Former VWDieselParts.com Forum

Thanks for all the replys...Im pretty certain its not the fan. As I said, it works when I jump the switch and when the AC is switched on.
Also, the thermoswitch will never trigger if coolant is not getting to it, which seems to be my situation.
I really think now that it is the pump.

This problem arose suddenly the other day in my 91 jetta 1.6L: Driving on the highway (65mph) I noticed the temp gauge at the 3/4 mark, when normally it runs right at the center mark. It remained there for the entire half-hour drive. Heater working fine. I got off the highway and was then in traffic...

I bought an adapter to use a dial indicator for setting injection pump timing, only to find that the threaded rod that was included was the wrong diameter, and also the threaded end did not fit my dial indicator. My solution was to use a brass rod, a roll pin, and a short machine screw of the proper...