Nissan Xterra Oil Pump Installationby James Marshall
The Nissan Xterra is a compact sport utility vehicle intended for off-road use. Nissan began production of this product line in 2000, and the most recent generation of the Xterra includes 2005 and later models. The only engine available for the Nissan Xterra is a six-cylinder 4.0-liter engine, which has the oil pump on the front of the crankcase. You may need to replace the oil pump if your engine is showing unexpected wear, even though the oil is at its proper level.
Remove the cable on the negative battery terminal with a socket wrench so that you don't start the engine during the procedure. Place a container under the oil drain in the crankcase and open the oil drain. Allow the oil to drain into the container and replace the plug for the oil drain.
Place a second container under the drain for the radiator and remove the drain plug for the radiator with a socket wrench. Wait for the coolant to drain into the container and replace the radiator drain plug.
Remove the mounting bolts for the upper and lower oil pans with a socket wrench. Detach both oil pans from the crankcase.
Disconnect the mounting bolts on the case for the front timing chain with a socket wrench. Remove the front timing chain.
Remove the mounting bolts for the oil pump cover with a socket wrench and detach the oil pump cover. Disconnect the bolts for the oil pump and remove the oil pump.
Install the new oil pump and fasten the mounting bolts with a socket wrench. Attach the oil pump cover. Connect the front timing chain and install the cover for the front timing chain.
Add a layer of sealant to the mounting surfaces of the oil pans and install the oil pans. Allow the sealant to cure for 30 minutes before you add oil.
Fill the crankcase with the proper amount of oil and coolant. Start the engine and check for oil and coolant leaks.