Position the engine at top dead centre of the number one cylinder. Remove the distributor cap and mark the position of the rotor to distributor housing. Remove oil pump attaching bolts and separate pump and driveshaft from engine. If need be, use needle nose pliers to uncouple oil pump driveshaft from crankshaft drive gear. In order to access the oil pump pick-up tube, remove the oil pan. Lift off the pick-up to detach it from engine by removing its mounting bolts. Unbolt oil pump cover(s) from body, then pull out rotors inboard and outboard of it. Inspect for wear or damage all components and clean them thoroughly. Take apart relief valve and check for any damage on it. Then compare results with feeler gauge measurements of oil pump component clearances using same method as before. Go ahead to put together oil pump components followed by pouring clean engine oil into cavity provided for this purpose in oil pump. Next, tighten fasteners after fitting new gasket over cover during assembly process of an oil pump unit. Lower timing chain cover needs a new gasket while installing on a pump bodytowards lower end of an oil pump unit being installed. The aligned marks must be checked after inserting an oil driveshaft into an end portion of an oillpump that is aligned with marks made already as referred above in step 5.To install an oil pump ontothe engine make sure that those aligning marks remain intact and you are good to go.Installation continues with installation of all remainingmounting bolts meant for fixing downoil pumps onto engines.As such, if you removed your sump or took off your pickup tube then put a new gasketon its face back side again and reinstall pan back over wherein it was.If necessary replace old filter with another one which is brand-new; also pour somefreshly added engine-oil inside crankcase." It is time now to start this machine and see if its oil pressure is enough; at thesame time check if there is any leaking. Check engine oil level once again just to be sure.
