Sonata GL V6-2.5L (1999)
4. Check the spark plug gap using a wire gap gauge, and adjust if necessary.
Standard value:
Spark plug gap 1.0-1.1 mm (0.039-0.043 in.)
5. Re-insert the spark plug and tighten to the specified torque. If it is overtorqued, damaged to the threaded portion of cylinder head may result.
Tightening torque
Spark plug 20-30 Nm (204-306 kg.cm, 15-21 lb.ft)
NOTE: When replacing the spark plug, should use the genuine parts having resistance.
