Thermostat issue?

[gitchasome]

Hey Guys,
My EOT and ECT are reading about 178 when hot, I do have a EGR delete and oil cooler put in about 6k ago and am running tunes, that ok or do you think my thermostat is shot? and if so how do you go about replacing them?

[amdriven2liv]

Really need to replace it. They start opening at 192*

[gitchasome]

how do you replace them?

[amdriven2liv]

Here is a write up. It is a complete write up for flushing, but, you can just do the first part on removing T-stat, then do reverse to install.


6.0 coolant change

[amdriven2liv]

Or this one might be easier to understand.


Thermostat Removal Option: (Thank you 69cj)
A) Pull air cleaner assembly.
B) Drain coolant (See step 3 above).
C) Remove upper radiator hose.
D) Remove 2 nuts on t-stat housing.
E) Lift and move press sensor bracket to the side. Not a lot of play in it but it will move.
F) Remove 2 more nuts on t-stat housing.
G) Remove housing. It will lift right off of the studs.
H) Reverse procedure to re-install. Use a new O ring (5 bucks at dealer). I used Vaseline to hold the O ring in place. Tighten nuts to 23Nm (17lb/ft)."

[amdriven2liv]

Here is a picture of the motor. What year is your truck?

[gitchasome]

ok cool, is there a way to get at it without removing the air box and do you need to drain the coolant?

[amdriven2liv]

Easier to remove the air box, it just takes a few minutes.

Air Filter Change_x264.mp4 - YouTube

Air Filter Change_x264.mp4 - YouTube

Yes, drain some coolant into a clean container and re use it.

[Heathrm]

I'll be doing the same thing very soon. My coolant temp wants to stay at 182-186 even when hot. Time for a T-Stat replacement.

[worldwide73]

I wish someone made a good thermostat for these trucks, they are simple to replace, but they don't last long.

I always loosen the top hose clamp on radiator. Then remove the two bolts holding the thermostat to block. The thermostat will pull out with the hose. You can replace the thermostat on the end of the hose and snake it back in. No need to remove any piping or air filters.