Both six-cylinder and V8 engines employ cooling systems that are basically similar.
In the six-cylinder engine, coolant flows from the cylinder head, past the thermostat (if it is open), and into the radiator upper tank. In the V8 engine, coolant from each cylinder head flows through water passages in the intake manifold, then past the thermostat (if it is open), and into the radiator upper tank.
The standard thermostat operating temperature is 185°-192°F. However, a low reading thermostat of 157°-162°F is available for use with non-permanent antifreeze solutions.
A single water pump assembly is used. The pump has a sealed bearing integral with the water pump shaft. The bearing requires no lubrication. There is a bleed hole in the water pump housing. This is not a lubrication hole.