Question about 1988 Audi 90

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I can't find my thermostat in my 1988 Audi 90, needs to be replaced, please help me find it?

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Open the hood,,follow the top radiator hose to the engine,,where the radiator connects to the coupling going into the motor,,this is where the thermostat is (Inside) you have to empty some of the coolant from the radiator,,then take the hose off the coupling, then unbolt the coupling from the engine,,it is aluminum, so be gentle.
Then take the disc like thermostat out from the coupling,,or where it may still be stuck in the top of the motor,,and replace,,,clean both sides of the coupling, and apply sonme gasket sealer,,and new gasket,,then put new thermostat in (the right way) and re-bolt the coupling, and reconnect the hose.
Then fill the radiator with the fluid you took out.. and drive and be happy.

Posted on Jan 19, 2009

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onyeredson
  • 404 Answers

SOURCE: Can't find thermostat location on 1988 Audi 90.

Hi Lol,
I'm not an Audi specialist however if you follow the top hose from the radiator to the engine block the thermostat housing on most engines is at the end, it may have 2 nuts or bolts securing it.
I hope you are now sorted if not please come back to me and I'll try to get my head under the bonnet/hood of a 90 to find what you seek.
Please remember to rate my efforts,
Paul 'W'
Onyer~EDson(:0) {#><U.K.

Posted on Jan 19, 2009

gjermund
  • 13 Answers

SOURCE: Audi 90 1988 timing problems

there wil be a mark on your camshaft, alternator, igniton coil and driveshaft and on the motor block for each one of them, set them over there and then put the timing belt on, still i would take it to a mechanic for this, because if you do this wrong you might break off a valve inside one or more of the cylinders and that would be more expensive then to have it done right the first time.

Posted on Mar 10, 2009

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Click on the below Links.
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The second link is all the Diagrams on the Timing Belt for the V8 Quattro.
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If you follow the radiator hose up from the radiator on the right side it's up where it goes into/behind the cover.

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1 Answer

Audi 90 1988 timing problems


there wil be a mark on your camshaft, alternator, igniton coil and driveshaft and on the motor block for each one of them, set them over there and then put the timing belt on, still i would take it to a mechanic for this, because if you do this wrong you might break off a valve inside one or more of the cylinders and that would be more expensive then to have it done right the first time.

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1 Answer

Where is the thermostat located in 1993 audi 90, can i have picture


It is located on the front of the motor under the timing cover, behind the timing belt. Usually this is replaced along with the timing belt job and the water pump. If you follow the radiator hose up from the radiator on the right side it's up where it goes into/behind the cover.

Mar 10, 2009 | 1988 Audi 90

1 Answer

Can't find thermostat location on 1988 Audi 90.


Hi Lol,
I'm not an Audi specialist however if you follow the top hose from the radiator to the engine block the thermostat housing on most engines is at the end, it may have 2 nuts or bolts securing it.
I hope you are now sorted if not please come back to me and I'll try to get my head under the bonnet/hood of a 90 to find what you seek.
Please remember to rate my efforts,
Paul 'W'
Onyer~EDson(:0) {#><U.K.

Jan 19, 2009 | 1988 Audi 90

1 Answer

1988 Audi 90


It would be alot cheaper to find a known good one rather than rebuild what you have. It is very expensive to rebuild one of these transmissions.

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