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Major Problem - No Compression Cylinder 4!!!

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Old 07-17-2006, 09:51 AM
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Default Major Problem - No Compression Cylinder 4!!!

Took my car to a dealer today and after a $89 diagnostic fee they said there was "no compression in cylinder 4." They want $1330 to pull the head off and investigate whats wrong, this does not include repair costs. Anyone have any alternate suggestions of what i can do to figure out whats wrong?? Anyone had similiar problems like this?
Old 07-17-2006, 10:05 AM
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If it is confirmed that you have a bad cylinder, then it is rebuilt time.
Better to just get another shortblock and go from there.
Old 07-17-2006, 10:10 AM
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what if its just a bent pushrod or valve?
Old 07-17-2006, 11:06 AM
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Then do a leakdown test to confirm.

But in general a bent valve will leak but no show 0 compression.
Old 07-17-2006, 11:10 AM
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btw..the engine has 45k miles on it
Old 07-17-2006, 11:14 AM
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one more thing, it threw a code of P0300 with is a RANDOM misfire, if cylinder 4 has no compression and is constantly misfiring wouldn't it throw a code of p0304, where the 04 is means cylinder 4?




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