For a while my Audi has been overheating a bit. The temperature gauge is
between 95C an 100C. It is normally stable at 90C. The temperature
quickly goes up in city traffic. I thought it was the thermostat and
planned to replace it this weekend. This morning when I started the car
the generator and the cooling warning lamps did not go out. The
generator belt was not broken, though a little slack. I tightened the
belt and after that the warning lamps did go out. After driving about 15
km the generator warning lamp suddenly started blinking. At the same
time the temperature dropped and I had a vague feeling that something
smelled like it was burned. I stopped the car and checked the generator
belt. It was still tight. Aftar a couple of minutes I decided to drive
home again. Now the temperature was between 85C and 90 C. When I came
home I noticed that one fuse was blown, but it was just a small fuse for
the parking light, so I don't think it is related to the other problems.
Anyone have an idea of what can be wrong? The engine is quite old (over
560 000 km) so maybe it has done its duty and should be replaced?
Start it up and let the car idle while parked. When it reaches normal
operating temperature, the fan should come on. If it doesn't, there's
your problem. If that's the case you then move on to checking the fan
relay and the fan motor itself.
No, the fan should definitely come on when the car is idling after 5-10
minutes since there is no airflow through the radiator (when the car is
not moving) without it. I suspect this is your problem and explains why
the engine runs hot in city traffic.
The fan motor may have siezed bearings and that load caused the fusable
link to blow out (if you have one). If you don't it probably fried the
wiring and caused the smell and alternator loading. It happens often
when miles get up there.
'91 100Q 5spd
Chris Mauritz wrote:
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