$11.00 Thermostat = $400.00

[spankrz]

take THIS!!

[wzschirnt]

take THIS!!

 

That's the feeling!! lol Thick skinned. no problem!

 

z.

[TJay74]

Sorry but the issue was not the thermostat, it was the code that comes with running a cooler thermostat. Unless you are willing to turn the temp code related to the thermostat off you will always get this error.

 

The ECM has to see 167° with in 2 drive cycles or else the error light triggers.

 

I have tuned this error out on the last 5 GM vehicles I have owned, all of them have a 160° thermostat in them.

[redjewel2ss]

Efficiency = 1 - (Ta / Te)

 

Ta = Ambient Temperature (outside temps or air surrounding engine)

Te = Engine Temperature

 

pulled that straight from my old freshmen engineering textbook. the higher the engine temp, the more efficient the engine is. also, the colder the ambient temps, the more efficient the engine is. anyone notice how they get better mpg's when its cold outside? and that is why newer model engines run at as close to the boiling point of water as safely possible.

[gm4yrs]

Keep the stock stat and upgrade the radiator to a 6.0 L 2500, one core. Temp will be 170*- 180*, heater in winter will be lukewarm at 90*. I did this upgrade a year ago, no mpg drop or any codes. Last summer, temps will reach 200* with a/c, on freeway. Truck is a 1999 silverado, unsure if newer model is different.

[wavery]

Did you ever wonder why GM puts a 195 t/stat in the engine in the 1st place? .......

 

The parts in the engine all expand at different rates. everything fits right at 195. Trying to run the engine at a lower temp just frustrates the proper design of the engine. Not to mention all of the computer programing that triggers different electronic functions in the engine.

 

If you are experiencing an over-heating problem, a lower temp t/stat does absolutely nothing to resolve that issue. At 195 either thermostat is fully open and if the engine goes above 195, you have a different issue.

 

gm4yrs...... I don't care if you put 10 radiators in your vehicle. If you have a 195 thermo, the engine should maintain 195. If you are running 170-180 with a 195 t/stat, your t/stat is not working and you are subjecting your engine to unnecessary wear from not running at design temp and the computer thinks that your engine has not reached running temp yet so it sends mixed signals to every electronic device on your engine that controls air/fuel mixture, timing etc..

 

I have the puny little radiator that comes as the standard for the 4.8. I have never seen temps above 210 even with max payload, towing a 4K# trailer up a 6% grade on a 115* day.

[TJay74]

Actually a 195° is a function of emmissions more than anything. You have to have higher cylinder temps in order to properly burn off all of the fuels and to meet EPA requirements.

[wavery]

Actually a 195° is a function of emmissions more than anything. You have to have higher cylinder temps in order to properly burn off all of the fuels and to meet EPA requirements.

 

That's correct but the fact is, that's the temp that all of the engine parts are designed around (for expansion and contraction) and electronic control devices for optimum performance........... higher temps will result in too much expansion until (at some point) the parts will seize. Lower temps will result in too little expansion and parts are too lose resulting in increased wear.

 

There is absolutely no upside to running a lower temp t/stat.

 

There are dozens of things that could cause an engine to over-heat....... a lower temp t/stat will cure none of those issues.

[gm4yrs]

In 2005, didn't 1500's have 34 in. radiators with electric fans? Only difference I have is an all aluminum radiator.

[TJay74]

Actually a 195° is a function of emmissions more than anything. You have to have higher cylinder temps in order to properly burn off all of the fuels and to meet EPA requirements.

 

That's correct but the fact is, that's the temp that all of the engine parts are designed around (for expansion and contraction) and electronic control devices for optimum performance........... higher temps will result in too much expansion until (at some point) the parts will seize. Lower temps will result in too little expansion and parts are too lose resulting in increased wear.

 

There is absolutely no upside to running a lower temp t/stat.

 

There are dozens of things that could cause an engine to over-heat....... a lower temp t/stat will cure none of those issues.

 

 

I am almost certain most people dont run a lower t-stat to avoid overheating, they run them so the vehicle runs cooler which results in a denser air charge which helps with not only making more power but also with detonation and being able to run a more aggressive timing map.

[wavery]

I am almost certain most people dont run a lower t-stat to avoid overheating, they run them so the vehicle runs cooler which results in a denser air charge which helps with not only making more power but also with detonation and being able to run a more aggressive timing map.

Don't be TOO certain. Read the last paragraph in the 1st post.

 

This is a very common scenario. People often think that a lower temp t/stat will help avoid over-heating (it doesn't). In fact, it's common for some people to remove the t/stat all together.. This will sometimes make the engine run hotter because the water travels through the radiator to quickly to cool.