[Vwdiesel] Thermostat temps

[LBaird119 at aol.com]

  I ran a 92C for several years in the Rabbit and finally 
changed back to the 87C  (197.6F vs 188.6F).  I found 
no noticeable difference in driveability, mileage or heater 
output.  I DID have more margin in my cooling system though. 
I managed to blow a head gasket while I was running water 
through it for a  day or two to flush it.  
  Best I could figure was I got enough "localized" boiling as to 
create vapor bubbles that got to the stat and insulated it 
against the water.  It simply wouldn't open without a good 
antifreeze mix.  
     Loren

In a message dated 1/30/2007 3:56:38 PM Pacific Standard Time, 
r.c.brown at ieee.org writes:

> Has anyone tried out a hotter thermostat in their VW diesel (A1, 1.9D 
> engine) for a little higher 
> operating efficiency?  Not sure what I have in my engine now, but looking at 
> either an 87C or 92C 
> valve to put in.  I currently run at the lower heavy mark on the temp gauge, 
> the third one from the 
> left:
>