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Notes · 07-17-2020, 10:30 PM

72 C10 with 350. Put everything back together after installing AC. Drove about 50 miles with no problems. Drove 20 miles today, parked truck for a few hours, then started it up. Within 2 miles the factory temp gauge pegged. Put in 1/2 gallon of water/ant-freeze. Drove 20 miles home at 70 mph with no problems. Let it idle in the driveway for 10 minutes with the AC running & temps stayed fine. Radiator is still full. Where did the coolant go & why did it overheat so fast? Kinda gun-shy to drive it now. Time for an overflow reservoir?

07-17-2020, 10:30 PM	#1
Notes Registered User Join Date: Sep 2017 Location: Center Point, Iowa Posts: 82	Cooling system gremlin 72 C10 with 350. Put everything back together after installing AC. Drove about 50 miles with no problems. Drove 20 miles today, parked truck for a few hours, then started it up. Within 2 miles the factory temp gauge pegged. Put in 1/2 gallon of water/ant-freeze. Drove 20 miles home at 70 mph with no problems. Let it idle in the driveway for 10 minutes with the AC running & temps stayed fine. Radiator is still full. Where did the coolant go & why did it overheat so fast? Kinda gun-shy to drive it now. Time for an overflow reservoir?