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fan comes in too late
Beware, it concerns my S4 (1992) chiptuned to 285 HP.
It goes like a rocket although it is about 1600 kg.
The water temp (dashboard gauge) rises above 100 degC (105) before the fan comes in (low speed) I already changed the thermoswitch 2 times but it didn't help.
The gauge itself and its temp sensor seemes to be OK.
Also the wiring is OK. The 2 speeds of the fan are there if you bypass the switch.
With these temp of 25 degC and higher on the highway the gauge stabilizes at about 94 degC. At the traffic lights the temp rises to just above 100 degC (105) and the fan comes in (low speed).
It seemes as if the location of the thermoswitch (right down in radiator) doesn't get warm enough. Could the radiator be blocked ?? With these modern fluids this shouldn't be possible anymore I would think.
The original switch should switch at 95 degC (low speed)and 102 degC (high speed).
As a shortterm solution I bought and modified another switch that should theoretically switch at 88 and 92 degC. Now my fan comes in at exactly 100 degC. I won 5 degC.
Also the cooling fluid and the thermostath were replaced 2 times.
It goes like a rocket although it is about 1600 kg.
The water temp (dashboard gauge) rises above 100 degC (105) before the fan comes in (low speed) I already changed the thermoswitch 2 times but it didn't help.
The gauge itself and its temp sensor seemes to be OK.
Also the wiring is OK. The 2 speeds of the fan are there if you bypass the switch.
With these temp of 25 degC and higher on the highway the gauge stabilizes at about 94 degC. At the traffic lights the temp rises to just above 100 degC (105) and the fan comes in (low speed).
It seemes as if the location of the thermoswitch (right down in radiator) doesn't get warm enough. Could the radiator be blocked ?? With these modern fluids this shouldn't be possible anymore I would think.
The original switch should switch at 95 degC (low speed)and 102 degC (high speed).
As a shortterm solution I bought and modified another switch that should theoretically switch at 88 and 92 degC. Now my fan comes in at exactly 100 degC. I won 5 degC.
Also the cooling fluid and the thermostath were replaced 2 times.
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