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#1
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Engine update, good and bad news
The bad news: There was a welded repair on
the #2 cylinder, right next to the intake valve. Looks like the stress around the repair warped either the valve stem or the valve guide. There was no scoring on the cylinder walls and the rings were intact, and it was apparent that oil was coming in through the valve. A lot of coking on the cylinder head, piston face, and intake valve. The valve was also pretty tight in the guide, I had to tap it with a hammer and drift to get it out. There was some scoring on the interior of the valve guide too. Looking for a new cylinder now. The good news: It didn't let go in flight and gave me plenty of warning. The inside of the case, cam, and tappets look good and there doesn't appear to be any metal in the engine. It could've been a lot worse. Plus, now I've got more time to pack :-P And a cool new lamp base and paperweight. Dave 'lampshade' Hyde RV-4 AOG at 24 hours, EAA tech couselor |
#2
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Nothing nicer than actually finding the problem....much better than tearing
everything apart and not finding anything wrong!! -- Pianome |
#3
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Nice job on tracking it down. Even nicer job in having the good sense to
stop flying and find the problem instead of just waiting for something to break. Pete |
#4
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In article irWCc.115713$Sw.29540@attbi_s51,
"Pete Schaefer" wrote: Nice job on tracking it down. Even nicer job in having the good sense to stop flying and find the problem instead of just waiting for something to break. Pete It is far better to find the problem than to have it find you! |
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