Spark Plugs
5.
With the plug washers attached, thread the spark plugs in by hand to prevent
cross-threading.
6.
Tighten each spark plug:
1/8-1/4 turn after it seats (if the old plug is good)
1/2 turn after it seats (if installing a new plug)
Improperly tightened spark plugs can damage the engine. If a plug is too loose,
a piston may be damaged. If a plug is too tight, the threads may be damaged.
7.
Reinstall the spark plug caps. Take care to avoid pinching any cables or wires.
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Servicing Your Honda