VW Golf 2.0 is overheating after replacing thermostat.
Yesterday, my 2.0 overheated. I got it home, replaced the thermostat today, refilled the coolant, and it is STILL overheating. I have noticed that the two front fans aren't coming on like normal. Are there fuses that work these fans? Are the fans even the problem?
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Re: VW Golf 2.0 is overheating after replacing...
There is a strong possibility that the impellers on the waterpump are broken!!!!. they are made out of plastic and are notorious for breaking. ck this first have seen it countless times. make sure new waterpump has metal impellers.
If engine is overheating, first check and see if you have coolant, add only when engine is cool. If this does'nt work get engine up to temp. then turn on the inside heater if cool air comes out then you most likley will need to replace the water pump.
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Your radiator's core may be constricted with rust particles/debris. Clean and flush the radiator with a heavy duty cooling system cleaner. You'll need to remove the thermostat temporarily and follow the directions on the label.
Hold the dealer accountable, for starters! It could be the thermostat, a coolant leak, a severe engine problem, who knows? You shouldn't have to concern yourself with diagnosing and fixing a car you bought yesterday, unless you bought it as-is.
I am having the same problem. I have read that only a GM thermostat may work aftermarket thermostats dont work in some cases. If the top radiator hose is hot and the bottom is is dramatically cooler, then more than likely, the thermostate is not opening. The other part I dont know yet is how to purge the system of air. Trying to find that out now. Good luck.
Sounds like you have coolant leak if you are loosing coolant or a bad thermostat. I would replace the thermostat, they run about $10. The other fan is an aux fan and will only run when the a/c unit is on.
this sounds like a thermostat fault, but also could be the sensor switch to the radiator but is more likely the thermostat, it should be located at the front top of engine, follow the top water hose to the engine and you will find the thermostat housing, also just a heads up, these had a problem when first made, according to the known fixes and problems with VW's the hoses corroded inside and started loosing water, this could be wise to get the system presure checked to...hope this helps
CHECK THE HIGHT OF THE HEATER MATRIX IN THE CAB , IF ITS HIGHER THAN THE FILLER/EXPANSION TANK. THEN ITS AN AIR LOCK, LOOK FOR THE HIGHEST PIPE AND SEE IF THERE IS A BLEED VALVE, IF NOT TAKE BOTH PIPES OFF THE MATRIX FEEDS AND FLUSH OUT TO SEE IF IT IS BLOCKED, AND RECONNECT LOWEST PIPE FIRST AND FILL SYSTYM TILL WATER APPEAR FROM TOP AND RECONNECT RUN MOTOR, AND KEEP TOPIN UP