Japanese automobile manufacturer, Nissan Motor Company, released the VQ series of engines in 1994. These V6 motors are still being produced for a number of Nissan, Infiniti, and other Nissan partnerships. In 2005, Nissan released the VQ series of V6 motors in 2.3L, 2.5L, 3.0L, 3.5L, and 4.0L displacements. All of these six-cylinder blocks were aluminum-forged and featured a dual, overhead-camshaft (DOHC) design. Despite the differences in sizes and performance output, all of the Nissan V6 powerhouses from 2005 should be tuned and maintained accordingly.
Lift the front end of your vehicle off the ground to access the oil pan and filter. Use the provided jack that came factory with your vehicle.
Place the oil recycle container below the oil pan. Contact your local dealer on proper methods of oil disposal.
Remove the plug from the bottom of the oil pain. Drain the old oil completely and replace plug when finished.
Use the necessary wrench to loosen and remove the old oil filter.
Add oil to the new filter until it is 2/3 full. Hand-screw new filter into place.
Use the funnel to add oil to the engine's oil compartment. Monitor the levels for adequacy by checking the dipstick. Add oil as necessary.
Disconnect the negative connection from the engine's battery. Replacing ignition parts is dangerous, so electrical current should be halted.
Unhook the spark plug wires from the respective plugs one at a time. Inspect plugs and wires for corrosion, overheating, wetness, or any other damage-related signs.
Remove the plugs and wires that show signs of wear. These parts are cheap and much more effective new than trying to clean or repair.
Use your hand to replace the old spark plugs with new. Replace worn wires accordingly.
Reattach all wires to the necessary plugs.
Use the necessary wrench to loosen the bolts that connect the air filter of the VQ engine with the rest of the air intake system. Air filters need to be replaced periodically because of clogging and engine lubricant build-up to maximize air flow throughout the engine.
Lift the air filter slowly from its current spot. The old filter will be full of build-up, so try and minimize how much is spilled onto the engine.
Clean the intake system tube and engine area around the intake. All debris and dust should be eradicated from the VQ motor.
Lower the new air filter into place slowly. Align the new filter with the intake system.
Tighten the bolts that hold the filter into place with the necessary wrench.
