Install new spark plugs

Fig 1: Identifying Spark Plug

Courtesy of VOLVO CARS OF NORTH AMERICA.

Check the spark plug gap.
NOTE: Turbocharged engines: Correct spark gap: 0.7 - 0.8 mm (0.02-0.03 in).
Lubricate the spark plug threads with paste.
P/N: 116 1408.

Tighten to 30 Nm (22 lb. ft) .