Has anyone looked at the piston ring grooves and The rings themselves to make sure
They are within tolerances and fitted correctly. Most rings have very specific
Beveled edges etc and must be laid right. Last year I managed
And built a 16 ltr Caterpillar diesel on an offshore crane with a Caterpillar
Engineer and I had to correct him on this point. Also are the bores new or refurbed
Have they tried moving the cylinder to a different position to see if the problem
Moves which could suggest crankshaft or crankcase misalignment and would the
Previously good cylinder moved to the bad position replicate the fault.
Is the crankcase,crankshaft New or from the incident engine.
You say they did a borescope inspection. If that was on an assembled engine
That would not show another possibility which is a broken piston ring, quite common.
On a rebuilt engine. This would explain, noise, plug fouling and may only cause
Slight compression loss.
Lots of possibilities.
Regards
Last edited by RINKER; 13th Feb 2017 at 22:39.