[s-cars] Quick coolant question....

[riff944 at cox.net]

Hi All-

Using this invaluable list and the on board codes from the HVAC controller (thanks Vincent!), I have found out that my t-stat has crapped out.  Car did not get over 6.5C during a 15 min drive to work!  No wonder I have been getting crappy gas mileage while babying the throttle.

How much coolant should I drain before changing the t-stat???  I'd rather not do an entire flush and fill if it is not needed?  I think I will try to tackle this one tonight in my freezing garage....

Thanks,
Riff

95 //S6 running cold.....