[DeTomaso] head drilling for air release

[MikeLDrew at aol.com]

In a message dated 9/3/09 16 55 9, tonydigi at optonline.net writes:


> >For reasons known only to thermostat manufacturers, thermostats always 
> fail
> CLOSED.
> 
> Although I agree with the sentiment, how often would you notice if one
> failed to close?
> 

It's rather apparant actually--some cars have such efficient cooling 
systems that they will never get up to operating temperature if it's not properly 
regulated by the thermostat.   My Cobra was such an animal--it has an 
outstanding radiator, and the car would consistently run at about 145-150 degrees. 
  I opened the housing up and found the 180 degree thermostat was partially 
stuck open.   I replaced it with only little effect.   I eventually 
switched to a 192-degree unit (which is what Ford recommends for the 427) and that 
finally got my engine operating temperatures into the 175 degree range. 
(verified with a heat gun, and my water temp gauge is mechanical).   I think the 
thermostat is constantly cycling open and closed.

Mike