Because of the issues connected with the removal of the oil pump, the removal of the oil pump must be done during major overhaul of the engine when the car engine is out of the car. Starting should be done by removing the oil pan followed by the oil pick-up tube as well as the screen. subsequently, unscrew the engine front cover, timing chains and crankshaft sprockets. Ease all the four oil pump mounting bolts by a quarter turn and then in several progressive turns. When all bolts are turned counter clockwise and loosened, then withdraw the oil pump along with it. When wanting to check the oil pump lightly unscrew the cover of the pump body and in particular observing identification signs of the rotors before their withdrawal from the pump body. Wash all components and ensure that they are dry then check the rotors for signs of wear or damage; if it is scored or damaged, then the entire oil pump assembly has to be replaced. If the condition of the components is good, submerge the rotors in clean engine oil and place them back into the pump body paying due attention to the orientation of the identification marks. Finally use screws to fix the cover in place.. For the installation of this component, the oil pump inner rotor should be turned to sit on the flats provided on the crankshaft; after doing this, then the oil pump should be placed over the crankshaft and fitted into the cylinder block. The oil pump bolts can be fitted and hand tight which is followed by tightening it by using tap gradually and uniformly with the torque limit mentioned. Put back the others in a sequential manner and add fresh oil in the engine compartment then install a new oil filter and add some coolants in the cooling system. Last, turn on the engine to comprehend if there aren't leakages.
