Overheating problem please help!
Okay guys I'm new here and really need some help on figuring out why my trucks temp gauge fluctuates. I can drive for about 10 min and the truck will be around 230 degrees. Than all of a sudden the temp will drop down to about 205. I have a 195 thermostat in it i just replaced. also just replace the radiator so i know its not that. Water pump looks fine from what i can tell don't see any leaks. I'm gonna try a flush tomorrow to see if maybe there's an air bubble. Any help is much appreciated. Thanks Mike.
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