Question about Audi A4

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Cutting out/overheating firstly the problem started i was loosing water and the car over heated. so i used radweld and topped up now that seems to be fine. i went out the other morning and car wouldnt start so i charged the battery all day and now it starts. when i slow down at lights or to go round a corner the car just cuts out. its a 1998 audi a4 2,4 v6 please help

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Bad news if that got hot those cylinder heads dont like that,it could have warped a head,compression test it to see what they are,but my guess is thats going to be expensive..

Posted on Dec 30, 2008

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Overheating could be several problems, usually the thermostat at fault, maybe resolved by cleaning, may need changing.

But water seeping from into the passenger compartment could be a small hole in your heater matrix.

The way I'd go about it is flush the system out and replace the coolant also add something like "Radweld" or "Kseal" to your cooling system. Then give it a good run.

This should block any pin ***** holes you may have.

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Let the vehicle cool down completely and then check the level in the radiator. I bet its pretty low. Top off the radiator with a 50/50 mix of coolant and water. start the vehicle and let it warm up with out the radiator cap on. Keep adding fluid as necessary. While waiting for it to warm up check around for any abvious coolant leaks. Things like hoses, radiator seams, water pump, water inlet/outlet gaskets. If no leaks are found it may be necessary to pressure test the cooling system and even then it might be a slow leak that only occurs when the vehicle is cold.

If the radiator is full than I would suspect that water pump is no longer working or creating enough flow. If the thermostat where stuck you would still get heat. If the water pump is not circulating coolant than you would get no heat and the car would overheat.

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