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VW Polo Classic 1.6 2003 overheating

Hi, My car overheats. I bridged out the thermostat switch on the radiator so the radiator fans always run, but the car was still overheating. I pulled out the small pipe on the water bottle and let the car run to see if the water pump is working. The water trickled out slowly. Is the thermostat faulty and if so, how do I access it? My brother told me over the phone that it is below the water pump which is kind of below the alternator and behind the aircon. I can see a thick water pipe running from there into the bottom of the radiator but I don't know how to access it. Thanks!

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6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

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chiquititas
  • 1010 Answers

SOURCE: VW Polo Classic 1.6 Radiator fan not going on

Try moving the fan blades by hand to see if the fan spins freely to see if the problem is frozen bearings in the fan motor. Replace the fan motor if it doesn't turn. If it spins freely disconnect the wires and hook the fan directly to the battery using a jumper. If it runs the problem is most likely the thermostatic switch. If it doesn't the fan motor is bad.

Posted on Jul 03, 2008

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HondaAl
  • 72 Answers

SOURCE: bottom radiator hose cold. upper radiator bulging.

The fan won't come on because the thermoswitch is in the bottom of the radiator, without coolant flow the switch never gets hot. Just because a part is new doesn't mean it is good, is the thermostat an aftermarket part ? I would take out the thermostat (leave the gasket) and see if the bottom hose gets warm. If the bottom hose does not get warm, you may have a blockage or bad water pump

Posted on Apr 18, 2009

emissionwiz
  • 76846 Answers

SOURCE: overheating engine in 24 valve 96 ford taurus 6 cyl

the thermostat can be easily changed from up top, the T-stat is located at the engine end of the upper radiator hose under the flange the hose connects to. Make sure u follow manufacturer's cooling system bleeding procedures when you refill after the T-stat is changed out.

Posted on Jun 14, 2009

steve_e_uk
  • 1675 Answers

SOURCE: Overheating Polo

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

Posted on Feb 08, 2010

  • 14036 Answers

SOURCE: car overheating, fan not kicking in, changed fan

REPLACE THE THERMOSTAT.FAN NOT KICKING IN CHECK FAN FUSE AND RELAY.ALSO BAD COOLANT TEMPERATURE SENSOR WILL CAUSE NO FAN OPERATION IF FAULTY.

Posted on Jun 09, 2010

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Everything makes sens 1..2..3... what is done is OK.When is cold take a cap off the radiator and start engine run until it overflows then put back the cap?see what happened.

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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

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I take it you have the radiator full and the drive belts properly tensioned.
Here is the ordered check list;
1) Get the error codes read-out. Many chain auto part stores will loan a meter to get this for free. Call. They may be mis-leading because of other problems, but may still be useful.
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I believe the temperature sensor that you see displayed on the dash is located on the engine near the heater hose. if everything else checks ok you may check this for false readings.

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Check radiator for coolant (directly, not just from refill reservoir).

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Try moving the fan blades by hand to see if the fan spins freely to see if the problem is frozen bearings in the fan motor. Replace the fan motor if it doesn't turn. If it spins freely disconnect the wires and hook the fan directly to the battery using a jumper. If it runs the problem is most likely the thermostatic switch. If it doesn't the fan motor is bad.

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