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brent-mueller@comcast.net
Joined: 27 Jul 2007
Posts: 14
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 Posted: Tue Aug 28, 2007 8:21 pm Post subject: Oil Leak |
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-Greetings-
Our valve covers leak some.
what is the very best solution to oil leaking valve covers.
I was told silicon ones are the ones to use, we have cork now.
If cork expands with the warm oil then flattens when not run for a bit, whats th advantage over silcone?
Take Care,
Brent
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moe(at)rosspistons.com
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| Posted: Wed Aug 29, 2007 6:33 am Post subject: Oil Leak |
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Brent,
The silicon, in my experience, are better than cork, however, first be sure
that someone hasn't tightened the screws up so much that the valve covers
are bent around the screw holes. This check can be done with a flat surface
and a feeler gage. If you go to silicon, and do engine oil analysis, be
sure to tell the analyzers. If you don't tell them, likely they will tell
you that the engine is in trouble. Do not over tighten the screws no matter
what type of gaskets you use.
Moe
N680RR
680F(p)
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brcamp(at)windows.microso
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| Posted: Wed Aug 29, 2007 9:40 am Post subject: Oil Leak |
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When I went to silicon valve covers the oil leak problem was greatly
reduced on the GO435s. There were still other leaks around some of the
accessories that had to be dealt with, but it was then possible to
isolate them. Eventually got it down to essentially no leaks.
Bruce
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yourtcfg(at)aol.com
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| Posted: Sat Sep 01, 2007 9:11 am Post subject: Oil Leak |
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Once again Moe, well said. I also recommend replacing all of the screws with correct and new lycoming parts. The screws will come with new lock washeres manufactured on them. They are not expencive. I have tried just about everything over the years and have found the silicone gaskets, properly torqued to flat valve covers using new screws works the best. One last thing, when you install the silicone gaskets, they should be completely dry. No grease, oil or gasket sealer. it will work. jb
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