What thermostat to run??

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95TwinTT

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There seem to be a lot of guys running lower temp stats here. I’m not sure what the reason would be in the winter, but I would like to point out that oil does not lubricate as well at lower temperatures.

I once bought a new chev pickup truck that came from the factory with a piece of casting speered through the thermostat, holding it open.

I complained over and over again to the dealer about the lack of heat. Because it was a diesel engine, they kept telling me that diesels, run colder than gas engines.

I would have gotten into it myself, except the truck was under warrantee and I figured it was their job. Plus I was busy working 70 hours a week at my job.

Finally after getting back from a trip to Chicago during frigid temps, I stopped back at the dealer to insist they check the thermostat. This was visit number six for lack of heat.

I came back the next day to pickup the truck and found it in the bay with the engine removed. Running cold had caused all the cylinders to wear in a “bell” shape. (much wider at the bottom)

Chevrolet gave me a new engine when they could have just checked the stat in the first place.

You guys do what you want, but just know that a cold engine is not being lubricated as well as it should be…………………..:)
 

TIM Z

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Great point and advice.

If you have to drive your vehicle year round, do you self a favor and either leave the stat stock or have 2 thermostats to use for warm and cold weather.
 

JennaBear

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X2

These engines need to run at higher temps to burn off condensation in the oil as well.
 

Brandon X

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If I lived down south id run a lower temp, but it was 6 degrees fahrenheit today, soooooo...
 

mdiacont322

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What does a colder thermostat do anyway? does it increase power?
 

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