Nissan 15010-8J101 Pump Assembly-Oil

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Remove the primary timing chain and the crankshaft sprocket. It is not necessary to remove the camshaft sprockets, the camshaft sprocket bolts, the secondary timing chains or the primary timing chain tensioner pivot arm/chain guide during this procedure. Simply pivot the tensioner arm/chain guide over to the left side to allow removal of the oil pump housing. Remove the oil pans. Remove the oil pump pick-up tube. Remove the oil pump-to-engine block bolts from the front of the engine. Gently pry the oil pump housing outward enough to clear the dowel pins on the engine block and remove it from the engine. Use a large Phillips screwdriver to remove the screws holding the front cover on the oil pump housing. Clean all components with solvent, then inspect them for wear and damage. Remove the oil pressure regulator cap, washer, spring(s) and valve. Check the oil pressure regulator valve sliding surface and valve spring. If either the spring or the valve is damaged, they must be replaced as a set. Check the clearance of the following oil pump components with a feeler gauge and compare the measurements to the specific clearances: Rotor tooth tip clearance, Outer rotor-to-body clearance, Cover-to-inner rotor clearance, Cover-to-outer rotor clearance, Inner rotor ridge clearance. If any clearance is excessive, replace the entire oil pump assembly. Pack the pump with petroleum jelly to prime it. Assemble the oil pump and tighten the screws securely. Install the oil pressure regulator valve. spring and washer, then tighten the oil pressure regulator valve cap. Use new gaskets on all disassembled parts and reverse the removal procedure for installation. Align the flats on the crankshaft with the flats on the oil pump gear. Tighten all fasteners to the specific torque. Before installing the oil pan, be sure to replace the O-rings on the oil pump housing and engine block.

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.

Position the engine at TDC (Top Dead Center) for number one cylinder. Remove the distributor cap and mark the position of the rotor to the distributor body.

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.

Use a block of wood and a hammer to break the oil pump gasket seal, then pull out the oil pump from the engine block.

No, it is not necessary to remove the secondary timing chains or the main timing chain tensioner/chain guide assembly. You can simply remove the tensioner and pivot the chain guide to the left to allow for the removal of the oil pump housing.