That is just for pressure. If you drill a hole in the new T-stat wit will do exactly the same thing.

 

should i???

where??

how big??? 1/8 1/4 ???

 

I am so confused about what you are asking. Maybe break up your questions and rephrase.

The stock replacement for our truck works just fine, will come with the notch, will come with the pressure relief hole with the ball in it, and just cost you an arm and a leg.

If you want to save money buy the 5.2/5.9 engine t-stat 54mm or 2.125", and grind the notch yourself. If you want the pressure relief hole, just drill one.

 

That hole with a check valve is known as a "jiggle valve", it there to prevent air from getting trapped in the system. Making a 1/8th" hole and installing the new thermostat with the hole "up" will be fine.

 

tomorrow morning :P

how much prestone will i loose in i just install the sensor

had if i remplace the thermostat do i need to drain the rad completely???

 

Might as well, it's going to start draining once you unbolt the thermostat housing. Since the hose is at the bottom of the radiator, your best bet is to just drain the radiator before you start.

 

i just finished to trim the dodge shroud and fit it to the HHR like ueland really cleen installation.

now the pt189/1210117 is not in stock and is special order 50$ so i am looking at a remplacement waterproof connector and cut the stock HHR plug off

 

Borg Warner PT299, Niehoff PS38051, or Standard Motor Products S568 are interchangeable.

 

You don't have to use those, I just wanted it to look factory. Good luck man.

 

Summers coming. Time to bump this thread. Just working on my efan install right now. Replacing the t-stat right now.