Engine Thermostat

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"2006 Chevy Uplander. I like this thermostat a lot!" - by Matt K. (Los Angeles, USA)
This thermostat has been working great for over a year. It has held up under multiple other coolant issues and many removal and installs.
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"Fit my 2009.1 G8 GT" - by Donnell Rucker, Jr.
This ACDelco is the oem replacement for my G8. It’s a beefy thermostat just like the original it would’ve replaced. Unfortunately, I had to go with another brand thermostat (wimpy looking) from a local parts store because the ACDelco wasn’t delivered on the day promised. Eventually I’ll get around to swapping out the wimpy thermostat for the ACDelco. Crazy.......I know!
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"The Best - Works Great with BBC" - by RalphL (Maryland, USA)
I have a high performance 454 engine with a regular fan and brass radiator. I've been using the Stant 180 degree SuperStat with all of my Chevy engines. For the 454, we ran the engine at 3,000 RPMs for over 20 minutes for the initial engine break-in, and it did not get close to over-heating. I did drill two small 1/16" holes in the thermostat housing to allow the release of any air that might have been trapped in the system. Not sure if it's an old wive's tale to do this, but apparently it didn't hurt! Even with my rudimentary cooling system, my car has never over-heated.
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"Great price and fit perfectly" - by Cleary University
Great price and fit perfectly. I have a 2011 Chevy Cruze Eco. No issues, came with the o-ring and temperature sensor built in.
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"Should refer you to the gaskets you need..." - by Z
Hey - this thing works on my 92 chevy suburban 350. But - it does not come with the gasket for the top (fiber) nor the gasket (rubber) which fits around the edge of the top section to form a good seal once it sits in the intake manifold... I had purchased the Fel-Pro 35062 Water Outlet Gasket - but had not purchased the rubber one. I was able to use the rubber gasket from my old thermostat...
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"Good T-stat except for the gasket" - by JJ
I wanted an OE stat since mine had been sticking open. The price here is not the greatest and can be found cheaper (including shipping) but I used amazon since I can have it shipped 2nd day for free with prime.

Overall it is a good T-stat and high quality. Even though the part is not labled it is a 195F T-stat.

My only complain is the rubber seal/gasket is too small for the opening allowing it to move around some when you install it. I did orginally install it with the seal that came with it and it sealed up fine but I wasn't completely satisfied. The next day I went and purchased a felpro 35710 seal at the local auto part store for a buck and change which fit perfect.

If your looking for some cheaper Delco options or different temps maybe this might help you out:

Part Number: 12T31D
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Engine ... full review
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"Buy this" - by RayGUN (FL)
Had put in another well known brand and temperature gauge would spike up after car idled for a few minutes in drive. The temperature gauge also read a little higher. Put in this thermostat and no more spikes and gauge reads where it did when the car was new. !999 Grand prix with 168200 miles.
I don't like GM because they are overpriced and I can buy quality aftermarket parts cheaper but in this case the OEM part worked better than the aftermarket.
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"Fit my 2003 Ford Expedition 4.6L Triton V8" - by Stephen (NEWBERG, OR, United States)
I had an engine code for the car not reaching operating temperature during normal drives. This did the trick - works great now in my 2003 Ford Expedition 4.6L Triton V8.
Don’t forget to buy the O-ring/gasket when replacing this!
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"Very quick and easy do it yourself repair." - by Robert Grant Jr (Little Egg Harbor, NJ United States)
Showed up on time and was super easy to install on my own with a pair of channel locks for the hose clamp and a 10mm socket wrench for the two mounting bolts. Got rid of my error code and got me a passing inspection sticker.
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"Cool your engines" - by Hugh
My 2004 F1 50 four-wheel-drive 5.4 Triton needed a new thermostat this fit the bill good.
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"Perfect!!" - by A.S.E. - M.A.T.
Perfect !!! What the factory should have installed in the first place.This part will extend the life of your engine by reducing heat stress. Note... This works best if you have your PCM reprogrammed to lower the "window" of cooling fan operation 10 degrees F. For all 3.1 and 3.4 GM engines up to 2006.