1985 Audi Coupe GT help.
#12
03-09-2005, 04:02 AM
RE: 1985 Audi Coupe GT help.
There's not a heck of a lot more we need, unless you are going to try a few things, and I don't know your mechanical skills.
If you can introduce 100 lbs or so of compressed air into each cylinder to try to see if you have a leak into the coolant passages, and you will know by the bubbles in the expansion tank, if not by the tank blowing water out the cap, anyhow, if you don't, with a warm engine, one point passed.
The other is the possibly blocked, at least partially, radiator, again, which may have had Stop Leak used in the past, maybe for a heater leak.
Generally, the fan runs at low speed to keep the engine coolant within range, high speed in prolonged traffic in hot weather, high speed when the AC is running in hot weather, no low speed in AC mode, as you are cooling not only the radiator, but the condensor, also, double the thickness of tubes and fins. And at least double the heat to be dissipated.
Well, maybe not double, but you are drawing hot air from the condensor past the radiator to try to cool the radiator, and cooling is by the delta T of the air, and if you are trying to cool a radiator with already hot air, it will not be very efficient.
Come back after you have tried a few things, maybe more help will be available.
Cheers,
George
If you can introduce 100 lbs or so of compressed air into each cylinder to try to see if you have a leak into the coolant passages, and you will know by the bubbles in the expansion tank, if not by the tank blowing water out the cap, anyhow, if you don't, with a warm engine, one point passed.
The other is the possibly blocked, at least partially, radiator, again, which may have had Stop Leak used in the past, maybe for a heater leak.
Generally, the fan runs at low speed to keep the engine coolant within range, high speed in prolonged traffic in hot weather, high speed when the AC is running in hot weather, no low speed in AC mode, as you are cooling not only the radiator, but the condensor, also, double the thickness of tubes and fins. And at least double the heat to be dissipated.
Well, maybe not double, but you are drawing hot air from the condensor past the radiator to try to cool the radiator, and cooling is by the delta T of the air, and if you are trying to cool a radiator with already hot air, it will not be very efficient.
Come back after you have tried a few things, maybe more help will be available.
Cheers,
George
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