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5.3l 210 Degrees Theromstat

dcheeseman

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dcheeseman Enthusiast

dcheeseman

Posted
Posted

Hey Guys,

 

Have any of you considered changing the stock 210 degree thermostat. I would like to replace with like 185 degree. I just don't like the engine running that hot, I know GM engineers probably designed the trucks this way for MPG's. My 1995 5.7L K1500 silverado runs a 185 degree which is perfect. I most likely will change it after a tune, just wanted to see if anyone else has done this and to get your opinion.

 

Thanks in advance,

Daniel

minibike132 Senior Enthusiast

minibike132

Posted
Posted
Hey Guys,

 

Have any of you considered changing the stock 210 degree thermostat. I would like to replace with like 185 degree. I just don't like the engine running that hot, I know GM engineers probably designed the trucks this way for MPG's. My 1995 5.7L K1500 silverado runs a 185 degree which is perfect. I most likely will change it after a tune, just wanted to see if anyone else has done this and to get your opinion.

 

Thanks in advance,

Daniel

 

A 185 should cause it to set a coolant not reaching operating temperature code and a decrease in drivability/fuel mileage. I wouldn't do it, there isn't really any good reason to have it that cold.

dcheeseman Enthusiast

dcheeseman

Posted
  • Author
Posted
Hey Guys,

 

Have any of you considered changing the stock 210 degree thermostat. I would like to replace with like 185 degree. I just don't like the engine running that hot, I know GM engineers probably designed the trucks this way for MPG's. My 1995 5.7L K1500 silverado runs a 185 degree which is perfect. I most likely will change it after a tune, just wanted to see if anyone else has done this and to get your opinion.

 

Thanks in advance,

Daniel

 

A 185 should cause it to set a coolant not reaching operating temperature code and a decrease in drivability/fuel mileage. I wouldn't do it, there isn't really any good reason to have it that cold.

 

 

I thought that would be the case of like 160 or 170 degree theromstat. Do you have any idea whats the lowest temperature I can go with that wont affect the coolant temperature sensor, maybe a 190?

Zembonez Senior Enthusiast

Zembonez

Posted
Posted
195 was the OE 'stat for that engine...

+1

 

195 degree thermostat is what comes in these.

Jennabear Senior Enthusiast

Jennabear

Posted
Posted

These engines need to run at a higher temp in order to burn off condensation in the oil. I would not recommend swapping out the stock thermostat.

Eddie 70 Senior Enthusiast

Eddie 70

Posted
Posted

Go to any board where the guys are running LS based motors and ask that question. You will get answers both ways. Most guys that do have their cars (Camaro, Corvette, GTO) tuned are running cooler thermostats. When you have a tune done, let the tuner know so he can adjust for it. Having said that, I run the stock thermostat in mine and have no intentions of changing to anything else.

 

http://ls1tech.com/forums/

http://forums.corvetteforum.com/c5-tech-1/

http://forums.corvetteforum.com/c5-scan-and-tune-91/

Ryan00TJ Enthusiast

Ryan00TJ

Posted
Posted

I ran a 160* tstat in my 02 Camaro SS. I also had a H/C package and was tuned for it. Did really make no difference whatsoever. Don't mess with something that works.

clemsonblozz Enthusiast

clemsonblozz

Posted
Posted

your stock gauge is just something to look at.. It is not running @ 210,, They run right at the 195-198 range per my scangauge.. I have checked the temps in my 01 silvy and 04 tahoe, and even though the gauge shows right near the 210, they're not that hot..

 

The engine is designed to run that temp,, and running at a lower temp will cause accelerated engine wear, higher emissions, lower fuel econ, lower power, the list goes on..

 

One thing to check is your clutch fan.. I just replaced mine(due to crappy ac at idle), and it's made a hellava difference with the ac,, so you know the cooling had to be less efficent..

Zembonez Senior Enthusiast

Zembonez

Posted
Posted

Lower temp thermostats are an old school Hot Rodder trick that simply doesn't apply to many street driven vehicles anymore. These engines are designed to operate at these temps (whether we think they should or not) and as Jenna mentioned, the support systems are all made to operate correctly at these temps too.

 

Best to leave well enough alone.

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