ok i have a 97 A4 2.8 Q 12v. i cant figure out how to change the thermostat. i have taken a couple pics of where i thought the stat was located but apparently its not there. i ordered a stat from a local automotive store and there is no way in hell it could go there. i was told that there are 2 bolts on the water pipe that i have to take out to get to the stat but i cant find any bolts anywhere. i have felt with my hand all the way til it hits the block and i cant find any bolts. and the stat is entirely too big around to fit in the water pipe where i have it shown in the pics. so does anyone have any idea where the stat is located if i am looking in the wrong spot? and if i'm in the right spot, then how does the new stat go in? do i have the wrong stat? please help me!!!! any info will help....thanks

 

time to replace your timuing belt, the thermostat is located directly in back of timing belt uner housing, you need to pull bumper and timing covers to just get at it, iy is physically impossible to remove the stat without removing t-belt so my advice is go to blauparts.com order the 12v timing belt kit and tool rental and have a go at it.

 

"Though it's possible to remove the thermostat without removing the timing belt,
... Where is the Thermostat for 1993 Audi 100 S/// V6, 13-Jan-2005 ..."
http://www.12v.org/maintenance/repairs/tbelt.php