River Cruiser
Guru
- Joined
- Jan 25, 2013
- Messages
- 1,357
- Location
- US
- Vessel Name
- Northern Lights II
- Vessel Make
- Bayliner 3870
My Westerbeke wouldn't start at the end of last season after sitting unused for 6+ weeks. Got it winterized and started working on it this season to analyze the problem. Changed fuel filters and bled system, checked glow plugs, pulled injection pump and injectors and sent to rebuild shop. 2 injectors were bad so I thought I had located the problem but no joy. It still wouldn't fire up, so I then purchased a kit to check compression, I didn't think this was a problem because it didn't have excessive blow by. #1 510 psi #2 215 psi & #3 180 psi, I then figured the head gasket was blown between #2 & #3, could hear air hissing during cranking that added to this feeling. Pulled the head and no sign at all of gasket failure, I then removed the generator and hauled home to my sons shop because he has all of my tools now. Tore it down yesterday and found that everything looks very good inside, the bearing inserts look new, cylinders aren't scored, pistons still have machine marks on the skirts. The pistons have 3 compression rings and 1 oil control ring. The problem was all the compression rings were stuck in the grooves on the 2 with low compression and only the top ring on the other piston expanded out of its groove. A little more information #1 had a little rust in the cylinder when the head was removed so at some point it ingested water possibly during cranking.
Now the question for those still reading what are you ideas on the cause of the stuck rings?
Now the question for those still reading what are you ideas on the cause of the stuck rings?