To service a gasoline engine, start by and disconnecting the oil pan assembly and to eliminate the oil pump, you should unbolt it. Introduce clean engine oil through the inlet or out let port of the oil pump and thereafter turn the pump shaft to distribute the oil. Replace the pump and fasten the mounting bolts to the prescribed torque setting for the various engine capacities Do not force the pump because if it does not fit well, there will be misalignment. Last but not the least; refit the oil pan, and as already pointed out the pumps cannot be rebuilt and must be replaced if found unserviceable. For 2.2L diesel engines a ground cable should be removed from the battery, the oil pan should be unbolted and the oil pump outlet tube should be disconnected. New tap then the pump outlet tube with teflon tape on the set screws, secured the pipe outlet with a new gasket and tighten the bolts where the old pump used to be. After raising the oil filler cap, add the right oil in the crankcase then turn off the cooling system and release pressure before connecting the battery. For 2.3L diesel engines, you need to start with the removal of battery cable and plethora of components like the cooling fan and timing belt covers among others. Subsequently to the removal of the oil pan bolts and the required parts, pull out the oil pump with its gears. When installing perform the following; ensure that the silent shaft and oil pump gears are synchronised, put on the front cover with new gasket and tighten all components to the recommended torque. Last but not the least, refit the oil pan, set the timing belts, and join the battery terminals, ensure for oil seepage after the running of the engine.