X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Fri, 22 May 2009 22:12:36 -0400 Message-ID: X-Original-Return-Path: Received: from asp-3.reflexion.net ([205.237.99.178] verified) by logan.com (CommuniGate Pro SMTP 5.2.14) with SMTP id 3651062 for lml@lancaironline.net; Fri, 22 May 2009 18:10:58 -0400 Received-SPF: none receiver=logan.com; client-ip=205.237.99.178; envelope-from=cberland@systems3.net Received: (qmail 30227 invoked from network); 22 May 2009 22:10:23 -0000 Received: from unknown (HELO asp-3.reflexion.net) (127.0.0.1) by 0 (rfx-qmail) with SMTP; 22 May 2009 22:10:23 -0000 Received: by asp-3.reflexion.net (Reflexion email security v5.60.9) with SMTP; Fri, 22 May 2009 18:10:23 -0400 (EDT) Received: (qmail 30197 invoked from network); 22 May 2009 22:10:23 -0000 Received: from unknown (HELO systems3.net) (98.172.79.178) by 0 (rfx-qmail) with SMTP; 22 May 2009 22:10:23 -0000 Content-class: urn:content-classes:message MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----_=_NextPart_001_01C9DB2A.19C46270" Subject: [LML]Temperature spike X-MimeOLE: Produced By Microsoft Exchange V6.5 X-Original-Date: Fri, 22 May 2009 15:10:21 -0700 X-Original-Message-ID: <87C33F695961494D886EB3B6C8A476515D0518@s3server.Systems3.local> In-Reply-To: X-MS-Has-Attach: X-MS-TNEF-Correlator: Thread-Topic: [LML]Temperature spike Thread-Index: AcnbFcLq24T1wVPvTfafzJU/XKx4ZQAEv3Jg References: From: "Craig Berland" X-Original-To: "Lancair Mailing List" This is a multi-part message in MIME format. ------_=_NextPart_001_01C9DB2A.19C46270 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable Fred, let me add a little tid-bit. While I was at GM (yes the Feds and UAW own them now) we ran a little test. We asked 20 "car type" people to install spark plugs in an engine without a torque wrench. As I remember over half of the spark plugs were torqued above specification. Of those plugs torqued above spec, many had cracked ceramic insulators. Sorry I can't remember the exact numbers but it stuck with me and I always use a torque wrench to install spark plugs. Personally if I take plugs out of an engine, I generally replace them. The break-a-way torque required to remove them is usually pretty high. Craig Berland =20 "The problem was a broken piece of ceramic in one spark plug, too large to fall out." =20 Glowing ceramic leads to pre-ignition or detonation leads to rapid CHT rise. Makes sense to me. =20 =20 Now THAT is a valuable observation we should all tuck away into memory banks. Very observant, Bill.=20 =20 Fred Moreno=20 =20 =20 =20 ------_=_NextPart_001_01C9DB2A.19C46270 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable

Fred, let me add a little tid-bit. While I was at = GM (yes the Feds and UAW own them now) we ran a little test. We asked 20 = “car type” people to install spark plugs in an engine without a torque wrench. As I remember over half of the spark plugs were torqued = above specification. Of those plugs torqued above spec, many had cracked ceramic insulators. Sorry I can’t remember the exact numbers = but it stuck with me and I always use a torque wrench to install spark = plugs. Personally if I take plugs out of an engine, I generally replace = them. The break-a-way torque required to remove them is usually pretty = high.=

Craig Berland

“The problem was a broken = piece of ceramic in one spark plug, too large to fall = out.”

Glowing ceramic leads to = pre-ignition or detonation leads to rapid CHT rise. Makes sense to me. =

Now THAT is a valuable = observation we should all tuck away into memory banks. Very observant, Bill. =

Fred Moreno =

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