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Originally Posted by Overboost
Thanks Fifty! All back together and fan spins so much faster. AC blows colder and coolant temps are staying not higher than 103C. Still a little high for me so ordered a new thermostat and water pump.
Everything started to change on our trip to the Black Hills, SD when the fan clutch locked up. Temperatures are running 5C to 7C high in a traffic or idle condition.
Still chasing the obvious by replacing the locked up fan clutch and slow spinning aux fan but still haven't found nirvana. Maybe next week.
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Yeah, sounds like you need a new stat. I think the ideal temp is 95C. That'll give you 203F. 103C is 217F. That's definitely too high. Hope your new stat gets your temps down. Interesting though, it seems failure mode on these is usually stuck open rather than partially closed.
New pump "while you're in there"?