Low compression in one hole
I am getting ready to check my rod shims for clearance because I have slightly noisy knock when I first start the engine after it sits for a few days.After 15 or 20 seconds or so it goes away, I assume after oil is getting to the rod bearings. Should I be concerned about a 15 lb difference in 1 cylinder? I warmed it up , went through 3 times in each hole,throttle open. Came up with front to back at 75,60,75,70...or, am I over thinking this thing?. It seems to run fine other than that. Just took a 750 mile trip with no issues. Thanks, as usual I appreciate your experience and opinions.
Marc
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