[Vwdiesel] normal running temp

[a f]

Similar question...
 
I have a '91 1.6 N/A Jetta and I am thinking the fan is coming on too much. I have had some overheating problems in the past (see archive) and thought I had rid the car of any overheating problems (Coolant flush, changed hoses/heater core, H2O pump,thermostat, and thermoswitch for fan). Car does not currently overheat (read idiot light blinking) and I never lose any coolant anymore but it seems my fan is switching on too much ie. the car always seems to run at the temp when the fan comes on (3/4) even during highway cruising...and when I climb a hill the temp increases and approaches the red (but never activating idiot light). I understand that the actual reading on the gauge doesn't mean squat because they are inconsistent but I am concerned that the fan is being over worked. Simply put while at comfortable cruising speed should the water temp. be where  the fan switches on and off constantly or should the fan only be on when the car is in traffic or pulling a hill? FYI I am in NJ
 so the temp has been hot but not fry an egg hot.
Another way of putting it, should the car, while moving/cruising comfortable (level grade/60 mph) be able to cool on its own (without fan) or is the fan critical for cooling at all times?
 
Thanks
Andrew
 


LBaird119 at aol.com wrote: 
Grab a candy thermometer or what have you, that reads into the 200F 
area. Warm up the car, remove the reservoir cap and put it in. The temp 
in the reservoir will read the coolant temp. You can see what temps are 
what marks, where the fan kicks on, off, etc. 
Most VW and Audi seem to have "normal" beteen half and 3/4. On my 
Quattro there are adjustments for top stop, bottom stop, and a couple on 
the range. There's a nifty adjustable resistance box that the numbers 
relate to little hash marks on the edge of the gauge face. If you have 
the box (or the equivelancies of the settings for resistance) then you 
can calibrate it. The numbers on the box don't corelate directly to 
resistance numbers. :-P Also Bentley seems to have omitted this 
procedure (amognst others) from their copying of the factory manuals.
Loren
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