System Circulation

The engine mounted water pump is belt driven. Coolant from the radiator outlet flows to the water pump inlet and is pumped through coolant passages in the crankcase and into the cavities surrounding the cylinders. Coolant then flows through holes in the cylinder head gaskets into the cylinder head coolant passages. Passages in the intake manifold direct the coolant to the thermostat. When the thermostat is closed (cold engine), the coolant is prevented from returning to the radiator and is recirculated for quick engine warm up.

Once the engine has warmed sufficiently, the thermostat opens and coolant flows to the inlet tank on the top left side of the radiator. It is cooled as it flows across the horizontal core tubes to the outlet tank on the right side of the radiator, completing the cycle.

The cooling system is sealed by a pressure type radiator filler cap which causes the system to operate at pressures higher than atmospheric pressure. This higher pressure raises the boiling point of the coolant and increases the cooling efficiency of the radiator.