Operation CHARM: Car repair manuals for everyone.
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

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Spark Plug Check and Cleaning

Spark Plug Check And Cleaning:





1. Remove the spark plug cables.

CAUTION: When pulling the spark plug cable boot from the plug, always hold the boot, not the cable.

2. Remove the spark plugs.
3. Check for a burned-out electrode or damaged insulator. Check for even burning.
4. Remove carbon deposits with wire brush or plug cleaner. Remove sand from plug screw with compressed air.
5. Use a gap gauge to check the plug gap.

Standard value: 0.7 - 0.8 mm (0.028 - 0.031 in.)

If the plug gap is not within the standard value range, adjust by bending the ground electrode.
6. Clean the engine plug holes.

CAUTION: Do not allow foreign matter to enter the cylinders.

7. Install the spark plugs.