- Remove the spark plug boot by twisting and pulling it off the plug.
- Use a 16mm spark plug wrench to loosen and remove the old spark plug.
- Inspect the spark plug and replace if necessary.
- Reinstall the new or inspected spark plug.
- Finger-tighten the spark plug until it is snug.
- Use the spark plug wrench to tighten the spark plug an additional 1/4 turn.
- Reinstall the spark plug boot.