To remove and install, first disconnect the negative battery terminal. Drain the cooling system as previously described. For 1.5 litre models, remove the engine timing belt, then the retaining bolt to withdraw the timing belt tensioner. Next, remove the bolt retaining the alternator adjusting bracket to the water pump, loosen the adjuster lock bolt, and slide the bracket clear. Remove the water pump retaining bolts, noting the length of each, and use a twisting motion to free the pump from the transfer pipe, discarding the O ring. For 1.8 and 2.0 litre models, remove the timing belt, then the retaining bolts to withdraw the rear timing belt cover, and remove the water pump using a twisting motion while noting the installed position of the retaining bolts. For 2.4 litre models, remove the timing belt, then the tensioner assembly and the tensioner arm and pulley assembly. Remove the water pump retaining bolts, noting their positions, and tap the water pump from the engine with a rubber mallet, disconnecting it from the transfer pipe, while discarding the O ring and gasket. Use a sharp scraper to remove old sealant from the mating face of the cylinder block and the water pump if it is to be reused. Check the water pump drain holes for signs of coolant leakage, indicating a leaking seal or worn bearing, and rotate the water pump by hand to check for smooth rotation and wear. Installation is a reversal of the removal procedure with attention to installing a new O ring to the transfer pipe, lubricating it with water or coolant, applying a 2.4 - 3mm bead of Loctite Blue Maxx or equivalent sealant to the mating face of the water pump, and ensuring the retaining bolts are installed to their noted positions. Tighten the retaining bolts to the specified torque, ensure the timing belt is correctly installed and adjusted, install and adjust the drive belts, fill the cooling system, and finally road test the vehicle while checking for coolant leaks.