Tightening Specifications

Cylinder Head Torque Sequence





Cylinder bank 1
^ Tighten cylinder head in tightening sequence as follows:

Note: The longer cylinder head bolts must be inserted in the middle holes of cylinder head.

^ Pretighten all bolts to 30 Nm.
^ Then tighten all bolts to 50 Nm.
^ Then tighten all bolts 1/4 turn (90°) further using a rigid wrench.
^ Then tighten all bolts again 1/4 turn (90°) further.





Cylinder bank 2
^ Tighten cylinder head in tightening sequence as follows:

Note: The longer cylinder head bolts must be inserted in the middle holes of cylinder head.

^ Pretighten all bolts to 30 Nm.
^ Then tighten all bolts to 50 Nm.
^ Then tighten all bolts 1/4 turn (90°) further using a rigid wrench.
^ Then tighten all bolts again 1/4 turn (90°) further.

Camshaft Bearing Cap Torque





Cylinder bank 1
^ Before installing coat facing contact surfaces of bearing caps 7 and 8 lightly with grease G 052 723 A2.
^ Oil running surfaces of both camshafts.
^ Place respective camshaft carefully in camshaft bearings of cylinder head, observing camshaft identification.

Note: Observe installation position of bearing caps:





^ Points of bearing caps -A- of intake and exhaust camshafts face outward.
^ Identification on bearing caps is legible when read from the intake side.





A - Intake camshaft
^ Tighten bearing caps 3 and 7 alternately and diagonally to 5 Nm and 1/8 turn (45°) further.
^ Install bearing cap 5 and tighten to 5 Nm and 1/4 turn (45°) further.
^ Install bearing caps 1 and 9 and tighten to 5 Nm and 1/4 turn (45°) further.





B - Exhaust camshaft
^ Tighten bearing caps 4 and 8 alternately and diagonally to 5 Nm and 1/4 turn (45°) further.
^ Install bearing cap 6 and tighten to 5 Nm and 1/4 turn (45°) further.
^ Install bearing caps 2 and 10 and tighten to 5 Nm and 1/4 turn (45°) further.





Cylinder bank 2
^ Before installing coat facing contact surfaces of bearings 27 and 28 with grease G 052 723 A2.
^ Oil running surfaces of both camshafts.
^ Place respective camshaft carefully in camshaft bearings of cylinder head, observing camshaft identification, Refer to Intake/Exhaust Valve, Service and Repair, Valve Gear Servicing, See Fig 7.





Note: Observe installation position of bearing caps:

^ Points of bearing caps -A- of intake and exhaust camshafts face outward.
^ Identification on bearing caps is legible when read from the intake side.





A - Intake camshaft
^ Tighten bearing caps 23 and 27 alternately and diagonally to 5 Nm and 1/8 turn (45°) further.
^ Install bearing cap 25 and tighten to 5 Nm and 1/4 turn (45°) further.
^ Install bearing caps 21 and 29 and tighten to 5 Nm and 1/4 turn (45°) further.





B - Exhaust camshaft
^ Tighten bearing caps 24 and 28 alternately and diagonally to 5 Nm and 1/4 turn (45°) further.
^ Install bearing cap 26 and tighten to 5 Nm and 1/4 turn (45°) further.
^ Install bearing caps 22 and 30 and tighten to 5 Nm and 1/4 turn (45°) further.





Tightening Torque

Sump bolts 8 Nm
Oil pump bolts 20 Nm
Chain tensioner 40 Nm
Drive plate 60 Nm + 1/4 turn (90°)
(Turning further may be performed in several steps.)