To fit

Apply Molykote 1000 (part no. 30 20 971) or equivalent to the spark plug threads.
Apply Krytox (part no. 30 19 312) to the rubber seals.
Fit the spark plugs and check the gaps. See SPARK PLUGS .
Tightening torque 28 N.m (21 lbf ft)

Fig 1: Identifying Spark Plug Gap
Courtesy of SAAB-SCANIA OF AMERICA, INC.
Fit the 4 ignition discharge module screws.

Fig 2: Illustration For Step 4-5
Courtesy of SAAB-SCANIA OF AMERICA, INC.

Tightening torque 11 N.m (8.1 lbf ft)
Plug in the 10-pin ignition discharge module connector.