Spark Plug: Service and Repair

Spark Plug Replacement

Removal Procedure

1. Remove the spark plug wires.






2. Loosen each spark plug 1 or 2 turns.
3. Brush or air blast away any dirt from around the spark plugs.
4. Remove the spark plugs 1 at a time. Place each plug in a tray marked with the corresponding cylinder numbers.

Installation Procedure






1. Inspect each spark plug gap. Adjust each plug as needed.

Specification
Spark plug gap: 1.01 mm (0.040 inch)

2. Hand start the spark plugs in the corresponding cylinders.

Notice:

3. Tighten the spark plugs.

Tighten
- For used heads tighten the spark plugs to 15 Nm (11 lb ft).
- For new aluminum heads tighten the spark plugs to 20 Nm (15 lb ft).
- For new iron heads, tighten the spark plugs to 30 Nm (22 lb ft).

4. Install the spark plug wires.