Camshaft Timing Chain Adjustment
Special Tools
• |
EN-49977-100
Fixation Sensor Discs |
For equivalent regional tools, refer to
Special Tools .
6. |
Rotate the engine clockwise
until the bore (2) in the crankshaft balancer aligns with the mark
(1) on the engine front cover. |
7. |
Remove the crankshaft bearing
cap tie plate hole plug (2) and the seal ring (1). |
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Caution: To
ensure proper crankshaft top dead center (TDC) alignment, the
retention pin should fit easily through the bore in the crankshaft
tie plate and into the crankshaft. Binding of the retention pin
could affect proper engine timing. |
8. |
Install the EN-952
fixing pin (1) to hold the crankshaft in TDC
position. |
9. |
Loosen the intake camshaft
sprocket bolt (2) while holding the hexagon of the intake camshaft
with a wrench (1) until the camshaft position exciter wheel is
clearly rotatable. |
10. |
Loosen the exhaust camshaft
sprocket bolt while holding the hexagon of the exhaust camshaft
with a wrench until the camshaft position exciter wheel is clearly
rotatable. |
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Note: The fixing tool
should be installed completely to both camshaft grooves without
high effort.
|
11. |
Adjust the camshafts so that
the EN-953-A fixing tool (1) can be
installed. |
12. |
Remove the 2 upper timing
chain guide bolts (1). |
13. |
Remove the upper timing chain
guide (2). |
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Note: Push the fixing
tool in the direction of the arrow to ensure it engages without
clearance.
|
14. |
Install the
EN-49977-200 fixing tool (2) and adjust the gearing
of the fixing tool so it engages with the intake camshaft sprocket
gearing (1). |
15. |
Tighten the 2 fastening bolts
(1) of the EN-49977-200 fixing tool while pushing
the fixing tool in direction of the arrow. |
16. |
Tighten the adjuster bolt
(2). |
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Note: A wrong
installation position is possible. Make sure that the fixation tool
is installed without clearance to the cylinder head in areas (3)
and (5).
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17. |
Install the
EN-49977-100 fixation (2) to find and hold the
camshaft position exciter wheels in the correct position.
|
18. |
Tighten the 2 fastening bolts
(6) of the EN-49977-100 fixation . |
19. |
Tighten the intake camshaft
sprocket bolt (4) while holding the hexagon (1) of the intake
camshaft to 50 N·m (37 lb ft) .
|
20. |
Tighten the intake camshaft
sprocket bolt (4) while holding the hexagon (1) of the intake
camshaft an additional 60° . |
21. |
Tighten the exhaust camshaft
sprocket bolt while holding the hexagon of the exhaust camshaft to
50 N·m (37 lb ft) . |
22. |
Tighten the exhaust camshaft
sprocket bolt while holding the hexagon of the exhaust camshaft an
additional 60° . |
23. |
Remove the
EN-49977-100 fixation and the EN-49977-200
fixing tool . |
24. |
Install the upper timing chain
guide (2). |
25. |
Install the 2 upper timing
chain guide bolts (1) and tighten to 8 N·m (71 lb
in) . |
26. |
Remove the EN-953-A
fixing tool . |
27. |
Remove the EN-952
fixing pin . |
28. |
Rotate the crankshaft for
720° and check the engine timing again. Repeat
the adjustment procedure if necessary. |
29. |
Install the crankshaft bearing
cap tie plate hole plug and seal ring and tighten to 40
N·m (30 lb ft) . |
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