[T3] Oi Pressure Sensors

[Russ W]

On 2/1/2011 1:40 PM, J. Jonik wrote:
> I have four oil pressure sensors.   One is in the car, but it leaks.
> Two leak...not much but still messy.
> Two don't work the dashboard light.
>
> Is there any trick to stop leaking?  Some heat and pressure maybe? What's inside those things? How do they work?
>
> As for the light...using OHM meter, found no continuity between screw-in end and the electrical tab on top of 2 sensor.     The one that works for the light does have continuity.  (I didn't take the one out of the car. It's light works.)
>

Be sure your have the right pressure sensors.  There are 2 different 
threads that VW used.
Taper thread which is right for our engines.  Then there straight 
thread.  These are mostly for water cooled, and use a copper washer to seal.
Also, there are several different pressure used.
For example, my VW Fox has 2 oil pressure switches.  one is on the oil 
filter mount, and once it makes, it starts a timer.  If the second one, 
on the back of the cylinder head, does not make withing the alloted 
time, then the oil light starts blinking.

There is no way to reseal an oil sender.  Just go buy the right NEW 
switch, and be done with it.  $3-$4 each.

-- 
Thanks,
Russ Wolfe
russw at classicvw.org