Camshaft: Testing and Inspection

Tools

Checking camshafts

Note: The description enables rapid trouble-shooting of the camshaft drive. The original chain tensioner (3 ea.) does not have to be removed.

Preliminary work
1. Disconnect battery.
2. Remove air cleaner assembly.





2.1. Undo collar screw M6 x 34.





2.2. Detach oil filler neck. Undo hose clamp on throttle body and pull plug off the hot film mass air flow meter. Unclip wire on air cleaner housing and remove air cleaner assembly.
3. Remove right rear wheel.





4. Pull off caps of camshaft bores (6 ea.) using the shop-made tool.




Drawing shows closure cap on cylinder head 1 - 3 (flywheel side)





5. Undo ground strap between engine and body. Undo the strap at the engine (cylinder head, near cylinder 6).

Checking camshafts of cylinder bank 1 - 3








1. Move camshafts of cylinder bank 1 - 3 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. Check basic camshaft adjustment of cylinder bank 1 -3 . Ensure that the groove in the camshaft faces outward toward the cylinder head cover.
View from the f~wheel side
If the position of the camshafts is incorrect or the groove in the inlet camshaft does not face outward, remove fixing pin of belt pulley and turn crankshaft a further 360° clockwise. Then position or fix the fixing pin in the bore (1 OT) and the fixing bore in the crankcase again.
3. Check the position of the groove again.




View from the belt pulley side. Rear muffler removed for clearer illustration.

4. If the allocation is correct, at the same time, the narrow segment of the exhaust camshaft on the opposite side must face the cylinder head cover.






5. Position special tool, adjustment device 9612/9, on the cylinder head and fasten with a hexagon-head bolt M8 x 30.

Note: Do not use force when positioning the special tool. It should be possible to fit the special tool and hexagon-head bolt with ease.

Checking camshafts 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.




View from the belt pulley side

2. Check basic camshaft position of cylinder bank 4 -6 . The groove in the camshaft must face inward toward the crankcase.





View from the flywheel side

3. If the allocation is correct, at the same time, the narrow segment of the exhaust camshaft on the opposite side must face the cylinder head cover.









4. Position special tool, adjustment device 9612/9, on the cylinder head and fasten with a hexagon-head bolt M8 x 30.

Note: If the special tool cannot be inserted in the cylinder head for reasons of space, proceed as follows: Insert a suitable piece of wood between the cylinder head and the side member as a support. Press the piece of wood forward and simultaneously insert the special tool. Do not use force when positioning the special tool. It should be possible to fit the special tool and hexagon-head bolt with ease.