Freemasm
Well Known Member
Trying not to clutter someone else’s thread.
Maybe I was taught wrong a long time ago. I always thought that piston rings were supposed to rotate, continually over time during operation. This is stated in a lot of text books but none were specific to GA PPs. If they didn’t, it could lead to problems. Made sense to me.
In another thread, somone’s jug had a badly fouled lower plug and oil visible via bore scope. No direct evidence of stuck rings and i believe a flush was performed. The culprit was determined to be ring gap alignment.
So the usual arguments; oil ring versus compression ring duties, related effects manifesting in compression tests versus oil consumption, etc being acknowledged. Will a jug removal with ring reclocking have a real long term effect? Of course the “repair” action could remedy a different culprit as a consequence.
Get me smarter. Anybody?
Maybe I was taught wrong a long time ago. I always thought that piston rings were supposed to rotate, continually over time during operation. This is stated in a lot of text books but none were specific to GA PPs. If they didn’t, it could lead to problems. Made sense to me.
In another thread, somone’s jug had a badly fouled lower plug and oil visible via bore scope. No direct evidence of stuck rings and i believe a flush was performed. The culprit was determined to be ring gap alignment.
So the usual arguments; oil ring versus compression ring duties, related effects manifesting in compression tests versus oil consumption, etc being acknowledged. Will a jug removal with ring reclocking have a real long term effect? Of course the “repair” action could remedy a different culprit as a consequence.
Get me smarter. Anybody?
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