The water pump in your Rover 200 must be continually maintained and serviced to ensure the best performance when cooling the engine. If the water pump does not work correctly, it will no longer be able to move coolant from the radiator to the engine. You can pick up the water pump needed for your Rover from your local auto store.
Turn off the engine and allow it to cool. Pop the bonnet of the Rover. Use a wrench to loosen the bolt on the clamp that holds the negative cable in place. Lift the negative cable off the battery terminal.
Get a drain pan and place it underneath the radiator. Release the drain locks on the lower right-hand side of the radiator. Drain the coolant into the drain pan. Close the drain locks when the coolant is fully removed.
Use a wrench to remove the mounting bolts attached to the radiator shroud and fan. Lift them from the vehicle and place them in a safe area. Use a nut driver to remove the bolt on the lower radiator hose clamp. Disconnect the radiator hose from the water pump.
Use a nut driver to remove the bolt attached to the drive belt tensioner. This will loosen the belt and allow you to remove it from the vehicle. Remove the mounting bolts from the water pump and lift it from the Rover.
Attach the new water pump to the same place from which you removed the old one. Fix in place with the mounting bolts. Place the drive belt on the tensioner and tighten the bolt on the tensioner to fix it in place. Attach the lower radiator hose to the water pump and fix it in place with the clamp.
Remove the radiator cap from the radiator and place the coolant into the radiator. Reattach the cap. Place the negative battery cable back on the battery terminal and tighten it in place with the clamps. Turn on the engine to check that the water pump now works correctly.