I have a 2002 Jetta, 1.8 turbo, 79,000 miles that overheats to 260 degrees if not shut down. The radiator fans do not work unless the AC is on. When driven with the AC on it still overheats rather quickly. Help!
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CHECK TO SEE IF BOTH COOLING FANS RUNNING ARE RUNNING WHEN ENGINE RUNNING START OVERHEATING IF COOLING FANS NOT WORKING CHECK COOLING FANS LARGE FUSES IN THE ENGINE COMPARTMENT OR YOU COULD FAULTY COOLING FANS THERMO SWITCH BOTTOM LEFT SIDE OR RADIATOR.IF COOLING FANS IS WORKING WHILE ENGINE RUNNING.RADIATOR CORES AND HEATER CORE COULD BE CLOGGED.COOLANT SYSTEM NEED FLUSHING. THE THERMOSTAT PARTIALLY CLOSED CAUSE ENGINE OVER HEAT.CHECK WATERPUMP WEEP HOLE IF LEAKING WATER PUMP NEED REPLACING.
Are your fans working? If they're not it will cause overheating while
stationary or in slow traffic. Overheating while driving points to the
radiator. Get some engine flush into the cooling system and run the car for a couple miles. Then let it cool down and remove all the water(Take both large hoses off the radiator). Then stick a hosepipe into the radiator and let the water run until clear. If this doesnt work remove the radiator and have it reconditioned/replaced. Removing the thermostat will not cause the engine to overheat. It just causes the engine to take longer to reach operating temp.
volks 2001 1.8 T wolfsburgh . overheats to dangerous levels just after 2-3 min. of driving . let it cooldown an hour , drove again same thing 2-3 min. noticed fans not working , tried to crank the heaters inside , mostly cold air come in. easy fix or not?
You'll have to remove the radiator (it isn't that hard) and take it to a Yellow Page listed radiator repair shop...Be prepared to spend $200, less if you're lucky...Don't forget to put water pump lube (NAPA #13 - looks like milk) in the radiator after replacing the fluid 50/50 mix
had replaced: both cooling fans, fan control module, coolant temp
sensor, fan switch, 4 terminal connectors. No trouble codes reported in
VW electronic diagnostic test. 2 different VW dealers and and my
mechanic threw in the towel. Any suggestions greatly appreciated."
This is a common problem with the VW..and no one has an answer WHY. (including VW mechanics)
You could change the thermostat and the fan temperature sensor which should be on the radiator. Then top up with a mixture of antifreeze and water pertaining to your location and VW guide lines. If nothing else, this advice will ensure that the thermostat will open and close and that the assuming the radiator fan motor is working, will come on and cool down the radiator.