Question about 1997 Audi A4

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No heat how doyou change a thermostat in a 1.8t 1997 audi

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  • robbobking Jan 24, 2009

    checked out back of engine where posting suggested and the thermostat is NOT there could it be at the front of the engine

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Hi my name is Allen!

Before replacing the thermostat, have you check the coolant level, if you have already checked the level, how many miles is on the vehicle. I'm asking because if the thermostat doesn't fix your problem you may have a restricted heater core or even a door problem.

Thermostat replacement; grab the upper radiator hose and follow it to the engine, this is where the thermostat is, take out the to or three bolts and remove the housing, there is no need to remove the hose, next take out the old thermostat and replace it with the new one after cleaning the mating area on the housing and the engine. be extra careful you put the spring side of the thermostat into the engine then put the gasket on and replace the housing, be careful not to tighten the bolts to tight are you will crack the housing, just snug them down enough it will not leak, if you see a leak after tightening then give it another snug.

Fill it with antifreeze 50/50 premix and be sure all the air is out of the system before you replace the radiator cap, let the engine run until the coolant is flowing then replace the cap, thats it.

For further assistance contact me at FixYa!

Posted on Jan 24, 2009

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Don't just look but follow the upper radiator hose from the radiator to the housing. It should be simple to find if you just follow the hose.

Posted on Jan 24, 2009

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Hi and welcome to FixYa,

Offhand, the thermostat is located right on the back of the cylinder head (up at the bulkhead). Do follow top radiator hose back and it would end at the thermostat housing. The housing would look like the image below.
no heat - 279a4e5.jpg
The thermostat would look like this.

Pls post back result(s). Good luck and Thank you for using FixYa.

Posted on Jan 18, 2009

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Go to www.audidiy.com or www.audiworld.com and look in their tech procedures - there's a photo-referenced step by step on how to do it on the 1.8T. For the 2.8 V6, you have to open the car's front end as if you were doing a timing belt - the thermostat is behind the belt. You don't have to remove the timing belt to remove the thermostat, but if you're going that far in, and you haven't just recently done the timing belt service, you might as well spend the money and do it now rather than pay all that labor again later.

Posted on Jan 18, 2009

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THE LINK IS AS FOLLWS :)


DETAILED DESCRIPTION HOW TO CHANGE THERMOSTAT :)


http://forums.audiworld.com/tt/msgs/1304805.phtml



THANKS.

Posted on Jan 18, 2009

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Thermostat is on the back of the cyl head up at the bulkhead, follow top rad hose back and you will find thermostat housing. 

Posted on Jan 18, 2009

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Grab ahold of the top radiator hose, and follow it back to the engine block.
The housing the hose is attached is the thermostat housing.
Remove the bolts, and there is the thermostst.
Remove, replace, and put everything back together.

Posted on Jan 18, 2009

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