Question about 2002 Volkswagen Passat

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Where is my thermostat on a 1.8 vectra c? i have water coming back through my coolant bottle when in traffic, when driving everything seems fine, temperature gauge does not move when driving but shoots up when still untill fan kicks in, please help

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Thats what its supposed to do.if you were loosing power then you would have a problem....also if you have to constantly add water.

Posted on May 13, 2010

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Posted on Jan 02, 2017

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Temperature gauge stays at zero until stuck on traffic then goes to 70 then back down to zero when driving again checked coolant and its fine???


The thermostat housing body needs to be replaced which regulates water coolant through engine to radiator.

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I replaced the thermostat due to overheating. Overheat problem went away for about three days then came back. Overfill bottle was somewhat low. filled the bottle re set computer fine for two days the...


when you topped the system up after the thermostat was changed. did you run the engine with the filler cap off and ran engine till all the air was out and keep topping up till all the air has come out and left to cool before toping up and putting the cap on ???

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Problem with 2004 Pontiac Grand Prix 2004 pontiac gp, new heads, gaskets, coolant, oil, thermostat. still spikes heat. what next?


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2002 ford windstar sel overheating


first check coolant level in radiator coolant level sound low.if coolant overflow jug empty.coolant sysyem low, when add coolant to coolant overflow jug coolant level should stay at full cold mark.if coolant level okay,engine overheat while sitting or moving in slow traffic either coolant fan relay or fuse could be bad.or engine coolant temperature sensor could be bad. coolant sensor turn on cooling fan at certain temperature.hot wire check to make sure cooling fan motor not bad or short in wires.if all is good have pcm check it controls fan relay to through the coolant temperature sensor signal when coolant get hot.

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Yes it is normal just no hot air


1. When setting the temperature to MAX, blower level to FULL and outside air Vent CLOSED, no hot air comes out after 2-5 minutes?
If YES, when did you last flushed your radiator and is it full?
2. if more than 5 years ago, flush radiator system, instructions are usually in Owners manual. Use a bottle of Radiator cleaner, run egine hot for about 10-15 minutes, carefully open petcock in bottom of radiator to flush out radiator, WARNING, careful as flushed coolant would be boiling hot. As sson petcock is open and water start to flow out, carefully open radiator cap to enhance flushing flow. Use garden hose to fill radiator while flushing until water coming out from petcock is cold and clear.
Once clear, start engine, turn heter full and blower full blast and keep hose in radiator flowing full, leave petcock open until clear water flows out again. Once clear waters comes out, turn off engine,turn off garden hose and let water drain empty radiator. Once it stops flowing out, close petcock snug and put radiator cap on, pull off radiator coolant catch bottle, clean bottle for any debris and dirt. Drain any water, leave bottle empty and put it back onto its place.
3. Fill radiator with 1 gallon (4L) of concentrated coolant, top up radiator until full, fill catch bottle with concentrated coolant, start engine and keep it overflowing until no bubbles comes out and the radiator is fully hot. Once it is flowing good, close and connect everything. Drive with it and keep catch bottle filled as necessarry.
Good luck. Give as vote and good comment if this advise solve youor problem. Thank you.

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The humming is the noise the coolant makes when the car overheats and forces open the relief valve in the radiator cap and flows through the small hose to the recovery bottle., it you had all this work this done only 2 things can cause the issue, one is a problem with the cooling fan, the other is a blown head gasket, which I suspect is the problem, before you flushed the system was the coolant rusted?

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