For 2014 and earlier models, begin by removing the oil pan. While supporting the oil pump, unscrew the bolt holding the oil pump to the rear main bearing cap, then remove the pump. Lower the pump and take it out along with the pump driveshaft, ensuring that the hard nylon sleeve used for alignment is in place on the oil pump driveshaft; if not, check the oil pan for pieces of the sleeve, clean them out, and obtain a new sleeve. Inspect the screen and pickup tube for damage or looseness, ensuring a light fit onto the oil pump. If a new oil pump is being installed, confirm that the pump driveshaft is properly mated with the shaft inside the pump. Position the pump on the engine, aligning the slot in the upper end of the driveshaft with the tang on the lower end of the distributor shaft, as proper mating is essential. Install and tighten the mounting bolt to the specified torque, then reinstall the oil pan. For 2018 and later models, start by removing the timing chain cover and the oil pan. Install special tool EN-51257 against the timing chain tensioner and the edge of the oil pump body, tightening the mounting bolts securely. Remove the oil pump mounting bolts and slide the pump off the crankshaft. If the oil pump is being removed without replacement, ensure that special tool EN-51267 is installed to the engine block and against the pump before removal, remaining in place until reinstallation; failure to do so necessitates installing a new oil pump. Remove the oil pump cover and withdraw the rotors, cleaning the components with solvent, drying them thoroughly, and inspecting for damage, including checking bolt holes and splined surfaces for wear. If any components are scored or worn, replace the entire oil pump assembly. Prime the pump by pouring clean engine oil into the pickup tube hole while turning the pump by hand. Position the oil pump over the crankshaft, aligning the teeth on the crankshaft sprocket with those on the oil pump drive gear, ensuring the pump is fully seated against the block. Push the pump body upward to maintain contact with the tool while tightening the bolts, ensuring no gap exists between the oil pump housing and the tool; if a gap is present, loosen the bolts, push the pump against the tool, and retighten. Install and tighten the oil pump mounting bolts to the specified torque, then align and install the timing chain cover and the oil pan. Complete the installation in reverse order of removal, adding oil and coolant as necessary, running the engine, and checking for leaks and oil pressure.
