Cat Man HHR

Hi
From what I have been reading the stock thermostat is a 180*F
Has anyone installed a 195*?
Why should the HHR run a colder thermostat compared to all late model cars that use 195*?
Thanks

Snoopy

Because it was designed for it by the manufacturer!!!

donbrew

Because it is designed to run most efficiently at about 190F. A 195F T-stat would let it run averaging 200F or more.

The computer is programmed for a 180F and you will most likely get a CEL. Change it at your own peril.

Oldblue

Just spend the money on the correct GM T-stat it was designed and calibrated for, you will save money in the long run!

Lucky

X4 to all of the above.

LawDog88

Motion passed.. After mine got stuck, it was an OE t-stat that replaced the bad one. PO didn't care that his internal temp gauge didn't read, but I did...

donbrew

I just thought of another eason not to try it: The fan is set to srt up at 219F and turn off a 179F. It would never get down to the cut off temp.

Cat Man HHR

Thanks for your answer to my question

rhomanski

My old mini van was designed for a 180 therm. The parts guy told me it was a 195. I couldn't remember at the time so I took it. After putting it in, I started it up and let it idle. All seemed okay. Next time I started it, I went to work and it overheated. The radiator wouldn't let it get to open before the block got way too hot. Warped the head. Expensive mistake. That's why I still remember it's a 180, 25 years later.

Oldblue

Excellent point as to why I recommend the GM original 180 degree T-stat the engine is designed for.