Timing chain replacement: Polo4 1.2 6V (AWY/BMD/BBM) Chain — VW

🧭 Before you start

Fits: platform codes 1.2, 6V

• Opens: engine oil
• Timing position: the crankshaft or camshaft is set and locked during this job
• Special tools named: locking pin, locking tool

Don't miss

• Before removing, mark the direction of rotation
• Use the special tool to counterhold

🔧 Engine codes this applies to

📋 Procedure

Preparation and removal

1. Camshaft locking pin:
2. Counterhold tool:
3. Crankshaft locking tool:
4. Engine support tool:
5. Turn the tensioner clockwise to release the belt tension

6. Note: Avoid bending, torsion or traction
7. Remove the ancillary drive belt
8. Note: Before removing, mark the direction of rotation
9. Remove the Hall sensor
10. Turn the crankshaft until the locking pin fits
11. Use the special tool to counterhold
12. Disconnect the engine speed sensor
13. Lock the crankshaft by fitting a locking pin into the flywheel
14. Stage 1:
15. Stage 2:
16. Stage 1:
17. Stage 2:
18. Support the engine
19. Remove the locking pin from the chain tensioner
20. Drain the engine oil
21. Remove the oil sump
22. Proceed as follows:
23. Oil pump gearwheel
24. Remove the crankshaft pulley
25. Remove the timing chain cover
26. Remove the tensioner spring
27. Remove the tensioner upper bolt
28. Remove the flywheel locking tool
29. Remove the chain with crankshaft gearwheel

Installation and checks

30. Fit the crankshaft pulley bolt
31. Lock the tensioner; use a locking pin
32. Turn the crankshaft until the camshaft locking tool can be fitted
33. Fit the camshaft locking pin
34. Loosen the camshaft gearwheel
35. Use the special tool to counterhold
36. Turn the crankshaft until the locking pin fits
37. Lock the crankshaft by fitting a locking pin into the flywheel
38. Tighten the camshaft gearwheels
39. Remove the camshaft gearwheel bolt
40. Use the special tool to counterhold
41. Use the special tool to counterhold
42. Remove the chain tensioner rail(s)
43. Remove the guide rail(s)
44. Check the timing again
45. Remove the crankshaft pulley centre bolt
46. Fit the camshaft locking pin
47. Fit the flywheel locking tool
48. Refit the timing chain cover
49. Note: Apply sealant before fitting
50. Refit the crankshaft pulley
51. Renew the bolt(s)
52. Tighten the crankshaft pulley centre bolt
53. Use the special tool to counterhold
54. Remove all the locking tools
55. Refit the oil sump
56. Refit the engine mount
57. Remove the engine support tool
58. Refit the alternator
59. Refit the air-conditioning compressor
60. Refit the Hall sensor(s)
61. Reconnect the engine speed sensor
62. Refit the ancillary drive belt
63. Remove the tensioner locking tool
64. Refit the engine upper cover
65. Refit the air filter
66. Refill the engine oil
67. Reconnect the battery

Other VW procedures

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• Adjusting valve timing, engine codes AWY, BMD, BBM · 1 torque figures
• Removing and installing timing chain and drive chain for oil pump, engine codes AWY, BMD, BBM
• Removing and installing anti-theft-secured engine control unit J623 (►model year 2007)
• Bleeding fuel system
• Removing engine · 41 torque figures
• Removing and installing camshaft · 47 torque figures
• Adjusting valve timing · 83 torque figures
• Removing and installing camshafts · 39 torque figures
• Removing and installing coolant pump · 53 torque figures