X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from elasmtp-scoter.atl.sa.earthlink.net ([209.86.89.67] verified) by logan.com (CommuniGate Pro SMTP 6.0.9e) with ESMTP id 6828731 for lml@lancaironline.net; Tue, 15 Apr 2014 10:51:51 -0400 Received-SPF: none receiver=logan.com; client-ip=209.86.89.67; envelope-from=colyncase@earthlink.net DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=dk20050327; d=earthlink.net; b=AuNb1+vIaYE7PtX5UUZdqGE/fADqInbXDXTuta1n+7JfvXEoACKq1omMYO2MN2jG; h=Received:From:Mime-Version:Content-Type:Subject:Date:In-Reply-To:To:References:Message-Id:X-Mailer:X-ELNK-Trace:X-Originating-IP; Received: from [71.181.78.226] (helo=[192.168.1.24]) by elasmtp-scoter.atl.sa.earthlink.net with esmtpa (Exim 4.67) (envelope-from ) id 1Wa4hg-0008B7-HQ for lml@lancaironline.net; Tue, 15 Apr 2014 10:51:16 -0400 From: Colyn Case Mime-Version: 1.0 (Apple Message framework v1085) Content-Type: multipart/alternative; boundary=Apple-Mail-65-506939603 Subject: Re: [LML] Oil Temp Sensor Date: Tue, 15 Apr 2014 10:50:50 -0400 In-Reply-To: To: "Lancair Mailing List" References: Message-Id: <85CAF50C-54D6-4CB8-B23E-38092E0A4743@earthlink.net> X-Mailer: Apple Mail (2.1085) X-ELNK-Trace: 63d5d3452847f8b1d6dd28457998182d7e972de0d01da940919ac1fd75d34b648e7652f4b77155f0350badd9bab72f9c350badd9bab72f9c350badd9bab72f9c X-Originating-IP: 71.181.78.226 --Apple-Mail-65-506939603 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=windows-1252 other than the physical connection, the choice of which sensor has more = to do with the EAU than anything else. I would call GRT and order from = them. I assume you have eliminated a faulty ground from the equation? Colyn On Apr 15, 2014, at 8:00 AM, John Barrett wrote: Hello, =20 A couple of weeks ago I asked about an oil temp sensor issue with my IVP = TSIO 550. I took the prevailing advice that the sensor was unlikely to = be the failure point and therefore followed out the connections, = replacing the ones that were suspect and checking other connectors for = contact. Nothing I did improved the situation and in fact the oil temp = readings I am getting now are beginning to interfere with flight because = the temp reverts to 59 degrees when the temp gets around 90 degrees = whereas it wasn=92t happening until about 130 degrees or so =96 sometime = after takeoff the first few times it occurred. The current condition = makes it difficult to assure that the temp is up to 120 degrees prior to = takeoff. This is the minimum oil temp I have been advised to take off = with. =20 Today I tried a new experiment. A little while after engine shut down = the oil temp gauge was reading 59 degrees and I knew the oil was much = warmer than that, so I tried disconnecting and reconnecting the wires = where the probe attaches to a/c wiring. That made no difference in the = reading on the gauge, so I then tried manipulating the wire where it = comes out of the sensor probe and the result was immediate =96 85 = degrees I think it was. =20 My conclusion is that it is the sensor and the wires coming out of the = probe have been damaged, so I think I need a new sensor probe.=20 =20 I was given a sensor probe recently that appears to be new but has no = markings on it that I can find. I tried hooking it up and the resulting = indication with warm or cold engine is about 300 degrees. Same if I = reverse the polarity.=20 =20 With the existing sensor that I think is failing the oil temp reading = never reads below 59 degrees. In fact when I disconnect the wires, the = reading is the same. Is this normal? I have the Grand Rapids EAU = feeding Chelton MFDs and feeding Vertical Power.=20 =20 Looking in A/C Spruce I am not able to tell what sensor to purchase and = I think that=92s what I need. =20 Anyone have an answer? TCM appears to be inaccessible unless you have = an account with them? Is there a way to get a response from them? =20 Thanks, John =20 =20 --Apple-Mail-65-506939603 Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=windows-1252 other than the physical connection, the choice of = which sensor has more to do with the EAU than anything else.  I = would call GRT and order from them.   I assume you have eliminated = a faulty ground from the = equation?

Colyn

On Apr 15, = 2014, at 8:00 AM, John Barrett wrote:

Hello,
 
A couple of weeks ago I asked = about an oil temp sensor issue with my IVP TSIO 550.  I took the = prevailing advice that the sensor was unlikely to be the failure point = and therefore followed out the connections, replacing the ones that were = suspect and checking other connectors for contact.  Nothing I did = improved the situation and in fact the oil temp readings I am getting = now are beginning to interfere with flight because the temp reverts to = 59 degrees when the temp gets around 90 degrees whereas it wasn=92t = happening until about 130 degrees or so =96 sometime after takeoff the = first few times it occurred.  The current condition makes it = difficult to assure that the temp is up to 120 degrees prior to = takeoff.  This is the minimum oil temp I have been advised to take = off with.
 
Today I tried a new experiment.  A little while after = engine shut down the oil temp gauge was reading 59 degrees and I knew = the oil was much warmer than that, so I tried disconnecting and = reconnecting the wires where the probe attaches to a/c wiring.  = That made no difference in the reading on the gauge, so I then tried = manipulating the wire where it comes out of the sensor probe and the = result was immediate =96 85 degrees I think it was.
 
My conclusion is that it is = the sensor and the wires coming out of the probe have been damaged, so I = think I need a new sensor probe. 
 
I was given a sensor probe = recently that appears to be new but has no markings on it that I can = find.  I tried hooking it up and the resulting indication with warm = or cold engine is about 300 degrees.  Same if I reverse the = polarity. 
 
With the  existing sensor that I think is failing the = oil temp reading never reads below 59 degrees.  In fact when I = disconnect the wires, the reading is the same.  Is this = normal?  I have the Grand Rapids EAU feeding Chelton MFDs and = feeding Vertical Power. 
Looking in A/C Spruce I am not able = to tell what sensor to purchase and I think that=92s what I = need.
 
Anyone have an = answer?  TCM appears to be inaccessible unless you have an account = with them?  Is there a way to get a response from = them?
 
 
 

= --Apple-Mail-65-506939603--