one more question about the notch/dremel tool. Do I need the cutting wheel for this, or what? I am also assuming from what I saw in the online manual that I need to drain the coolant...

 

you have to drain the coolant because the stat is in the bottom of the block. Its gana get everywhere so be carefull

 

Anyone running the Jets stat?

I need to change mine on my truck because now that summer it here mine is running on the middle line all the time and sometime over a little.

Does anyone know if the 3.7and 4.7 use the same stat?

 

i have the jet 180 degree stat. it works good

 

Does the jet stat have a fail safe? So it will just remain open if the thermostat ever fails instead of sticking closed?

 

yea it does

 

Does the cheap Napa one have the same thing?

I dont mind having to cut the notch, I just dont want a P.O.S. for a thermostat.

 

im not sure but i wouldnt get the jet only cuz its 30 bucks

 

There is nothing wrong with the, "NAPA" therm'. I installed one and it's working just fine. My truck is still running warmer then I feel it should. However, I can see the needle dip down when the thermostat opens. I think I have other problems other then the thermostat. Cutting the little notch is simple and should take all of 2-3 minutes with a dremel tool.

 

just for referance... i put the 180 napa stat in the 08, it didnt have a notch so basically a drop in, must be yet another change for the 08+ engines