Removing

Removing valve tappets of cylinder bank 4 - 6








1. Remove fixing pin. Move camshafts of cylinder bank 4 - 6 to basic position. Turn crankshaft clockwise until the bore 1 OT (top dead center) in the belt pulley is aligned with the fixing bore on the crankcase. Position or fix with fixing pin (short) of special tool 9595 or 9595/1.
2. Pull off closure cap of camshaft bore using a shop-made tool.





3. Check basic camshaft position of cylinder bank 4 -6 The groove in the camshaft must face inward toward the crankcase.
View from the belt pulley side
4. Remove ignition coils and spark plugs.
5. Pull off oil protection tubes.
6. Pull off closure caps (2 ea.) of cylinder head 4 - 6 - flywheel side.





7. Undo ground strap of engine (cylinder head, near cylinder 6).
8. Fit special tool, holding-down device 9634, on the cylinder head.





Note: For reasons of space, the position of the holding-down device must be changed. To do so, remove original bolts and replace by bolts from special tool 9634/5.

9. Perform remaining assembly work on cylinder bank 4 - 6 as described in Item 10 - 19.








10. Relieve chain of tension. Unscrew chain tensioner from cylinder bank 4 - 6.
11. Take off drive plate of oil extraction pump. Remove sprocket wheel and chain and connect with a tie wrap (installation position).
12. Detach bearing saddles and lever out of the guide sleeves by hand. Do not use a tool.





13. Remove special tools (holding-down devices 9611 and 9634) and carefully lift the entire unit, consisting of camshafts with chain and tensioning element, out of the cylinder head. The chain must not jump over during this operation; reallocate if necessary. The groove or tab of the camshaft position sensor cover must face downward.
14. Pull out valve tappets by hand.

Note: Do not use a magnet.

Detach guide for valve tappet. Undo the pan-head screws (15 ea.) from the outside to the inside, and remove the guide.