J491730 Timing, Check (Y 17 DT, with AC, LHD)
1. Open bonnet
Caution!
On vehicles from model year 04 with ESP - the steering angle
sensor loses its basic adjustment each time the battery is
disconnected. It must be recalibrated.
2. Disconnect battery
3. Remove air cleaner housing (1)
- Remove wiring harness plug for hot film mass air flow meter
(3)
- Release in direction of arrow
- Remove air intake hose (4)
- Remove bolt (2)
4. Remove charge air hose
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5. Loosen centre charge air pipe
6. Loosen right front wheel
7. Raise vehicle
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8. Remove right front wheel
9. Raise vehicle
10. Remove centre charge air pipe
- Remove lower bolt (1)
- Loosen clamp (2)
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11. Detach ribbed V-belt cover
- Remove 3 bolts (1)
- Remove clip (arrow).
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12. Detach ribbed V-belt
- Tension ribbed V-belt tensioner in direction of arrow
- Using KM-913-A at fastening bolt (1)
- Note! Mark running direction
13. Detach upper toothed belt cover
14. Lower vehicle
15. Detach alternator wiring harness
- Disconnect wiring harness plug
- Unscrew nut
- Unclip wiring harness
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16. Remove wiring trough (1)
- Unclip vacuum lines (2)
- Unclip wiring trough
- Remove bolt (3)
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17. Remove upper toothed belt cover
- Remove 6 bolts
- Note! Note dissimilar bolt lengths
- Pull upper toothed belt cover out of guide bushing of lower
toothed belt cover and remove carefully
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18. Check 1st cylinder TDC
- Turn crankshaft evenly until TDC-fixing bolts can be
inserted
- Camshaft pulley (M6)
- Injection pump drive gear (M8) (4)
- Note! Mark (2) on torsional vibration damper (1) must align
with pin (3) on oil pump cover
- Caution! Timing must be adjusted if TDC fixing bolts cannot be
inserted! – see operation "Timing, Adjust"
- Remove TDC fixing bolts
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19. Install upper toothed belt cover
- Note! When installing toothed belt cover, pull lower corner
forwards
- Ensure correct seating of guide bushing
- Tighten 6 bolts (9.8 Nm / 7.2 lbf. ft.)
20. Attach alternator wiring harness
- Attach wiring trough
- Clip-in wiring trough
- Tighten bolt
- Clip in vacuum hoses
- Caution! Ensure correct vacuum hose connection
- Attach wiring plug
- Screw in nut
21. Raise vehicle
22. Fasten upper toothed belt cover
- Tighten 2 lower bolts (9.8 Nm / 7.2 lbf. ft.)
23. Install ribbed V-belt
- Note! Observe running direction and installation position
- Release ribbed V-belt tensioner
24. Attach ribbed V-belt cover
- Screw in bolts
- Install clip
25. Install centre charge air pipe
- Insert in lower charge air pipe
- Tighten lower bolt
26. Lower vehicle
27. Attach right front wheel
28. Lower vehicle
29. Fasten right front wheel
- Tighten bolts (110 Nm / 81 lbf. ft.)
30. Fasten centre charge air pipe
31. Install air hose
- Tighten clamps (3.5 Nm / 2.5 lbf. ft.)
32. Install air cleaner housing
- Tighten bolt
- Fasten air intake hose.
- Tighten clamp (3.5 Nm / 2.6 lbf. ft.)
- Connect wiring harness plug to hot film mass air flow
meter
33. Connect battery
34. Calibrate steering angle sensor
Note: Rotate the
steering wheel one time from its right-hand to its left-hand
stop.
35. Program volatile memories
35. Close bonnet
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