Okay, took a mirror last night and looked under the exhaust manifold. Found the
block heater but no temp sensor.
Finally had an AH HA moment and looked under the INTAKE manifold and there it
was, right where Fred suggested it would be. I don't know why it was stuck in
my head that the sensor would be under the exhaust manifold which is of course
a dumb place for it.
So I pulled the plug and hosed both the plug and the sensor with Deoxit,
snapped it back together and left it overnight.
This morning it was MUCH better behaved. Temp never got much over 100C and
basically stayed at about 90C until I ran the AC.
I'll call that one a win. The best kind of fixes are the kind that cost nothing.
-Curt
Date: Tue, 14 Aug 2012 20:29:39 -0700 (PDT)
From: Frederick Moir <fredy4.s...@yahoo.com>
To: Mercedes Discussion List <mercedes@okiebenz.com>
Subject: Re: [MBZ] High temp, bad sender?
Message-ID:
<1345001379.54957.yahoomail...@web125001.mail.ne1.yahoo.com>
Content-Type: text/plain; charset=iso-8859-1
Curt.
Drivers side under the manifold about middle of the head, just above the
block/gasket division.
There is an hex boss that the sensor screws into.
Of course I've been watching "Looney Tunes" again. Why do you ask?
?
Fred Moir
Lynn MA
Diesel preferred.
>________________________________
> From: Curt Raymond <curtlud...@yahoo.com>
>To: Diesel List <mercedes@okiebenz.com>
>Sent: Tuesday, August 14, 2012 9:56 PM
>Subject: Re: [MBZ] High temp, bad sender?
>
>The continuing saga:
>
>I wondered if grounding one end would send the temp gauge high so I took a
>jumper wire out with me. Fred had it backwards, the passenger side temp sensor
>is in charge of the aux fan, the top side one is for the electo-magnetic fan
>clutch. I can actuate either by grounding its associated connector with my
>ground wire but neither affects the gauge at all.
>
>Does the system compares the output of the two to control the gauge? I didn't
>think to ground both of them, I'd need to make up another jumper wire.
>
>The wire to the aux fan sensor has something wrong with it, I can turn the fan
>on by wiggling the connector, I can't do the same with the fan clutch sensor.
>Fortunately the wire is a jumper, it goes into the loom over by the fuel
>filter. It does look like the connector comes apart, when I have more time
>I'll see whats up with it. I'll also email Rusty, it'd be great if I could
>just buy a replacement... Anybody got a 201 parts car?
>
>-Curt
>
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