REMOVAL
LH side
- Disconnect the crankcase vent tube quick connect coupling from the valve cover fitting and position aside. For additional information, refer to «FUEL SYSTEM - GENERAL INFORMATION»(ref-292568) article.
- Remove the upper intake manifold. For additional information, refer to «ENGINE - 3.5L»(ref-292564) article.
- Disconnect the 6 ignition coil-on-plug electrical connectors.
- Remove the 6 bolts and the 6 ignition coil-on-plugs.
- Remove the 6 spark plugs.
INSTALLATION
Both sides
- Inspect the 6 spark plugs. Item Part Number Description 1 - Deposits bridging spark plug gap 2 - Wet black deposits (oil fouling) 3 - Dry black deposits (carbon fouling) 4 - Normal spark plug 5 - Pre-ignition 6 - Overheating 7 - Fused spot deposits
- Adjust the spark plug gap as necessary.
- Install the 6 spark plugs. Tighten to 15 Nm (11 lb-ft).
- Install the 6 ignition coil-on-plugs and the 6 bolts. Tighten to 7 Nm (62 lb-in).
- Connect the 6 ignition coil-on-plug electrical connectors.
- Install the upper intake manifold. For additional information, refer to «ENGINE - 3.5L»(ref-292564) article.
- Position and connect the crankcase vent tube quick connect coupling to the valve cover fitting. For additional information, refer to «FUEL SYSTEM - GENERAL INFORMATION»(ref-292568) article.