Usually the tank cracks around the sensor hole.  So when the sensor pops
out the tank is usually done at that point (unless it is a new tank with
a used sensor).  I always recommend folks replace the sensor ($9) with a
new tank ($29), that way they are both new and will seal properly.  Also
if your tank is yellow or tan in color you should check the area around
the pressure cap.  Almost every 2.1l Vanagon that comes in here has a
crack in the expansion tank running from the pressure cap area towards
the sensor area.  At this point the tank should be replaced
immediately.  We have OE tanks and good quality aftermarket sensors in
stock if you need one.

Ken Wilford
John 3:16
www.vanagain.com

kevin obrien wrote:

>Hello All:
>
>My 1990 Carat has been leaking coolant after long
>uphills. Tonight I noticed the Coolant Expansion Tank
>Sensor is loose...it popped out.  I'm waiting for it
>to cool before I push it back in.
>
>Is it suppose to screw in or is it push in? Its got a
>rubber o-ring around the base.
>
>Looking for answers as i have to get back on the road.
>
>Cheers!
>Kevin
>
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