Has anyone done a thermostat change on the 3100? I really need to change mine and i'm wondering if anyone has any info/pics/tips. Would be greatly apreciated

 

remove the air intake duct to the t/body,
unhook the coolant lines from the t/body,
remove the throttle body,
now there is two 13mm bolts.
the rear one actually has a slot in the therm housing, so you can leave it still in there by a few threads and pull the housing off, and get the t/stat out and put the new one in, put the housing back on and then just tighten that rear bolt. put the other bolt in and put it all back together.

 

ah geez i heard it was complicated But thanks for the steps

 

I believe you can also try to remove the crossover for access, but the throttle body is easier

I'm so glad all of this isn't necessary on the 3.8

 

Well hopefully once i get it changed i'll have some heat and a few more mpg's

 

only one like it i have done is one of these... slightly different than a monte but the same...

make sure to bleed the system when your done too

 

Good point, does the 3.1 have a bleep screw anywhere? and any specific coolant or just any old 50/50 mixture?

 

Yea I did one on a 3400 before too. It's a little challenging but you can handle it.

 

there are two bleeder screws one is on the thermostat housing. the other is right on top of that black pipe by the water pump

 

thanks for the tips everyone, when i get to a day where i dont need the car i'll hopefully take a stab at it