Removal the coolant pump (Chevrolet Lanos T150)

We replace the pump as an assembly if bearing noise appears or if the pulley rotates with difficulty when the timing belt is removed, there is large radial play in the pump shaft, or if fluid leaks from the inspection hole.

For greater clarity, the work is shown on a dismantled engine.

Drain the coolant (see Replacing the coolant).



Remove the camshaft pulley (see Replacing the camshaft seal).



Using a 10 mm socket, unscrew the four bolts securing the rear timing belt cover…



…and we take it off.





Using a 5 mm Allen key, unscrew the three screws securing the pump to the cylinder block.



We remove the pump from the cylinder block socket.

Before installing the pump, clean the mating surface of the cylinder block.

We install a new rubber sealing ring into the groove of the pump body.

When subsequently adjusting the timing belt tension, it is necessary to turn the pump installed in the cylinder block socket.

Therefore, to maintain the sealing properties of the ring, we recommend applying a layer of silicone grease to it, which reduces friction in moving joints.



Aerosol silicone lubricant.



We install the coolant pump in the reverse order.



In this case, it is necessary to ensure that the groove on the pump body is positioned as shown in the photograph.

The final tightening of the pump mounting screws is performed after installing the timing belt (see Checking the condition and replacing the timing belt).

[The article was reprinted from the website «CHEVYMAN»]