Honda 15100-5A2-A03 Pump Assembly, Oil

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To remove the timing chain cover, first take off the screws from the oil pump cover connected to the timing chain cover, then separate the oil pump cover from the timing chain cover and disassemble the oil pump, using an impact screwdriver if necessary to avoid stripping the screw heads. Next, check the oil pump rotor-to-cover clearance, tooth tip clearance, and rotor-to-body clearance using a feeler gauge and straightedge, ensuring that measurements do not exceed specified limits; replace the pump if they do. Remove the pressure relief valve plug and extract the spring and plunger, inspecting the spring for distortion and the plunger for scoring, replacing parts as needed. Install the pump rotors, packing the spaces between them with petroleum jelly to prime the pump, then apply thread locking compound to the pump cover screws, install the cover, and tighten the screws to the specified torque. Install the oil pressure relief valve and spring assembly, using a new sealing washer on the plug and tightening it securely. For installation, apply a thin coat of anaerobic sealant to the timing chain cover-to-block sealing surface and new O-rings in the engine cover, then install the timing chain cover to the engine block and tighten the bolts to the specified torque. Finally, complete the installation in reverse order, adding the correct type and quantity of oil and coolant, running the engine, and checking for leaks.

Check the oil pump rotor-to-housing clearance, tooth tip clearance, and rotor-to-body clearance using a feeler gauge and straight-edge.