Cooling pump (VW Golf 1)

Excessive noise during operation or coolant leakage around the pulley and shaft are signs of wear or failure of the pump. The cooling pump cannot be repaired and should be replaced with a new unit if defective.

Engine 1.1 /1.3 l

The cooling pump is located at the front of the cylinder block and is driven by the timing belt of the camshaft (figure E:3).



To remove the pump, drain the coolant from the system as described above, remove the alternator drive belt and toothed belt (see chapter "Engine 1.1/1.3").

Remove the rear plate of the timing belt cover. The three lower plate mounting bolts simultaneously hold the cooling pump in the cylinder block. Remove the pump together with the sealing ring from the niche in the cylinder block.

Install the new pump in the reverse order of removal. Replace the sealing ring if it is damaged or leaks fluid. Before finally tightening the bolts, install the toothed belt and adjust its tension by turning the cooling pump. The belt tension should be such that the longest branch of the belt can be twisted 90 degrees with your fingers (see section "Toothed belt" chapters "Engine 1.1/1.3"). After tensioning the belt, finally tighten the bolts securing the pump and the rear plate of the timing belt cover.

Engine 1.5/1.6/1.8 l

The cooling pump is located in a housing attached to the front of the cylinder block and is driven by the alternator drive belt (figure E:4).

It is recommended to remove the pump from the cylinder block together with its housing (otherwise, to gain access to the pump cover mounting bolts, you will have to remove the crankshaft pulley, timing belt and auxiliary shaft sprocket).

Loosen the alternator mounting bolts, rotate the alternator upward toward the cylinder block and remove the drive belt.

Remove the three bolts securing the pulley to the cooling pump hub.

Disconnect the lower radiator hose from the lower pump hose and drain the cooling system.

Disconnect the hoses from the rear of the pump housing. Remove the four bolts securing the pump housing to the cylinder block and remove the pump assembly. If the pump housing is stuck to the cylinder block, tap the housing lightly to free it.

Loosen the nuts and bolts and separate the pump cover from the housing.

Install the new pump in the reverse order of removal.

Make sure that the mating surfaces of the cover and pump body are free of any old gasket residue. Use new gaskets when reassembling. Tighten the bolts to the torque specified in Section "Technical data".

When installing the pump on the cylinder block, install a new sealing ring. Tighten the pump mounting bolts to 2.0 kg·m.

Adjust the tension of the alternator drive belt so that its deflection when pressed with a finger in the middle between the alternator and crankshaft pulleys is approximately 12 mm.