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From: John Barrett <2thman1@gmail.com>
Subject: Re: [LML] Oil Temp Sensor
X-Original-Date: Tue, 15 Apr 2014 22:17:34 -0700
X-Original-To: Lancair Mailing List <lml@lancaironline.net>


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Thanks to all for the great responses.  Have contacted GRT and am in process=
 of getting a replacement for the sensor.  All advice appreciated and releva=
nt.

Regards,
John Barrett
N31VP

Sent from my iPad


> On Apr 15, 2014, at 5:00 AM, "John Barrett" <jbarrett@carbinge.com> wrote:=

>=20
> Hello,
> =20
> A couple of weeks ago I asked about an oil temp sensor issue with my IVP T=
SIO 550.  I took the prevailing advice that the sensor was unlikely to be th=
e failure point and therefore followed out the connections, replacing the on=
es that were suspect and checking other connectors for contact.  Nothing I d=
id 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 degre=
es when the temp gets around 90 degrees whereas it wasn=E2=80=99t happening u=
ntil about 130 degrees or so =E2=80=93 sometime after takeoff the first few t=
imes it occurred.  The current condition makes it difficult to assure that t=
he 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 th=
an 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 gaug=
e, so I then tried manipulating the wire where it comes out of the sensor pr=
obe and the result was immediate =E2=80=93 85 degrees I think it was.
> =20
> My conclusion is that it is the sensor and the wires coming out of the pro=
be 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 mark=
ings on it that I can find.  I tried hooking it up and the resulting indicat=
ion with warm or cold engine is about 300 degrees.  Same if I reverse the po=
larity.=20
> =20
> With the  existing sensor that I think is failing the oil temp reading nev=
er 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 M=
FDs and feeding Vertical Power.=20
> =20
> Looking in A/C Spruce I am not able to tell what sensor to purchase and I t=
hink that=E2=80=99s what I need.
> =20
> Anyone have an answer?  TCM appears to be inaccessible unless you have an a=
ccount with them?  Is there a way to get a response from them?
> =20
> Thanks,
> John
> =20
> =20

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<html><head><meta http-equiv=3D"content-type" content=3D"text/html; charset=3D=
utf-8"></head><body dir=3D"auto"><div>Thanks to all for the great responses.=
 &nbsp;Have contacted GRT and am in process of getting a replacement for the=
 sensor. &nbsp;All advice appreciated and relevant.</div><div><br></div><div=
>Regards,</div><div>John Barrett</div><div>N31VP<br><br>Sent from my iPad<di=
v><br></div></div><div><br>On Apr 15, 2014, at 5:00 AM, "John Barrett" &lt;<=
a href=3D"mailto:jbarrett@carbinge.com">jbarrett@carbinge.com</a>&gt; wrote:=
<br><br></div><blockquote type=3D"cite"><div><meta http-equiv=3D"Content-Typ=
e" content=3D"text/html; charset=3Dus-ascii"><meta name=3D"Generator" conten=
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<o:idmap v:ext=3D"edit" data=3D"1" />
</o:shapelayout></xml><![endif]--><div class=3D"WordSection1"><p class=3D"Ms=
oNormal">Hello,<o:p></o:p></p><p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p><p=
 class=3D"MsoNormal">A couple of weeks ago I asked about an oil temp sensor i=
ssue with my IVP TSIO 550.&nbsp; I took the prevailing advice that the senso=
r was unlikely to be the failure point and therefore followed out the connec=
tions, replacing the ones that were suspect and checking other connectors fo=
r contact.&nbsp; Nothing I did improved the situation and in fact the oil te=
mp readings I am getting now are beginning to interfere with flight because t=
he temp reverts to 59 degrees when the temp gets around 90 degrees whereas i=
t wasn=E2=80=99t happening until about 130 degrees or so =E2=80=93 sometime a=
fter takeoff the first few times it occurred.&nbsp; The current condition ma=
kes it difficult to assure that the temp is up to 120 degrees prior to takeo=
ff.&nbsp; This is the minimum oil temp I have been advised to take off with.=
<o:p></o:p></p><p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p><p class=3D"MsoNo=
rmal">Today I tried a new experiment.&nbsp; A little while after engine shut=
 down the oil temp gauge was reading 59 degrees and I knew the oil was much w=
armer than that, so I tried disconnecting and reconnecting the wires where t=
he probe attaches to a/c wiring.&nbsp; That made no difference in the readin=
g on the gauge, so I then tried manipulating the wire where it comes out of t=
he sensor probe and the result was immediate =E2=80=93 85 degrees I think it=
 was.<o:p></o:p></p><p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p><p class=3D"=
MsoNormal">My conclusion is that it is the sensor and the wires coming out o=
f the probe have been damaged, so I think I need a new sensor probe.&nbsp; <=
o:p></o:p></p><p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p><p class=3D"MsoNor=
mal">I was given a sensor probe recently that appears to be new but has no m=
arkings on it that I can find.&nbsp; I tried hooking it up and the resulting=
 indication with warm or cold engine is about 300 degrees.&nbsp; Same if I r=
everse the polarity.&nbsp; <o:p></o:p></p><p class=3D"MsoNormal"><o:p>&nbsp;=
</o:p></p><p class=3D"MsoNormal">With the &nbsp;existing sensor that I think=
 is failing the oil temp reading never reads below 59 degrees.&nbsp; In fact=
 when I disconnect the wires, the reading is the same.&nbsp; Is this normal?=
&nbsp; I have the Grand Rapids EAU feeding Chelton MFDs and feeding Vertical=
 Power.&nbsp; <o:p></o:p></p><p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p><p c=
lass=3D"MsoNormal">Looking in A/C Spruce I am not able to tell what sensor t=
o purchase and I think that=E2=80=99s what I need.<o:p></o:p></p><p class=3D=
"MsoNormal"><o:p>&nbsp;</o:p></p><p class=3D"MsoNormal">Anyone have an answe=
r?&nbsp; TCM appears to be inaccessible unless you have an account with them=
?&nbsp; Is there a way to get a response from them?<o:p></o:p></p><p class=3D=
"MsoNormal"><o:p>&nbsp;</o:p></p><p class=3D"MsoNormal">Thanks,<br>John<o:p>=
</o:p></p><p class=3D"MsoNormal"><o:p>&nbsp;</o:p></p><p class=3D"MsoNormal"=
>&nbsp; <o:p></o:p></p></div></div></blockquote></body></html>=

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