Re: engine is out... now what do I do?

Posted by Owen_Dyneto On 2012/5/22 13:02:32

I agree with Jack, the numbers are a bit low and may or may not come up a bit with the engine back in service. But the 2nd test after some squirts of oil may be a bit misleading. If more oil was added than could pass by the rings in a couple of strokes, the excess would occupy volume in the combustion chamber and thus raise the compression pressure. Thus all of that differential between the two readings may not be (and probably isn't) entirely indicative of the ring condition. Depends a bit on how big a "squirt" is. I'd be more concerned with the condition of the lower end.

My own opinion, if the rest of the engine is sound and doing a full rebuild isn't in your plans or wallet at this time, there's nothing in those compression values that would prevent you from having some thousands of miles of enjoyment while you save up for a rebuild later.