Nissan 15010-8J101 Oil Pump Assembly

To have access to the timing belt and crankshaft sprocket, it is necessary to first, strip the oil pan. Subsequently, take out the adjusting bar of the alternator and the bolt that fixes the bar to the oil pump. Take out the bolts of the power steering pump and unbolt it along with the hoses but without disconnecting them and set it aside, then removed the power steering pump bracket. Remove the oil pump to engine block bolts using the caution that you can leave the pickup tube and oil filter adapter connected to the pump if needed. Remove the oil pump gasket seal by striking it with a hammer having the tip of a block of wood on the top of the oil pump gasket seal, then, extract the oil pump from the engine block. Next, scrape and solvent the mating surfaces due to mating. For check, unscrew the bolt that is used to secure the rear cover of the oil pump to the pump, wash the components and check for wear and tear. The oil pressure regulator cap and washer, the spring and the valve should be removed and the condition of the sliding surface and of the spring should be carefully checked; as both the cap and washer, spring and valve are sold only as a complete set, since they are written off together. Using a feeler gauge check the calibration of the respective parts of the oil pump and if the clearance is high change the entire oil pump. Coat the pump in petroleum jelly to prepare the pump for moving the oil; fit the oil pump; and properly fasten the screws. Screw in the oil pressure regulator valve spring followed by the washer and the cap after it had been tightened. It is also recommended to change the O-ring on the flange of the pick-up tube oil and re-attach and tighten the bolts of the pick-up tube. To install, use ATV sealant on the surface that attaches to the oil pump, and replace any components that have been unbolted with new gaskets, and re-establish the reverse of the process of removal. Place the flats on the crankshaft to fit the flats on the oil pump gear, then tighten all bolts.

To remove the main timing chain and crankshaft sprocket, it is not necessary to take out the secondary timing chains or the main timing chain tensioner/chain guide assembly; simply remove the tensioner and pivot the chain guide to the left to allow for the removal of the oil pump housing. Next, take off the oil pans and the oil pump pick-up tube, then remove the oil pump-to-engine block bolts from the front of the engine. Gently pry the oil pump housing outward to clear the dowel pins on the engine block and remove it. For inspection, use a large Phillips screwdriver to take off the screws holding the front cover on the oil pump housing, clean all components with solvent, and inspect for wear and damage. Remove the oil pressure regulator cap, washer, springs, and valve, checking the sliding surface of the valve and the valve spring; if either is damaged, replace them as a set. Check the clearance of the oil pump components with a feeler gauge and compare the measurements, ensuring to pack the pump with petroleum jelly to prime it. If any clearance is excessive, replace the entire oil pump assembly, again packing it with petroleum jelly before assembly. For installation, use new gaskets on all disassembled parts and reverse the removal procedure, aligning the flats on the crankshaft with those on the oil pump gear, and tighten all fasteners to the specified torque, ensuring to replace the O-rings in the oil pump housing and engine block before installing the oil pan.

Use a large Phillips screwdriver to take off the screws holding the front cover on the oil pump housing. Clean all components with solvent and inspect for wear and damage.

Gently pry the oil pump housing outward to clear the dowel pins on the engine block and remove it.

To install the oil pump, place the oil pump-to-block gasket over the dowels on the engine block. Align the flats on the crankshaft with the flats on the oil pump rotor and position the oil pump on the engine block. Install the mounting bolts and tighten all fasteners to the specific torque.