The Nissan Stanza is a 4-door sedan that was in production from 1977 to 1992, when Nissan replaced it with the Altima. The 1992 model is a fourth generation Stanza, which Nissan manufactured from 1990 to 1992. These vehicles had a 4-cylinder 2.4-liter engine with an oil pump assembly that includes an inner and outer gear. The oil pump assembly in the 1992 Nissan Stanza is inside the front engine cover.
Tools Used: Tools, Socket wrench set, Petroleum jelly, Torque wrench
Replace the Oil Pump
Remove the cable to the negative battery terminal with a socket wrench. This will prevent you from starting the engine during the oil pump replacement. Disconnect the front engine cover with the oil strainer tube still attached. Discard the seal for the engine cover. Use the socket wrench to loosen the retaining screw for the cover to the oil pump. Remove the oil pump cover from the front engine cover. Remove the mounting bolts for the oil pump assembly and detach the inner and outer gears for the oil pump assembly from the engine.
Clean the mating surfaces and the gear cavity for the new oil pump. Install the outer gear into the gear cavity and install the inner gear with the grooved side facing the oil pump cover. Ensure that the gears mesh together and fill gear cavity of the oil the pump with petroleum jelly. Install the oil pump and torque the mounting bolts to between 12 and 15 ft. lbs. with a torque wrench. Connect the oil pump cover and torque the retaining screw to between 2.2 and 3.6 ft. lbs. Install a new seal for the front engine cover and connect the cover with a socket wrench. Connect the cable to the negative battery terminal with a socket wrench. Start the engine and check for oil leaks.