ACDelco gm original equipment 131-163 engine coolant thermostat

Thermostat corolla 1998 not same. That why, I returned.Thanks

OEM replacement for my 2004.5 LLY Duramax Diesel engine. Operated flawlessly at the appropriate temperature.Don't forget there are two different thermostats needed! (Other ACDelco thermostat needed Part #131-131)

Works great

This is the front thermostat in the trucks thermostat housing 185 deg. Like other reviews have said it's a little tricky to replace but with about 1 1/2 hours and a little care it can be done by the average mechanical person. As in other reviews I considered removing the air conditioner compressor for better access but in the end only removed one bolt. It took a little time to get the air out of the system, unlike other reviews I didn't fine a bleeder screw on top of the housing. Because my truck is mostly run in warmer temperatures I was unaware I had a problem until I got a code for lower than expected engine temps. Now that I look at the engine temp I do see to come to temp quicker and run's right at the normal temp.

Installed with - 131 to complete two thermostat installation

If you’re looking to save money, this product works perfectly. Guess we’ll see how long it lasts but it (they) sure look like top notch thermostats to me. Identical to the ones I replaced which were factory installed.