Honda 15100-P8E-A01 Pump Assembly, Oil (Yamada)

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Remove the crankshaft position sensor. Remove the timing belt, crankshaft sprocket, and idler pulley. Remove the oil pan and oil pick-up screen. If equipped, remove the oil level sensor. Remove the oil filter adapter housing/VTEC solenoid assembly (4WD models) from the front of the oil pump. Remove the bolts and detach the oil pump housing from the engine. You may have to pry carefully between the main bearing cap and the pump housing with a screwdriver. Use a Phillips screwdriver to remove the screws holding the pump cover to the rear of the housing. Lift the cover off and inspect the pump rotors. If any wear or damage is evident, replace the pump. Check the rotor clearance with a feeler gauge and compare it. Use a scraper to remove any traces of old sealant from the pump body and engine block, being careful not to damage the delicate aluminum. Replace the old crankshaft oil seal. Apply engine oil or multi-purpose grease to the seal lip. Pack the pump cavities with petroleum jelly and install the cover. Apply thread-locking compound to the threads and tighten the screws. Use acetone or lacquer thinner and a clean rag to remove all traces of oil from the gasket surfaces. Apply a bead of anaerobic sealant to the oil pump flange and the threads of the mounting bolts. Avoid using an excessive amount of sealant, especially around oil passages and bolt holes. Parts must be assembled within five minutes of sealant application, otherwise, the material must be removed and reapplied. Wherever O-rings are employed, use new ones. Engage the flat surfaces on the oil pump drive rotor with the matching flats on the crankshaft and slide the pump into place. Install the pump mounting bolts in their original locations and tighten them. Using a new O-ring, install the oil pick-up screen and tighten the fasteners. Reinstall the remaining parts in the reverse order of removal. Wait 30 minutes to allow the sealant to cure, then add oil, start the engine, and check for oil leaks and pressure. Recheck the engine oil level after operating the engine.

Engage the oil pump drive rotor with the crankshaft, slide the pump into place, install the mounting bolts in their original locations, and tighten them in a criss-cross pattern.