First check your fluids. Radiator low? oil overfull? The 466's are known for liner pin holing, if the coolant hasn't been maintained. Second check your fan clutch,if it is a viscous drive, and it spins real easy with the engine off,it isn't moving any air. If it is a horton air operated clutch(don't know how the truck is spec'd)make sure it is engaging. If it is a Horton there should be a switch on the dash to override the temp sensor and make the fan lock up regardless of engine temp. The clutches wear out on the Hortons and don't engage, but there is a provision to lock it up manually with a bolt to get you home as a temp fix. Another thing could be the torque converter is weak and heating up the trans fluid,which in turn heats up the coolant.
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Today's Featured Article - Engine Valves - Some Helpful Information - by Staff. Intake - On the intake stroke the piston moves doward, sucking in carburized fuel through the open intake valve. Exhaust valve is closed. Compression - With both the intake and exhaust valves closed, the pistons upward stroke compresses or squeezes the fuel into the combustion chamber. Firing - Ignited by the spark, the compressed fuel explodes and forces the piston downward on its power stroke. Intake and exhaust valves are closed. Exhaust valves and seats are exp
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