vlittle
Well Known Member
Since new, my Lycoming IO-540 has erratic compression on the #3 cylinder. Finally, on the advice of the engne builder, on the second annual, I pulled the cylinder.
There was no obvious visual problems with the cylinder, valves or rings. What I did discover, however, was a missing wrist pin end cap. There is no sign of it in the crankcase and no metal in the filter or drained oil.
There is a strong indication that it was never there since new.
My question for the engine experts: could the missing end cap be related to the erratic compression (from 55 to 70/80)?
The cylinder and piston are at the engine builder now for warranty rework, so things are getting fixed.
Cheers,
There was no obvious visual problems with the cylinder, valves or rings. What I did discover, however, was a missing wrist pin end cap. There is no sign of it in the crankcase and no metal in the filter or drained oil.
There is a strong indication that it was never there since new.
My question for the engine experts: could the missing end cap be related to the erratic compression (from 55 to 70/80)?
The cylinder and piston are at the engine builder now for warranty rework, so things are getting fixed.
Cheers,