X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml Date: Sun, 13 Dec 2009 17:37:27 -0500 Message-ID: X-Original-Return-Path: Received: from omr17.networksolutionsemail.com ([205.178.146.67] verified) by logan.com (CommuniGate Pro SMTP 5.3c3) with ESMTP id 4018512 for lml@lancaironline.net; Sun, 13 Dec 2009 12:54:58 -0500 Received-SPF: none receiver=logan.com; client-ip=205.178.146.67; envelope-from=steve@oasissolutions.com Received: from mail.networksolutionsemail.com (mail.networksolutionsemail.com [205.178.146.50]) by omr17.networksolutionsemail.com (8.13.6/8.13.6) with SMTP id nBDHsP5h014623 for ; Sun, 13 Dec 2009 12:54:25 -0500 Received: (qmail 14406 invoked by uid 78); 13 Dec 2009 17:54:21 -0000 Received: from unknown (HELO main) (steve@oasissolutions.com@24.5.211.60) by ns-omr1.lb.hosting.dc2.netsol.com with SMTP; 13 Dec 2009 17:54:21 -0000 From: "Steve Richard" X-Original-To: "'Lancair Mailing List'" References: Subject: RE: [LML] Re: Torque for Engine Mount Bolts X-Original-Date: Sun, 13 Dec 2009 09:54:17 -0800 X-Original-Message-ID: <76EB06E09B644FBCA26DE1F138C5E7A8@main> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_000C_01CA7BDA.3C7862D0" X-Mailer: Microsoft Office Outlook 11 Thread-Index: Acp8GjJlJRYaFt7KRL6/1h+rURKlCQAAsS2A In-Reply-To: X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.5579 This is a multi-part message in MIME format. ------=_NextPart_000_000C_01CA7BDA.3C7862D0 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit I would contact Lancair. If I remember poorly, the torque required is lower than the bolt will take. You may crush the firewall. Steve _____ From: Lancair Mailing List [mailto:lml@lancaironline.net] On Behalf Of Sky2high@aol.com Sent: Sunday, December 13, 2009 9:32 AM To: lml@lancaironline.net Subject: [LML] Re: Torque for Engine Mount Bolts Michael, The bolt should be torqued to a value specified for the bolt size. Thus, the preload will be correct for the specified bolt. While your mechanic may be right about the blanket compressing, there are other considerations. Heated Fiber glass and carbon fiber can flow a bit over time - this can cause some loosening and these bolts should be checked at each annual condition inspection. Another problem could be if more three threads show outside the nut - it is possible to torque the nut onto the bolt shoulder at the end of the threads so that it cannot tighten the parts it is fastening any more. Scott Krueger In a message dated 12/11/2009 12:42:03 P.M. Central Standard Time, mnewman@dragonnorth.com writes: The engine mount bolts on my IV-P (through the firewall) spin fairly freely when I turn them with a socket and my fingers. Does anyone have the proper torque values for these bolts? Any ideas why they might have loosened up? I have a mechanic saying that the fireproof blanket compresses over time and that this is why they loosen. _____ Michael Newman Dragonnorth Group 401 Sandy Valley Road Westwood, MA 02090 Cell: 617 821-4608 Home: 617 566-7975 Fax: 617 566-7975 www.dragonnorth.com mnewman@dragonnorth.com ------=_NextPart_000_000C_01CA7BDA.3C7862D0 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable
I would = contact=20 Lancair.  If I remember poorly, the torque required is lower than = the bolt=20 will take.  You may crush the firewall.
 
Steve

From: Lancair Mailing List=20 [mailto:lml@lancaironline.net] On Behalf Of=20 Sky2high@aol.com
Sent: Sunday, December 13, 2009 9:32=20 AM
To: lml@lancaironline.net
Subject: [LML] Re: = Torque for=20 Engine Mount Bolts

Michael,
 
The bolt should be torqued to a value specified for the bolt = size. =20 Thus, the preload will be correct for the specified = bolt.  While=20 your mechanic may be right about the blanket compressing, there are = other=20 considerations.  Heated Fiber glass and carbon fiber can flow a bit = over=20 time - this can cause some loosening and these bolts should be checked = at each=20 annual condition inspection.  Another problem could be if more = three=20 threads show outside the nut - it is possible to torque the nut onto the = bolt shoulder at the end of the threads so that it cannot tighten = the parts=20 it is fastening any more.
 
Scott Krueger
 
In a message dated 12/11/2009 12:42:03 P.M. Central Standard Time,=20 mnewman@dragonnorth.com writes:

The engine mount bolts on my IV-P (through the = firewall)=20 spin fairly freely when I turn them with a socket and my = fingers. =20

Does anyone have the proper torque values for = these bolts?=20

 

Any ideas why they might have loosened up? I have = a=20 mechanic saying that the fireproof blanket compresses over time and = that this=20 is why they loosen.

 

Michael=20 Newman

Dragonnorth=20 Group

401=20 Sandy Valley Road
Westwood, MA = 02090

Cell:=20 617 821-4608
Home: 617 566-7975
Fax: 617=20 566-7975

www.dragonnorth.com

mnewman@dragonnorth.com

<= /TBODY>

 

 

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