quattro digest, Vol 1 #4723 - Plastic Radiator Temp Sensor Threads

[Larry C Leung]

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> From: auditude at cox.net
> To: 200q20v at audifans.com, quattro at audifans.com,
> spsherm at attglobal.net
> Date: Sun, 16 Mar 2003 10:10:43 -0700
> Subject: re: Radiator Temp Sensor
>
> Well, I thought the metal-to-metal contact between the sensor and
> the old tank was part of
> what helped it determine the temperature it was measuring.

Coolant in contact with the extended center pin, which sticks
further into the coolant tank in the radiator.


>
> But since there's not much that can be done about that, I was
> thinking that perhaps a
> rubber gasket or o-ring could be sourced from the local hardware
> store.  That way it should
> definitely seal with stripping out the threads.

How about teflon pipe tape? It's part of what it's meant for, and
it should be able to handle the temp. Check the package to be
sure. You'd want to verify it's ability to handle temps of 300 degrees
Fahrenheit, JUST to be certain.


>
> I guess the sensor doesn't ground through the threads then, if they
> are plastic and the
> sensor still works?
>

As I recall, (too bad, I was just under the car earlier) there were two
wires that lead from the sensor, one of which is the ground. Don't
forget,
the radiator is mounted on rubber isolators. So, it's essentially
ungrounded
anyway.

LL - NY
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