HOW TO CHANGE SPARK PLUG

SPARK PLUG INSPECTION

Remove the spark plug with a spark plug wrench and visually check conditions of electrodes and insulator.

The standard spark plugs equipped in the original engine are D-8ES (NGK) or X24ES (Nihon denso).

1. If the plug is carboned up, sooty or has a hard deposit from the chemical fuel additives, it should be cleaned with a spark plug cleaner or a wire brush
2. Replace the plug if it insulator is cracked or chipped.
3. Check the gap between the electrodes with a thickness gauge and if necessary, adjust the ground electrode by bending, The standard clearance is 0.6-0.7 mm (0.025-0.028). 
4. Check the plug gasket before installation and replace if it dameged.