It is not economical or practical to overhaul a water pump. If failure occurs, a new or rebuilt unit should be purchased to replace the faulty water pump. First, disconnect the negative battery cable. Then, drain the radiator. Remove the generator drivebelt. If equipped, remove the power steering drivebelt and the
A/C Compressor drivebelt. Disconnect the coolant hoses from the water pump. Remove the water pump mounting bolts and lift out the pump. On L4 engines equipped with air conditioning, it may be necessary to remove the A/C compressor from its mounts in order to gain enough clearance to remove the water pump. If installing a new or rebuilt pump, transfer the pulley from the old unit to the new one. Ensure the sealing surfaces are clean of any foreign material. Then place a bead of gasket sealant on the pump sealing surface. While the sealant is still wet, install the pump and torque the mounting bolts to specs. The remainder of the installation is the reverse of the removal procedure. Adjust all drivebelts to the proper tension. Connect the negative battery cable and fill the radiator with a mixture of ethylene glycol antifreeze and water in a 50/50 mixture. Start the engine and allow to idle until the upper radiator hose gets hot. Check for leaks. With the engine hot, fill with more coolant mixture until the level is at the bottom of the filler neck. Install radiator cap and check coolant level periodically over the next few miles of driving.