Jeep 53021622AE Pump-Engine Oil

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It is necessary that one should not at all remove the relief valve for oil pressure, spring and plunger from oil pump. Replace the entire oil pump as a unit in case its pressure relief valve is damaged. REMOVAL: Remove timing belt and crankshaft sprocket. Take out the oil pan. Remove the pick-up tube of the oil pump. Then, pull off the block bolts for the oil-pump-to-block and take out the pump from there. INSPECTION: Unbolt back cover of oil pump housing. Remove inner and outer rotors from body of the oil pump observing their installed directions so that they can be rearranged correctly. In solvent clean all parts thoroughly carefully inspecting rotors, pump cover, and oil pump housing for nicks, scratches or burrs.Replacement is required if any part of it is broken.Measure warpage of an oil pump cover using feeler gauge.If it exceeds limit then you have to replace a turbine.Measure thickness and diameter of outer rotor.If either value is less than this value then change turbine can be done.Find thickness of an inner rotor.If measurement is less than this value then turbine can be replaced.Then put external rotor into housing right after examine clearance between housing and rotor's opposite side with your finger.If this gap exceeds maximum allowed clearances then it could be replaced.Turn on crankshaft until flats align with flats on rotor.Continue installation by placing gasket onto engine block mating surface followed by putting those flats in position where they face each other.The torque applied on these blocks should make sure that they are tight enough.The rest part consists in reversing what has been removed previously.

Align the rotor flats with the crankshaft flats and push the oil pump into position against the block.

Inspect all components for wear and damage. Remove the front cover on the oil pump housing and clean all components with solvent. Check the oil pressure relief valve sliding surface and valve spring, replacing them if damaged. Use a feeler gauge and a micrometer or dial caliper to check the clearance of various oil pump components and compare the measurements to the specified clearance. If any clearance is excessive, replace the entire oil pump assembly.

To remove the oil pump, first remove the bolt from the pick-up tube assembly and lower it away from the oil pump. Then, remove the oil pump mounting bolts and detach the pump from the engine block.

Remove the timing belt and crankshaft sprocket. Remove the oil pan. Remove the oil pump pick-up tube. Remove the oil-pump-to-block bolts and pull the oil pump from the block.

To install the oil pump, position it on the engine and ensure that the pump rotor is aligned with the crankshaft drive. Then, install the oil pump mounting bolts and tighten them to the specified torque. Install a new O-ring onto the oil pump pick-up tube, connect the tube to the pump, and tighten the bolt to the specified torque. The remainder of the installation is the reverse of removal.

The assembly should be replaced if it is damaged, if the pump cover is warped more than the limit, if the thickness and diameter of the outer rotor measurements are less than the value, if the thickness of the inner rotor measurement is less than the value, if the clearances between the rotors and housing are more than the maximum allowable clearances, and if the clearance between the lobes on the inner and outer rotors is more than the value.

The oil pumps have an expansion plug instead of a threaded plug to seal the oil pressure relief valve and spring inside.

Next, drain the cooling system.

To remove the oil pump, first remove the bolt from the pick-up tube assembly and lower it away from the oil pump. Then, remove the oil pump mounting bolts and detach the pump from the engine block.

Inspect all components for wear and damage. Remove the front cover on the oil pump housing and clean all components with solvent. Check the oil pressure relief valve sliding surface and valve spring, replacing them if damaged. Use a feeler gauge and a micrometer or dial caliper to check the clearance of various oil pump components and compare the measurements to the specified clearance. If any clearance is excessive, replace the entire oil pump assembly.