Reply With QuoteJoe,
According to GM:
The lowest reading cylinder should not be less than 70% of the highest,
and no cylinder reading should be less than 689 kpa (100 psi).
Perform the test with engine at normal operating temperature, spark
plugs removed, and throttle wide open.
GMdude
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GM / General Motors: cylinder compression on Chevy 229 c.i. V6 (3.8L)
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- 11-15 01:24 AM #1JoeGuest
cylinder compression on Chevy 229 c.i. V6 (3.8L)
I have a 1984 Chevrolet El Camino with a 229 V6. I recently measured the
cylinder compression at 180 p.s.i. (+/- 5 p.s.i) on all 6 cylinders. What
is the ideal compression for this engine?
- 11-15 10:59 AM #2GMdudeGuest
Re: cylinder compression on Chevy 229 c.i. V6 (3.8L)
- 11-15 06:52 PM #3JoeGuest
Re: cylinder compression on Chevy 229 c.i. V6 (3.8L)
I had all 6 plugs out, but the engine wasn't hot. It seems odd that they
would suggest a minimum but not a maximum pressure.
"GMdude" <com> wrote in
Perform the test with engine at normal operating temperature,
- 11-15 09:19 PM #4GMdudeGuest
Re: cylinder compression on Chevy 229 c.i. V6 (3.8L)
Joe,
That is not so odd. It's the minimum psi that is important for the
engine to run. And the difference between the cylinders to run evenly.
GMdude
- 11-23 02:30 PM #5seerayGuest
Re: cylinder compression on Chevy 229 c.i. V6 (3.8L)
Sounds like a lot of carbon buildup on the piston face. the ideal
compression is pretty much anything over 100 psi
"Joe User" <org> wrote in message
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- 11-27 03:13 AM #6JoeGuest
Re: cylinder compression on Chevy 229 c.i. V6 (3.8L)
Is this a bad thing? If so, is it easily correctable?
And 180 psi IS over 100 psi, is that "ideal"?
"seeray" <net> wrote in
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