X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Wed, 29 Aug 2007 10:41:59 -0400 Message-ID: X-Original-Return-Path: Received: from imo-m25.mx.aol.com ([64.12.137.6] verified) by logan.com (CommuniGate Pro SMTP 5.1.11) with ESMTP id 2290561 for lml@lancaironline.net; Wed, 29 Aug 2007 00:30:54 -0400 Received-SPF: pass receiver=logan.com; client-ip=64.12.137.6; envelope-from=ASW20747@aol.com Received: from ASW20747@aol.com by imo-m25.mx.aol.com (mail_out_v38_r9.2.) id q.cd1.178f3b38 (52373) for ; Wed, 29 Aug 2007 00:30:14 -0400 (EDT) Received: from FWM-M25 (fwm-m25.webmail.aol.com [64.12.193.227]) by ciaaol-m02.mx.aol.com (v119.7) with ESMTP id MAILCIAAOLM027-cc9546d4f6551ea; Wed, 29 Aug 2007 00:30:14 -0400 X-Original-To: lml@lancaironline.net Subject: Re:More Loose Screws X-Original-Date: Wed, 29 Aug 2007 00:30:14 -0400 X-MB-Message-Source: WebUI X-MB-Message-Type: User MIME-Version: 1.0 From: asw20747@aol.com Content-Type: multipart/alternative; boundary="--------MB_8C9B80C6D9E895E_E10_720F_FWM-M25.sysops.aol.com" X-Mailer: AOL WebMail 30128 Received: from 71.128.52.165 by FWM-M25.sysops.aol.com (64.12.193.227) with HTTP (WebMailUI); Wed, 29 Aug 2007 00:30:07 -0400 X-Original-Message-Id: <8C9B80C6D9E895E-E10-3888@FWM-M25.sysops.aol.com> X-AOL-IP: 64.12.193.227 X-Spam-Flag: NO ----------MB_8C9B80C6D9E895E_E10_720F_FWM-M25.sysops.aol.com Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="us-ascii" I could not see any visible damage to the exhuast valve on my #5 when it ate a screw ?but when tested by the cylinder shop the exhuast valve was leaking due to damage from the screw exiting. Even if the valve was fine the shop ground off all the burrs and high points caused by the screw to prevent them from becoming a source of heat that causes the mixture to ignite early. Preignition ?will quickly ruin your day and the engine. ? Maybe I missed it. Did your friend pull #2 cyl and have it checked and cleaned up? I not an A&P, but I would recommend it. I did the R&R myself for the cost of a few gaskets. The local shop charges a flat $300 for the job. That, plus the cost of any cylinder work is cheap insurance, in my humble opinion. Paul: As far as I know, they did a compression check on all the cyl's and they were all (including #2) above 76/80.? I'm not an expert on this at all, but wouldn't that indicate an intact valve seat(s)? Thanks for you help in originally bringing this to our attention. Erik Larson Legacy N74FX ________________________________________________________________________ Email and AIM finally together. You've gotta check out free AOL Mail! - http://mail.aol.com ----------MB_8C9B80C6D9E895E_E10_720F_FWM-M25.sysops.aol.com Content-Transfer-Encoding: 7bit Content-Type: text/html; charset="us-ascii"
I could not see any visible damage to the exhuast valve on my #5 when it ate a screw  but when tested by the cylinder shop the exhuast valve was leaking due to damage from the screw exiting. Even if the valve was fine the shop ground off all the burrs and high points caused by the screw to prevent them from becoming a source of heat that causes the mixture to ignite early. Preignition  will quickly ruin your day and the engine.
 
Maybe I missed it. Did your friend pull #2 cyl and have it checked and cleaned up? I not an A&P, but I would recommend it. I did the R&R myself for the cost of a few gaskets. The local shop charges a flat $300 for the job. That, plus the cost of any cylinder work is cheap insurance, in my humble opinion.

Paul:

As far as I know, they did a compression check on all the cyl's and they were all (including #2) above 76/80.  I'm not an expert on this at all, but wouldn't that indicate an intact valve seat(s)?

Thanks for you help in originally bringing this to our attention.

Erik Larson

Legacy
N74FX

Email and AIM finally together. You've gotta check out free AOL Mail!
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