Return-Path: Sender: (Marvin Kaye) To: lml@lancaironline.net Date: Fri, 03 Oct 2003 09:54:14 -0400 Message-ID: X-Original-Return-Path: Received: from imo-m06.mx.aol.com ([64.12.136.161] verified) by logan.com (CommuniGate Pro SMTP 4.1.5) with ESMTP id 2622530 for lml@lancaironline.net; Fri, 03 Oct 2003 09:03:22 -0400 Received: from Sky2high@aol.com by imo-m06.mx.aol.com (mail_out_v36_r1.1.) id q.90.3d041eda (18555) for ; Fri, 3 Oct 2003 09:03:13 -0400 (EDT) From: Sky2high@aol.com X-Original-Message-ID: <90.3d041eda.2caecd91@aol.com> X-Original-Date: Fri, 3 Oct 2003 09:03:13 EDT Subject: Re: [LML] Re: Engine mounts LN-2's X-Original-To: lml@lancaironline.net MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="-----------------------------1065186193" X-Mailer: 9.0 for Windows sub 1100 -------------------------------1065186193 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit In a message dated 10/3/2003 6:40:11 AM Central Daylight Time, dpske@wvi.com writes: After a bit of research the following is some engine mount info. On CONICAL Mounts, normally a sleeve is NOT required on most Lyc & Cont. installations. You have a Conical mount if the mount bolts are essentially horizontal. Normal torque for these Lord and most other mount donuts is 45 INCH_POUNDS, not Foot Pounds, since you are torqueing the rubber mounts themselves. If the attach bolts point inwards toward the center of the engine, it's a DYNA-FOCAL Mount and should have a steel sleeve over the bolt and require the torque rated for the bolt. The exotic V-8's and turbines are another matter, hope this clarifys things, Dan.... Dan, Thanks for the info. It has always surprised me on how much special torque information remains obscure. A bolt/torque chart is only a starting point. Something like the Lycoming overhaul manual, with its torque specifications, is an essential reference. Some parts come with torque instructions - some do not. I.E. I found out from a prop shop that the bolts holding the spinner backplate should only be torqued to 22 ft lbs even though the bolt size would warrant a much higher torque. Sometimes a wizened mechanic has a useful rule of thumb - like nuts held from turning with internal star washers should be tightened only until the stars are flattened (and never use a used star washer). Well, we repairmen, nee manufacturers, always have something to learn. Scott Krueger Sky2high@aol.com II-P N92EX IO320 Aurora, IL (KARR) -------------------------------1065186193 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable

In a message dated 10/3/2003 6:40:11 AM Central Daylight Time, dpske@wv= i.com writes:

After a bit of research the following is some=20= engine mount info. On
CONICAL Mounts, normally a slee= ve is NOT required on most Lyc & Cont.
installations. You have a Con= ical mount if the mount bolts are essentially
horizontal. Normal t= orque for these Lord and most other mount donuts is 45
INCH_POUNDS, not=20= Foot Pounds, since you are torqueing the rubber mounts
themselves. = If the attach bolts point inwards toward the center of the engine, it's a DYNA-FOCAL Mount and should have a steel sleeve over the bolt and require the torque rated for the bolt. The exotic V-8= 's and
turbines are another matter, hope this clarifys things, Dan....

Dan,

Thanks for the info. It has always surprised me on how much speci= al torque information remains obscure. A bolt/torque chart is only a s= tarting point. Something like the Lycoming overhaul manual, with its t= orque specifications, is an essential reference. Some parts come w= ith torque instructions - some do not. I.E. I found out from a prop sh= op that the bolts holding the spinner backplate should only be torqued to 22= ft lbs even though the bolt size would warrant a much higher torque. =20= Sometimes a wizened mechanic has a useful rule of thumb - like nuts held fro= m turning with internal star washers should be tightened only until the star= s are flattened (and never use a used star washer). Well, we repairmen= , nee manufacturers, always have something to learn.

Scott Krueger
Sky2high@aol.com
II-P N92EX IO320 Aurora, IL (KARR)

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