Since we're in 100-105 degree weather in Texas now i was wanting to know if it would be a good idea to put a different thermostat in the truck. It runs right under the 210* mark so i'm guessing somewhere around 190*. It's just an idea, gonna ask around first to see which stat to get and everything. It's a stock 5.3. Also, are these hard to put in on these motors, all the one's i've done have been up top on the intake.

 

They are not hard at all. I put in a 160 from SLP it keeps me around 180 because I have done nothing to tell my fans to come on that low. GenIII's like warmer temps I would not go lower than 180-190 range. You can get all different brands from different manufactures I'm not sure which one is the best. I picked mine up for $20.00.Be sure to get a gallon of dexi-cool (orange stuff)antifreeze to replace lost fluid.

 

Do not use a 160* stat. You will lose 1 mpg on average, and there are no gains from doing this. At minimum, use a 180* stat. Either way, the O.E. stat and a properly maintained cooling system will not allow your engine to overheat.
The only other benefits are slightly lower tranny temps.
Don't use a 160* stat unless your are using forced induction.

Jim

 

If you read what I said above as long as you do not change your fans as to when thay come on it will hold you at 180!! And if 180 is your goal that will work!!!

 

I read you used a 160* stat from SLP that keeps your temps around 180-190*.
That's fine, I have the same exact 160* t-stat. It keeps temps right around where your saying (more like 175-185* at cruising speeds or when A/C is on. At idle and no A/C, it will still run at factory temps). Though, I still lost 1 mpg average by doing this. That was my point to my response. If that doesn't matter to him, then go a head and go for the 160* stat.
If I were to do it again, I'd use a 180* stat.
Just my .02 worth.

Jim

 

 

I Ran a 160* and lost more than 1 mpg, more like 2+. now it's collecting dust on the shelf. went back to stock stat and efans. alls cool, A/C works fine at Idle.