Spark Plug: Service and Repair

REMOVAL

CAUTION: When disconnecting a high tension cable from a spark plug or from the ignition coil, twist the rubber boot slightly (1/2 turn) to break it loose. Grasp the boot (not the cable) and pull it off with a steady, even force.




1. Twist and pull the metal clad spark plug cable boots (2) to remove them from the spark plugs.

NOTE: Avoid allowing debris to fall into the spark plug holes during replacement.




2. Clean the cylinder head spark plug recesses (2) using low pressure compressed air.

CAUTION: Do not use power tools to replace spark plugs. Damage to the cylinder head can result.

3. Use a rubber insulated spark plug socket and a hand ratchet to remove the spark plugs (1).
4. Remove the spark plugs (1) from the engine.

INSTALLATION




1. Using a spark plug gap gauge (1), gap the spark plugs to 1.02 mm (.040 in.) before installation.
2. Start the spark plugs into the cylinder head by hand to avoid cross threading.
3. Tighten the spark plugs to 28 N.m (21 ft. lbs.).

NOTE: When installing the spark plug cables, route the cables correctly. Failure to route the cables properly can cause improper spark plug phase shift.




4. Install the spark plug cables to the appropriate spark plug location (G & K) (plug side).

NOTE:
- Refer to the reference pad cast into the cylinder head cover to identify proper spark plug/spark plug cable orientation.
- When installing spark plug cables, insure a positive connection is made. A snap should be felt when a good connection is made between the spark plug cable and the spark plug.




5. Insure a firm connection is made from the spark plug cables (2) to the spark plugs.