Have any of You folks changed out the stock T-Stat for and aftermarket 203* T-Stat? If So what are You finding? Any increase in MPG or performance or just Your opinions would be good.

 

I have wanted to do this with my 6.0 in sig. In winter mine runs 185 with winter front in the city and about 195 on the highway with winter front. I would like to see her run a bit hotter, better mileage, better complete combustion. Trick is, I think the low fan comes on around these temps, so I dont know how well it will work.

 

Personally I don't think this is a good idea since everything is now dependant on a computer that is programmed for the factory components.

 

At what temp does the fan clutch start to engage?

 

There is no "set" temperature. It is based on a combination of numerous parameters.

 

I also want to do this. only for the winter tho

but one thing to take notice is that the temp of the water effects the EGR cooler and oil cooler.

 

Who sells them?

 

I wouldn't do it. Raise your water temps a few degrees and it raises your oil temps a few more due to the cooling efficiency. You end up just putting hotter oil through your turbo and injectors.

 

I've never seen a 203* thermostat for a 6.0L. I only knew of them being made for the 7.3L.

 

My factory t-stat read 190* to 210* on it if I remember. I am guessing a 203* won't opne at all til 203*? Seems too hot to me. My ECT already hits 210* just driving around town in traffic in the New Mexico summer.

 

Dieselsite sells them, keep the feedback going as it seems We still have some unanswered Q's! Thank You all.!

 

they sell it for the 7.3

 

I saw that for the 7.3. I wondered about the 6.0? I'm unclear as to whether or not it would be a benefit?

 

I did it to my 7.3 and it was one of those things that I couldn't really tell if it helped. Sounds good though to me in theory especially in the winter if you drive short trips.

 

In a hot climate, going up on t-stat temp would be disastrous.

In a cold climate, going to a hotter t-stat would probably not harm the motor, but would give you a little more "headroom", much like putting in a 180-degree stat in July in TX.

You'd have a little more heat in the heater, the engine wouldn't run QUITE as cold (an issue when the engine will air-cool under little to no load), wouldn't cool off after shutdown quite so fast... The benefits are incremental. No jaw-dropping, eye-popping changes will be substantiated.

Just don't do it in a region where temps get over freezing (32*F/0*C). Base engine temps 10 degrees hotter, anywhere below Interstate 80 (i.e. 2/3 of the continental US), will cause more problems than it will solve.

-blaine