Here is a time when I would ignore Rootes and go with virtually all the US
recommendations for a SB Ford: 180 F thermostat. I used to have a 160 and you
are correct, most of the time it was 190 or higher. However on a crisp autumn
morning (SOCAL folks look this up in the dictionary) with cold dense air and a
clear sky it is a little chilly and the car ran at 160, which is not a good
thing for the engine according to Ford experts. Since a 160 or 180 makes no
difference at the high end, the thermostat should be selected to protect the
low end which is considered very important.
Steve Laifman <SLaifman@socal.rr.com> wrote:
All you say is correct with the stock system, and Rootes recommends 160
F thermostat except in English Winters (9 months). Since the only time
it freezes here is in the ice cube tray, I just stick with the 160, and
it runs very nicely at 190 F.
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