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Do i have thermostat issue or waterpump

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Old Feb 9, 2017 | 02:47 PM
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Default Do i have thermostat issue or waterpump

2002 audi quattro a4 1.8turbo dont see water circulating in resivor and heater only blows cold air
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Old Feb 9, 2017 | 04:06 PM
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Originally Posted by nick greene-killam
2002 audi quattro a4 1.8turbo dont see water circulating in resivor and heater only blows cold air
Does your temp gauge stay on cold? If so, It has to be thermostat. Car will overheat if water pump is bad.

One qualification. Is this a really recent problem? Is it REALLY cold there? Is there enough antifreeze in the coolant?
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Old Feb 9, 2017 | 05:05 PM
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Water doesn't "circulate" in the expansion tank, if that's what you mean by reservoir.

After engine running for 15 minutes while driving; is the coolant hose from the top of the radiator hot? If so, good. if not, a blockage or thermostat issue.

If good in previous step, Inspect heater control valve for proper operation. Scan with VCDS. Repair as necessary.
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