Re: Thermostat Question

[farna@xxxxxxx]

A 160 thermostat may keep the engine to cool and thermal efficiency will suffer some (mileage and power, though if a noticeable amount of power is debateable). The engines were designed to run at 195-210 degrees, but a 180 thermostat might be called for on a built engine because of the greater amount of fuel and corresponding higher combustion temperatures. If you're running a stock or mild engine leave the 195 in there. It will warm up faster and run better in the long run. If it's a little more than mild, you might be better off to drop to a 180. I don't think much below that is any good for a gasoline engine except under unusual circumstances. If the engine running hot (230 degrees of more) is a problem, look to the rest of the cooling system. It's not uncommon for an engine to run as high as 220-225 degrees in warm weather pulling a load. As long as the temp is steady and doesn't get hotter, it's fine. 


On October 19, 2004 Mark Ogulnick wrote:

> I recently replaced the 195 degree thermostat in my
> 360 with a 160 degree.  Some people I've talked to say
> this is okay.  However, a friend of mine who owns a
> number of AMC's and is an excellent mechanic says it's
> very bad.  Is a 160 too low and if so, would a 180 or
> 185 be better?  Any suggestions or advice would be
> appreciated.
> 
> Mark
> 
> 
> 
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