April 5, 2026: LEMON Manuals is launched! Read the announcement.

Spark Plug: Adjustment

Adjust the spark plug gap, if necessary, by measuring with a gap gauge.

Spark plug gap: L

1.0 - 1.1 mm (0.039 - 0.043 in)

Fig 1: Adjusting Spark Plug Gap

Courtesy of SAAB-SCANIA OF AMERICA, INC.

NOTE: Replace with a new spark plug if the area (A) is worn to spherical shape.