My jetta was running just fine and then began overheating rapidly even when in motion on a cold winter day. fan is working but very loud have discovered loose blade. Was wandering what other problems i should look for since this is my first VW.
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natural for engine temp to rise in Traffic - Until Themostat opens ) cooling fan sensor kicks on fan . But Antifreeze is not just a Cold weather item . Coolant is Absolutely Necessary for Hot Days . You must be full to recovery bottle setting of cold when checked prior to start up . Coolant for your make / model is Reddish - Pink colour and should have a reading of -25 thats negative 25 degrees the Lower the Better even - 50 .. Why ?? - 50 is 50 %% antifreeze / Coolant Concentrate MIX Gives Hot weather cooling Ability or very cold weather starting / winter HEAT .
Then you have a start up problem and it reside with the cold start valve,The cold start valve operates even if the vehicle is warmed up,the cold start valve can be plugged up,or even have a bad connection,The cold start valve operates by a thermotime switch.This switch located on the near bottom of the radiator may have gone bad or disconnected,Here is the easy cost effective route, replace them both,it will cost more to trouble shoot it than just replace it.
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?
Check your coolant (antifreeze/water) level. If it's low, that's your problem. It might me a clogged heater core also. Hopefully just low on water. The fan should run year-round. Otherwise there's a risk of overheating, even in the winter. Good luck.
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