H3/H3T 3.7l OEM 180 Degree Thermostat

[Bigunit]

I was researching the part # for the OEM 3.7l 180 degree t-stat and came up with the following info.:

GM part #12622316 supersedes GM part #12620113 which supersedes GM part #12579956.

The #316 stat is 194* and #113 is 180*. #956 was the original 180* t-stat and the #316 194* t-stat is the GM default t-stat after the #113 and #956 t-stats were discontinued but the #113 180* t-stat can still be found at dealerships that have new old stock, you just gotta find them. I know, this is confusing
..like, who's on first and what's on second. [emoji12]

I found some #113 180* t-stats on eBay but most of the Ebay listings for the #113 t-stats are actually for the #316 194* t-stat. Buyer beware. Read the fine print in the listing. The #113 180* t-stat is still out there but hard to find.

Hope this helps anyone looking for an OEM 180* t-stat.

 

[MSC]

The Stant brand 180 degree is made by Baer and is a 192 degree, check the markings and see if they have 88 on them. 88 refers to 88 degrees C which is 192 degrees, I found this when I ordered a 180 degree from Summit Racing, that's when I built my own and installed it on the outbound side of the engine. I have a complete write up on another forum with my findings.

 

[Bigunit]

I didn't include the Stant t-stat as I was looking to see if I could still find an OEM 180* t-stat vs. an aftermarket replacement but good info none the less. I ended up finding and buying the OEM 180* t-stat on EBay.

 

[Texatl]

Awesome!!! Perfect timing. I need to replace mine. Getting a P0128 CEL and a stuck open T-stat I'm told is the likely culprit.

Big rig thank for the info.