X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from ms-smtp-04.southeast.rr.com ([24.25.9.103] verified) by logan.com (CommuniGate Pro SMTP 5.1.10) with ESMTP id 2160635 for flyrotary@lancaironline.net; Thu, 05 Jul 2007 21:41:04 -0400 Received-SPF: pass receiver=logan.com; client-ip=24.25.9.103; envelope-from=eanderson@carolina.rr.com Received: from edward2 (cpe-024-074-103-061.carolina.res.rr.com [24.74.103.61]) by ms-smtp-04.southeast.rr.com (8.13.6/8.13.6) with SMTP id l661eIqn024180 for ; Thu, 5 Jul 2007 21:40:19 -0400 (EDT) Message-ID: <001001c7bf6e$a1086c20$2402a8c0@edward2> From: "Ed Anderson" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Front Cover Oil Passage Date: Thu, 5 Jul 2007 21:40:26 -0400 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_000D_01C7BF4D.19A80FE0" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.3028 X-MIMEOLE: Produced By Microsoft MimeOLE V6.00.2900.3028 X-Virus-Scanned: Symantec AntiVirus Scan Engine This is a multi-part message in MIME format. ------=_NextPart_000_000D_01C7BF4D.19A80FE0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Dave, as best I recall, if you used a front cover gasket, then you = needed to use the white nylon washer and an O ring. If on the other = hand you only used silicon for the outside gasket sealing then you could = get away with just the O ring. It also depends on whether you had any = machining done to the boss the O ring rides in. =20 The oil pressure could be easily be over 100 psi at that location, so I = personally would hesitate to use just silicone sealant due to that. = However, seeing as how Tracy uses the high temp stuff to seal his = exhaust flange, perhaps it will withstand the pressure OK. Ed ----- Original Message -----=20 From: David Leonard=20 To: Rotary motors in aircraft=20 Sent: Thursday, July 05, 2007 9:30 PM Subject: [FlyRotary] Front Cover Oil Passage Looking for help here from the expert rebuilders. I just put the = engine back in after the re-build and used silicone on the front cover = oil passage instead of the o-ring and nylon.... =20 I seem to remember having done that last time, and it worked fine. I = think I did it last time for some sort of good reason, but now I cant = think of any good reason not to use the o-ring. Then in the middle of = the night I realized that the oil pressure there is probably quite high, = and that is mostly a big gap to fill....=20 Do any of you experts use silicone there instead of an o-ring? --=20 David Leonard Turbo Rotary RV-6 N4VY http://N4VY.RotaryRoster.net http://RotaryRoster.net ------=_NextPart_000_000D_01C7BF4D.19A80FE0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
 Dave,  as best I recall, if you  = used a=20 front cover gasket, then you needed to use the white nylon washer and an = O=20 ring.  If on the other hand you only used silicon for the outside = gasket=20 sealing then you could get away with just the O ring.  It also = depends on=20 whether you had any machining done to the boss the O ring rides = in. =20
 
The oil pressure could be easily be over 100 = psi  at=20 that location, so I personally would hesitate to use just silicone = sealant due=20 to that.  However, seeing as how Tracy uses the high temp stuff to = seal his=20 exhaust flange, perhaps it will withstand the pressure OK.
 
Ed
 
----- Original Message -----
From:=20 David=20 Leonard
Sent: Thursday, July 05, 2007 = 9:30=20 PM
Subject: [FlyRotary] Front = Cover Oil=20 Passage

Looking for help here from the expert rebuilders.  I just = put the=20 engine back in after the re-build and used silicone on the front cover = oil=20 passage instead of the o-ring and nylon.... 
 
I seem to remember having done that last time, and it worked = fine. =20 I think I did it last time for some sort of good reason, but now I = cant think=20 of any good reason not to use the o-ring.  Then in the middle of = the=20 night I realized that the oil pressure there is probably quite high, = and that=20 is mostly a big gap to fill....
 
Do any of you experts use silicone there instead of an o-ring?

--
David Leonard

Turbo Rotary RV-6 = N4VY
http://N4VY.RotaryRoster.nethttp://RotaryRoster.net=20
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