To fit

Fig 1: Identifying Spark Plug Gap

Courtesy of SAAB-SCANIA OF AMERICA, INC.

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.
Tightening torque 28 N.m (21 lbf ft)
Fit the 4 ignition discharge module screws.

Fig 2: Illustration For Steps 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.