Re: CD-11’s compression issue

[Don]

This is a shame after all that cosmetic work, for sure….
Are you saying that all these engines showed low compression readings (30-35PSI) before you did the rebuilds? This just seems like too much of a coincidence to me, all four engines worn to the same low compression readings, then getting the same readings after honing and new rings. My first suspect would be your compression gage. Did you check compression on the one engine that ran after you ran it?
What did you use to hone the cylinders, and how much did you hone them? Did you check the ring end gap on the new rings after you honed the cylinders? How well does the one engine run? Start and idle OK?
Again, I suspect a compression gage malfunction.
Please don’t go ripping these engines apart again, until you have confirmed low compression readings with another gage and made more attempts to get them all running….