should have been. The plugs looked like it was running rich.
I am planning on pulling right head to replace head gasket. Should I be conserned with the left side?
The engine is fairly new around 4 years old.
thanks again
leonard

What kind of engine is this ?

Hello:
It's a chevy. Would a cam be bad in 4 years? I did the left side 2 years ago, had a tuliped valve.

thanks
leonard

Originally Posted by ldameron

Hello:
It's a chevy. Would a cam be bad in 4 years? I did the left side 2 years ago, had a tuliped valve.

thanks
leonard

What size engine SB/BB ? You may be better off Buying a pair of rebuilt heads . And your cam may have some flat lobes .

Originally Posted by DennyW

Sounds like a Chevy motor condition to me.

ARE YOUR PMs WORKING ? ?

Hello:

It's a sbc and has never been run hot. The shop that did my work said it has been a problem with sbc.
thanks
leonard