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engine not firing on all cylinders
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Posted by Mark Riggs on November 17, 2003 at 13:27:53 from (63.165.99.2):
Have a super C with a c123 engine that dosn't seem to be firing on the #3 cylinder. Did a compression check and got around 145 to 149 PSI on all but the #3 that read 125 LBS. Took the plug out of that cylinder and put in a little oil on top of the piston and picked up an additional 10 PSI which I suppose indicates the piston rings are leaking on that cylinder. But should the cylinder fire with 125 PSI of compression? Getting spark there, checked that. Don't really want to do over haul because engine has hair line crack in block behind the water pump area where I understand they are prone to crack. Any suggestions?
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