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Return-Path: <13brv3@bellsouth.net> Received: from imf21aec.mail.bellsouth.net ([205.152.59.69] verified) by logan.com (CommuniGate Pro SMTP 4.2b8) with ESMTP id 327522 for flyrotary@lancaironline.net; Tue, 20 Jul 2004 10:19:50 -0400 Received-SPF: pass receiver=logan.com; client-ip=205.152.59.69; envelope-from=13brv3@bellsouth.net Received: from rd ([65.6.194.9]) by imf21aec.mail.bellsouth.net (InterMail vM.5.01.06.08 201-253-122-130-108-20031117) with ESMTP id <20040720141915.TNMG1776.imf21aec.mail.bellsouth.net@rd> for ; Tue, 20 Jul 2004 10:19:15 -0400 From: "Russell Duffy" <13brv3@bellsouth.net> To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] High Temperature Readings Date: Tue, 20 Jul 2004 09:19:22 -0500 Message-ID: <006a01c46e64$8e8fa4e0$6101a8c0@rd> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_006B_01C46E3A.A5B99CE0" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.2627 Importance: Normal In-Reply-To: X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1409 This is a multi-part message in MIME format. ------=_NextPart_000_006B_01C46E3A.A5B99CE0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Should I use sealant or Teflon tape on the threads of my sender? Do not use sealant (including Teflon tape or plumbers pipe dope) on the threads of temperature or pressure senders. This will not allow the sender to properly ground itself to the engine and will cause the temperature to register high and the pressure to register low. This does not include floating ground senders which include a second terminal specifically for grounding. I just don't buy this. Most sensors are pipe thread, which are made to get tighter as you screw them in. No Teflon tape, or sealer in the world is going to keep that sensor from making metal to metal contact. "Maybe" it could be a problem with a straight thread sensor, using an O-ring seal. I still doubt it though. If in doubt, put an ohmmeter between the sensor body and the housing that it's screwed into. Cheers, Rusty (sealer on everything) ------=_NextPart_000_006B_01C46E3A.A5B99CE0 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Message

Should I use sealant or Teflon tape on the = threads of my=20 sender? Do not use = sealant=20 (including Teflon tape or plumbers pipe dope) on the threads of = temperature or=20 pressure senders. This will not allow the sender to properly ground = itself to=20 the engine and will cause the = temperature to=20 register high and the pressure to register low. = This does=20 not include floating ground senders which include a second terminal = specifically=20 for grounding.

I just don't=20 buy this. Most sensors are pipe thread, which are made to get = tighter=20 as you screw them in. No Teflon tape, or sealer in the world = is going=20 to keep that sensor from making metal to metal contact. "Maybe"=20 it could be a problem with a straight thread sensor, using an = O-ring=20 seal. I still doubt it though. If in doubt, put an ohmmeter = between the=20 sensor body and the housing that it's screwed into. =

Cheers,

Rusty (sealer=20 on everything)
=

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