X-Virus-Scanned: clean according to Sophos on Logan.com X-SpamCatcher-Score: 10 [X] Return-Path: Sender: To: lml@lancaironline.net Date: Tue, 15 May 2007 11:08:20 -0400 Message-ID: X-Original-Return-Path: Received: from web62515.mail.re1.yahoo.com ([69.147.75.107] verified) by logan.com (CommuniGate Pro SMTP 5.1.8) with SMTP id 2045418 for lml@lancaironline.net; Tue, 15 May 2007 07:44:17 -0400 Received-SPF: none receiver=logan.com; client-ip=69.147.75.107; envelope-from=charliekohler@yahoo.com Received: (qmail 6974 invoked by uid 60001); 15 May 2007 11:43:28 -0000 DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=s1024; d=yahoo.com; h=X-YMail-OSG:Received:X-Mailer:Date:From:Subject:To:MIME-Version:Content-Type:Message-ID; b=i7vtIWHHO7AotUycAzM0IQp/Cr9iTmDLcxz94WVISQzQ/QwGyLk89dF1gUtbBjMoqmwfbpINip/vwjlpqZVvhkK/7gq7/KV5kFH6CEQ8gvH9UcGBIiGFBMrXz0OzA2u9zfLf7/UhxFcuqVijJNsLEj4HivTWACLDkwcaHcxsOEk=; X-YMail-OSG: 1.H921EVM1mjGQ.BnQTLMcZsHa43g71cQ95OKCGFqzTRGKCIzT_2N2HD3njK53M2Tg-- Received: from [65.33.123.160] by web62515.mail.re1.yahoo.com via HTTP; Tue, 15 May 2007 04:43:28 PDT X-Mailer: YahooMailRC/651.23 YahooMailWebService/0.7.41.10 X-Original-Date: Tue, 15 May 2007 04:43:28 -0700 (PDT) From: Charlie Kohler Subject: Re: [LML] Re: Continental Engine fuel Sys. X-Original-To: Lancair Mailing List MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="0-1883108470-1179229408=:6788" X-Original-Message-ID: <279543.6788.qm@web62515.mail.re1.yahoo.com> --0-1883108470-1179229408=:6788 Content-Type: text/plain; charset=ascii Art Actually-- It's a good hangar "floor" preflight check. There are two drains-usually on left side by the nose gear door (sniffle valve on the right). One, ( the engine driven fuel pump) may drain oil or fuel-- depending which seal is leaking. Fuel is especially bad as it is a precurser to fuel leaking by the oil seal and filling the crankcase. The other drain is the one in the previous post. The fuel manifold drain. Another bad (grounding) sign. A blue stain on the belly or a spot on the hangar floor is a sign. By the way-- a black (oil) spot on ground under sniffle valve on hangar floor is a indicator that intake valve guides are worn. If you pull an intake pipe, you'll find oil inside. Time to think about a top o'haul. Charlie K. ----- Original Message ---- From: Art Bertolina To: lml@lancaironline.net Sent: Monday, May 14, 2007 10:26:56 PM Subject: [LML] Re: Continental Engine fuel Sys. Charlie this sound like it would be a good annual inspection check if it is not already. Art ----- Original Message ----- From: Charlie Kohler To: lml@lancaironline.net Sent: Monday, May 14, 2007 6:29 AM Subject: [LML] Continental Engine fuel Sys. The thread regarding water/vent plugging issue has missed a potential cause of this problem. Having both Left/Right tank selections responding exactly alike would lead me to a common cause. One is-- a slit/crack/porosity in the diaphragm in the fuel manifold valve on top of the engine. If one exists --the engine driven pump will overcome it initially-- but then as leak (crack) enlarges-- it'll require electric pump lo-- then high to keep the engine running. This might be on one flight--or ten. But eventually the diaphragm will not contain the pressure to overcome the spring, closing the valve and the engine will quit. To test--Put a bucket under sniffle valve-- Remove the drain line (rubber hose on bottom of manifold valve) and turn pump on high mixture and throttle in. ANY fuel coming out drain is serious and the valve must be overhauled. Engines stored for long periods are really susceptible to this problem. Charlie K. --0-1883108470-1179229408=:6788 Content-Type: text/html; charset=ascii
Art
Actually-- It's a good hangar "floor" preflight check. There are two drains-usually on left side by the nose gear door (sniffle valve on the right).
One, ( the engine driven fuel pump) may drain oil or fuel-- depending which seal is leaking. Fuel is especially bad as it is a precurser to fuel leaking by the oil seal and filling the crankcase.

 

The other drain is the one in the previous post. The fuel manifold drain. Another bad (grounding) sign.

A blue stain on the belly or a spot on the hangar floor is a sign.

 

By the way-- a black (oil) spot on ground under sniffle valve on hangar floor is a indicator that intake valve guides are worn. If you pull an intake pipe, you'll find oil inside. Time to think about a top o'haul. 

 

Charlie K.



----- Original Message ----
From: Art Bertolina <artbertolina@earthlink.net>
To: lml@lancaironline.net
Sent: Monday, May 14, 2007 10:26:56 PM
Subject: [LML] Re: Continental Engine fuel Sys.

Charlie
this sound like it would be a good annual inspection check
if it is not already.
Art 
----- Original Message -----
Sent: Monday, May 14, 2007 6:29 AM
Subject: [LML] Continental Engine fuel Sys.

The thread regarding water/vent plugging issue has missed a potential cause of this problem. Having both Left/Right tank selections responding exactly alike would lead me to a common cause.  One is-- a slit/crack/porosity  in the diaphragm in the fuel manifold valve on top of the engine.
If one exists --the engine driven pump will overcome it initially-- but then as leak (crack) enlarges-- it'll require electric pump lo-- then high to keep the engine running. This might be on one flight--or ten. But eventually the diaphragm will not contain the pressure to overcome the spring, closing the valve and the engine will quit.  
To test--Put a bucket under sniffle valve-- Remove the drain line (rubber hose on bottom of manifold valve) and turn pump
on high mixture and throttle in. ANY fuel coming out drain is serious and the valve must be overhauled.   
Engines stored for long periods are really susceptible to this problem.
 
Charlie K.

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