Originally Posted By: Rohan
Hello everyone,
I know most of you are not happy to see my thread again lol. I didn't want to post anything until I found the clue. So I find the problem hopefully and I see some grease all of the thermostat housing between thermostat gasket and engine block where thermostat go into engine . Time to buy the new thermostat right?
All I can say is, if you're going to replace the thermostat, I recommend you use an OEM one. Last month my mechanic replaced the thermostat in my grandmother's Trailblazer with a Stant brand aftermarket, it started overheating. Then we put in an OEM one and it is perfect. The aftermarket actually had a 10% smaller opening than the OEM (I measured).