Pipes and hoses (Cooling system - Td5) (page 2 of 2)

The coolant pump is attached on the left hand side of the engine, behind the PAS pump. A cast housing, bolted to the cylinder block provides a common attachment point for both pumps. The housing has galleries which connect the coolant pump to the cylinder block and the oil cooler housing. The coolant pump comprises a shaft, a housing and a cover.

The shaft, which passes through the alloy housing, is supported at each end by bearings. Seals at each end of the shaft protect the bearings from the coolant. The forward end of the shaft has two lugs which engage with the PAS pump shaft. The opposite end of the shaft is fitted with an impeller which draws coolant from the feed pipe and circulates it through galleries in the cylinder block. The shaft is driven by the auxiliary drive belt at the same rotational speed as the crankshaft by a pulley attached to the PAS pump.

The pump is sealed in the cast housing with two 'O' rings. An outer cover is positioned over the pump and secured with six bolts and sealed to the pump with an 'O' ring. The cover provides the attachment for the feed pipe connecting hose.