[s-cars] Thermostat

[Sean Douglas]

I think it may be 10 mm bolts.

Sean Douglas
1997 Audi S6//RS2-spec
1990 Audi 90 quattro 20v


> -----Original Message-----
> From: s-car-list-bounces at audifans.com 
> [mailto:s-car-list-bounces at audifans.com] On Behalf Of Sean Douglas
> Sent: Saturday, December 04, 2004 2:26 PM
> To: tlarson at tds.net; s-car-list at audifans.com
> Subject: RE: [s-cars] Thermostat
> 
> 
> Tim:
> 
> It's a fairly easy DIY job, just did mine about a month ago, 
> but the access is fairly tight. You do not need to remove the 
> intake manifold.
> 
> Parts and tools;
> 
> T-stat (OEM or Wahler)
> Rubber o-ring
> G11 coolant Pentosin Blue, 1 gal
> Drain pan
> Rubber hose, 3 ft, 1/2" ID
> 
> 1. You will need to drain the coolant first. Put the car on 
> ramps or jackstands and remove the plastic belly pan. The 
> drain cock is on the right side of the radiator at the 
> bottom. Use a stubby flat blade screwdrive to loosen drain 
> cock. Attach rubber hose or to drain nipple and direct the 
> coolant flow into a catch bucket, open drain cock fully. 
> Loosen or remove the coolant resevoir cap to let air in so it 
> will drain properly.
> 
> 2. The t-stat is located on the left side of the engine near 
> the front and is under a black plastic housing.  Two small 
> bolts (8 mm) hold it in place. It will help to have a small 
> 1/4 drive socket with a universal joint also one of the bolts 
> can be reached with a long extension and u-joint, the other 
> requires reaching in with the aforementioned 1/4 drive socket.
> 
> 3. Remove t-stat, the only problem you may run into is that 
> the t-stat frequently gets stuck and "welds" itself to the 
> aluminum. I used a small screwdriver and inserted it through 
> the brass strap to get some leverage and pulled it out.
> 
> 4. Install new t-stat. Make sure you note the proper 
> orientation and use a new rubber o-ring.
> 
> 5. Put plastic housing back on and tighten the 2 bolts in 
> sequence. Be careful not to tightnen too much or you may 
> crack the plastic.
> 
> 6. Tighten up drain cock, put belly pan back on
> 
> 7. Fill resevoir with a mixture of coolant and distilled 
> water (depending on the desired temp), start car and fill up 
> as it sucks it into the radiator.
> 
> 8. Allow to come to full operating temp and check coolant level.
> 
> Hope this helps.
> 
> Sean Douglas
> 1997 Audi S6//RS2-spec
> 1990 Audi 90 quattro 20v
> 
> 
> > -----Original Message-----
> > From: s-car-list-bounces at audifans.com
> > [mailto:s-car-list-bounces at audifans.com] On Behalf Of 
> tlarson at tds.net
> > Sent: Saturday, December 04, 2004 11:32 AM
> > To: s-car-list at audifans.com
> > Subject: [s-cars] Thermostat
> > 
> > 
> > My thermostat is stuck open, and I was looking to get it
> > changed ASAP as its starting to get cold finally.  I have the 
> > thermostat, but was wondering how difficult it is to install. 
> >  I don't yet have a repair manual.  Is it something I can do 
> > without one??  I can't see the location of it, so I'm 
> > assuming I have to take off the intake manifold and 
> > miscellaneous other parts to get to it... Thanks for all the help.
> > 
> > Tim Larson
> > '92 S4 in MN
> > 
> > 
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