Things You'll Need:
- Spark plug tool
- Automotive engine cleaner
- Valve cover gasket sealer
- Flat head screwdriver
- 10 mm socket
- Valve cover gasket
- Valve cover gasket kit
- 5/8 to 3/8 spark plug socket and wrench
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Step 1
Allow the car to cool. Disconnect the battery terminal. Remove the right side vent screen top extension. Disconnect the ignition coil with power transistor and its wiring and brackets.
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Step 2
Unplug the electrical connections from the intake manifold runner control actuator. Remove the spark plug wires, valve cover bolts and the valve cover. Unfasten the actuator retaining the screws. Disconnect the left hand side coil wires and spark plug wires.
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Step 3
Remove the heated positive crankcase ventilation (PCV) valve. Remove the heated oxygen sensor plug and the Differential Pressure Feedback EGR (DPFE) sensor. Disconnect the ignition coil with power transistor and its wiring and bracket. Remove the valve cover bolts, the valve cover and the old valve cover gasket. Clean the valve cover seating area with automotive engine cleaner and place the new gasket in the gasket seating area.
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Step 4
Replace the parts that were removed and disconnected by reversing the steps. Replace the valve cover gasket and tighten the bolts, in sequence, ensuring not to over tighten. Put back the ignition coil with power transistor and its wiring and bracket, the heated PCV valve, the heated oxygen sensor plug and the DPFE sensor.
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Step 5
Check the oil stick to determine the oil level and fill the oil container to make sure that the car has enough oil in it. Start the car and let it idle for a while. The maintenance is now complete on your Nissan Pathfinder.
