Nissan 15010-4S100 Pump-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.

To remove the oil pump, you must first disconnect the timing belt and crankshaft sprocket. Then, take out the oil pan. Then, the alternator and its supports can be removed. Unbolt power steering pump and set aside without removing hoses. Remove power steering pump bracket. Detach the support bracket for oil pick-up tube and then unscrew bolts holding it on an oil pump. Take out all front bolts of an engine block that hold oil pump to it . Pry the oil pump outwards to break the gasket seal and detach it from dowels in engine block . Use a scraper to remove old gasket material and sealer from both surfaces where oil pumps contact engine blocks . Lacquer thinner or acetone should be used to clean these mating surfaces. If you want to check an oil pump, get off screws in rear cover and wash all parts with solvent . Check wear and damage . Remove cap of the oil pressure regulator along with washer , spring as well as valve . Inspect the sliding surface of this valve for wear as well as deformation and also check spring for free length . Regulator valve should be replaced if any of those parts are damaged Every other part including valves must have clearances checked to see if they meet specific criteria that require such test whereafter measurements are made forcefully tightened into given areas with means of tightening tools These figures are compared against hard copy measurements usually saved for future reference during any breakdown because even slightest differences mean lots more work ahead somewhere down line so this prevents need further trips back Each time one opens up his/her machine one needs start again by assembling new set including complete special wrenches Care should be used when installing nuts on both ends since some of them may already have been removed earlier during disassembly process Since each end is equipped with unique type fasteners made specifically for equipment being repaired do not mix these two types up Reinstall lower timing belt rear seals between rubber end cap of oil pump and the rearmost timing cover Finally, install the oil pick-up tube with a new O-ring on its flange.

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.

To remove the oil pump, first, remove the oil pump-to-engine block bolts from the front of the engine. Then, pry the oil pump outward to break the gasket seal and remove it from the dowels on the engine block.

To remove the oil pump housing, pivot the tensioner arm/chain guide over to the left side, remove the oil pans, remove the oil pump pick-up tube, and then gently pry the oil pump housing outward enough to clear the dowel pins on the engine block.

Remove the bolt(s) retaining the oil pump cover to the oil pump body, then lift out the inner and outer rotors. Clean all the components and inspect for wear and damage. Disassemble the relief valve and check for any damage. Check the oil pump component clearance with a feeler gauge and compare the results.