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Compression

Tiny
RAINEDOUT2000
  • MEMBER
  • PLYMOUTH
I was given a 1973 plymouth valiant. I checked the compression from front of the engine to the back was 90, 90, 90, 0, 90, and 155. What could be the problem?
Friday, March 10th, 2006 AT 8:03 PM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,192 POSTS
The engine is worn out. It needs to be rebuilt. The 90 PSI is very low, 155 PSI is normal, and the 0 PSI concerns me. It could be a bent or stuck valve, a hole in the piston. You need to pull the head off to check for the cause.

Let me know what you find and we'll go from there.

Joe
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Sunday, March 22nd, 2009 AT 1:45 PM

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