RIVET-FLAT HEAD 3F1805 - Caterpillar

The coolant flows from the bottom of the radiator to the centrifugal water pump. The water pump is installed on the front of the timing case. The water pump is driven by a gear. The gear of the fuel injection pump drives the gear of the water pump. The water pump forces the coolant through a passage in the timing case to the front of the cylinder block. 3054 EnginesThe coolant flows to a passage in the left side of the cylinder block. The coolant then flows to the rear of the cylinder block. If an oil cooler is installed, some of the coolant flows through the element of the oil cooler. The coolant then flows to the rear of the cylinder block.Some 3054 engines are equipped with a plate type oil cooler. The oil cooler is installed between the oil filter housing and the oil filter head. If the oil cooler is installed on the left side of the engine, coolant from the bypass line at the rear of the water pump flows through a pipe to the oil cooler. If the oil cooler is installed on the right side of the engine, a line is connected between the housing of the water temperature regulator and the oil cooler. The coolant from the water pump flows around the tubes of the oil cooler and flows through a pipe to the cylinder block. The coolant then flows around the cylinder block and flows into the cylinder head.The coolant exits the cylinder head at the front. The coolant then flows into the housing of the water temperature regulator. If the water temperature regulator is closed, the coolant goes directly through a bypass to the inlet side of the water pump. If the water temperature regulator is open, the bypass is closed and the coolant flows to the top of the radiator.3056 EnginesThe coolant divides as the coolant enters the cylinder block. Most of the coolant flows along the right side of the cylinder block. The coolant then flows around the outside of the cylinders to the rear of the cylinder block.The remainder of the coolant flows along a passage in the left side of the cylinder block to the lubricating oil cooler. The coolant flows around the element of the lubricating oil cooler to the rear of the cylinder block. The coolant then flows to the rear of the cylinder head.The coolant flows forward through the cylinder head. The coolant then flows into the housing of the water temperature regulator. If the water temperature regulator is closed, the coolant goes directly through a bypass to the inlet side of the water pump. If the water temperature regulator is open, the bypass is closed and the coolant flows to the top of the radiator. Some engines have two water temperature regulators which function in the same manner as a single regulator.