1999 Volvo Penta "WT" Models Workshop Manual, Page 134Get this manual
Tighten: Bolts to 12 ftlb(16 Nm)
3Valve push rodsaSeat the valve push rods into the socket of the valve liftersbCoat the mating surfaces of the valve rocker arms and balls with GM Engine Oil Supplement, PiN 1052365, or equivalent
4Valve rocker arms with balls on to the proper stud5Valve rocker arm nuts onto the studs Align the valve push rod into the valve rocker arm while tightening valve rocker arm nut
No lash adjustment is neededThese models use screw-In rocker arm studs with positive stop shoulders
Important
Tighten: