"Glenn" <glenn_houston@yahoo.com> wrote in message
news:bOF4h.4437$L6.3359@newsread3.news.pas.earthli nk.net...
> Sorry for the double post but I just learned about cross posting in
> another group. Hey, I'm learning here!
>
> Thanks Dave and Tegger!
>
> Does anyone know the correct temperature thermostat for this car? Just
> bought it and it never got up to temp. Checked the thermostat and there
> isnt one. Somebody took it out. The info I am seeing on the web is
> confusing. There appears to be 3 different thermostats, 170deg, 180deg
> and
> 192deg. Which one is right? It is an F22A6 engine code.
>
> I also just learned, I think, that thermostats are sometimes rated
> differently. Some by opening temp and others by full open temp.
>
> Now I'm COMPLETELY confused.
>
> Glenn
>
>
>
In general, the hotter the better. Fuel efficiency and even engine cooling
benefit from a hotter thermostat.

The big limitation is usually whether the engine "pings" (detonates) under
load with the gas you use. For that reason the 192 might be a bit aggressive
and I'd go with the 180. 170s are mostly sold to people who are having
overheating problems and think (incorrectly) a cooler thermostat will help.

My experience with a thermostat that jammed suggests they probably open very
little in normal use. The car was a 1970 Volvo; I had to use the choke in
the winter even when it should have been warmed up. Turned out the
thermostat was jammed open about 1 mm and would not budge in boiling water.
(Say - did you know some wives get mad when you use their cooking pans to
test thermostats? Strange but true!)

Mike