Re: Pulled Head no clue why zero compression in 1 Cylinder

Posted by Ken McWilliams on October 23, 2000 at 09:38:26 from (38.232.245.127):

In Reply to: Pulled Head no clue why zero compression in 1 Cylinder posted by Rick from Paso on October 22, 2000 at 23:09:02:

Rick,

I think you may have gone a little fast for me.
You were able to put compressed air into each cylinder and each held pressure?
The engine, however before tearing down has a miss?
When cranking the engine, the subject cylinder developed compression at or near the other cylinders?
Oil in water and oil in cylinder could be a long term problem, but don't jump to conclusions yet.
If the above are true, then look at dead spark plug and non-acutated exhaust valve.
A dead spark plug will allow fuel and oil to accumulate on top of the piston. Check for spark through the spark plug's gap and then at the end of the wire.
If good spark, check for the exhaust valve properly being actuated. You will get good compression, but will not exhaust if the valve is not properly going up and down. The exhaust valve could be closed all the time which accounts for the no leak-down and good compression value. Cam lobe could be worn off, or bent push rod, or lifter or push rod not properly seated but off to side.

The oil in water could be a bad head gasket that is allowing seepage, but may not have been the reason that it was not running properly.

You may need to put the head back on with the old gasket and finish your diagnosis. Use thick greas on the head gasket as a temporary seal until the diagnosis is completed.

I can't determine your problem until more data and observations are gathered

Ken McWilliams
Dayton, OH

Follow Ups:

• Re: Re: Pulled Head no clue why zero compression in 1 Cylinder Rick from Paso 21:25:31 10/23/00 (1)
  • Re: Re: Re: Pulled Head no clue why zero compression in 1 Cylinder Ken McWilliams 03:54:51 10/24/00 (0)

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