New thermostat fixed me right up. Running at a normal 195-200 degrees.

Hope it helps you too! Let us know

 

What did you use.... a 195 degree thermostat

 

Yes, it is a 195 degree t-stat from Napa. Good luck!

I was trying to finish before dark but had to reconnect everything and go to the hardware store for a deeper 13mm socket in order to remove the t-stat cover. Ended up having to buy a work light too lol...

 

Looks like I'll be replacing my thermostat some time next week. I believe it went out last weekend, because since then my temp reads at the 1/4 position no matter how I drive.

 

I just saw this thread and want to confirm Mark_D's findings. I went through the same thing about 4 years ago on mine. Third stat finally fixed it.

 

rob44 -
The only downfall I can think of for waiting a week to do the t-stat is that your gas mileage is going to come down. My truck is usually around 17.9-18 mpg on average but with the broken thermostat it was getting closer to 15. Good luck!

 

Well, I have to wait, because all of my tools are sitting at home. I'm in college, about 90 miles from home. But next week is spring break, so I'll have all the time I need to swap them out. Any chance you could briefly describe what you had to do to change it? I've never changed one of these before, but I'm sure it's fairly simple. My fuel mileage hasn't noticeably changed, I still get 13-15 mpg with my lift and tires.

 

Well, that was easy. The thermostat is located to the left the egr valve if anyone wants to know. The Napa Premium 195 degree thermostat worked perfect for my rig.

 

By the way,the reason one should never over-compensate on coolant is because all coolants gel instead of freeze-but one still needs the thining effect the water gives at even at -70*(the coldest I ever started any gas engine,the battery was kept inside for the night) step66