Crankshaft Front Oil Seal Replacement

Special Tools

• EN-955-A  V-Belt and Timing Tensioner Locking Pin
• EN-45059-A  Angle Meter
• EN-52455  Open End Wrench
• EN-52457  Camshaft Locking Tool
• EN-52458  VCP Locking Tool
• EN-52476  Flywheel Locking Tool

Equivalent regional tools: Special Tools 

Removal Procedure

NOTE:
DO NOT remove the positive crankcase ventilation vacuum hose unless replacement of the hose is necessary.
• The positive crankcase ventilation vacuum hose clamps are tamper-proof connections.
• The turbocharger must be removed in order to install the positive crankcase ventilation vacuum hose at the turbocharger.
• The camshaft cover, turbocharger, and vacuum hose can be removed together as an assembly and set aside so long as the tamper-proof connection remains intact.
• The camshaft cover or turbocharger can be removed and set aside so long as the vacuum hose connection remains intact and undamaged.
1. Camshaft Cover - Position aside - Camshaft Cover Replacement 
2. Camshaft Position Actuator Solenoid Valve - Intake - Remove - Camshaft Position Actuator Solenoid Valve Replacement - Intake
3. Camshaft Position Actuator Solenoid Valve - Exhaust - Remove - Camshaft Position Actuator Solenoid Valve Replacement - Exhaust
4. Starter - Remove - Starter Replacement (LIH)
5. Timing Belt Lower Cover - Remove - Timing Belt Lower Cover Replacement 

6. Courtesy of GENERAL MOTORS COMPANY

   NOTE:

   Ensure the EN-52476  Flywheel Locking Tool (1) is properly assembled, and the timing pin plunger (3) is retracted. When using the EN-52476  Flywheel Locking Tool as an timing device, adjust the pawl armature (4) so the pawl is not engaging the teeth once installed.

   EN-52476  Flywheel Locking Tool (1) - Install

7. Bolt (2) - Install and tighten [2x]

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   Crankshaft Balancer Bolt (1) - Install

NOTE:

The engine timing is located 118.14 degrees after top dead center.

9. Adjust the engine to the engine timing position. Set the crankshaft in direction of engine rotation until the pin (2) of the EN-52476  Flywheel Locking Tool snaps automatically into the hole of the automatic transmission flex plate (3) or the engine flywheel.

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    If the engine timing is adjusted correctly, the valves (1, 3) of the 3rd cylinder must be closed. Also the 2 flats (2) must stand in vertical position.

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    NOTE:

    The EN-52457  Camshaft Locking Tool has an identification for which side it must be used. Place the EN-52457  Camshaft Locking Tool with the identification mark I (1) facing upwards. Also the surface has an identification for the intake (2).

    EN-52457-2  Locking Tool - Intake (5) - Install

12. Bolt (3, 4) - Install and tighten

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    NOTE:

    The EN-52457  Camshaft Locking Tool has an identification for which side it must be used. Place the EN-52457  Camshaft Locking Tool with the identification mark I (1) facing upwards. Also the surface has an identification for the exhaust (2).

    EN-52457-2  Locking Tool - Exhaust (5) - Install

14. Bolt (3, 4) - Install and tighten [2x]

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    Bolt @ EN-52458  VCP Locking Tool (2) - Loosen

16. EN-52458  VCP Locking Tool (1) - Adjust
17. EN-52458  VCP Locking Tool (1) - Install
CAUTION:

Fastener Caution

18. Bolt (3) - Install and tighten [4x] 6 N.m (53 lb in)
19. Bolt (2) - Tighten

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    Loosen the timing belt tensioner bolt (2) and release the tension from the timing belt tensioner (1). Rotate the timing belt tensioner counter-clockwise.

21. EN-955-10-A  locking pin (3) - Install

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    Install the EN-52458-3  locking tool (2) to the holes in the camshaft sprocket.

23. Check that the EN-52458-3  locking tool (2) sits correctly in the hole of the camshaft sprocket.
24. Bolt (3, 4) - Tighten [2x] 20 N.m (15 lb ft)
25. Camshaft Sprocket Actuator Valve Bolt (1) - Loosen [2x]
26. Bolt (3, 4) - Loosen [2x]

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    Bolt (3) - Remove [4x]

28. EN-52458  locking tool (1) - Remove

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    Camshaft Sprocket Actuator Valve Bolt (1) - Remove and DISCARD [2x]

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    Camshaft Sprocket (1) - Remove [2x]

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    Timing Belt Tensioner Bolt (2) - Remove

32. Timing Belt Tensioner (1) - Remove
33. Timing Belt Idler Pulley Bolt (3) - Loosen
34. Timing Belt Idler Pulley (4) - Remove

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    Crankshaft Balancer Bolt (4) - Remove

36. Crankshaft Sprocket (3) - Remove
37. Crankshaft Front Oil Seal (2) - Remove and DISCARD
38. Remove the timing belt (1) upwards.

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    Balancer Shaft Drive Gear (1) - Remove

40. Crankshaft Front Oil Seal (2) - Remove and DISCARD

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    Bolt (3, 4) - Remove [2x]

42. EN-52457-2  Locking Tool - Exhaust (5) - Remove

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    Bolt (3, 4) - Remove

44. EN-52457-2  Locking Tool - Intake (5) - Remove

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    Bolt (2) - Remove [2x]

46. EN-52476  Flywheel Locking Tool (1) - Remove

Installation Procedure

1. Courtesy of GENERAL MOTORS COMPANY

   NOTE:

   Ensure the EN-52476  Flywheel Lock Tool (1) is properly assembled, and the timing pin plunger (3) is retracted. When using the EN-52476  Flywheel Lock Tool as an timing device, adjust the pawl armature (4) so the pawl is not engaging the teeth once installed.

   EN-52476  Flywheel Lock Tool (1) - Install

2. Bolt (2) - Install and tighten [2x]

3. Courtesy of GENERAL MOTORS COMPANY

   Crankshaft Balancer Bolt (1) - Install

NOTE:

The engine timing is located 118.14 degrees after top dead center.

4. Engage the EN-52476  Flywheel Lock Tool timing pin plunger (2).
NOTE:

Once there is resistance, do NOT turn the crankshaft further.

5. Adjust the engine to the engine timing position. Use the crankshaft balancer bolt to slowly rotate the crankshaft in direction of engine rotation until the pin (3) of the EN-52476  Flywheel Lock Tool snaps automatically into the hole (4) of the automatic transmission flex plate or the engine flywheel.
6. Adjust the pawl armature (5) on the EN-52476  Flywheel Lock Tool so the pawl is not engaging the teeth.

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   Adjust the intake camshaft so that the valves (3) of the 3rd cylinder are closed and the 2 flats (2) stand in vertical position. Use the EN-52455  Open End Wrench (1).

8. Courtesy of GENERAL MOTORS COMPANY

   NOTE:

   The EN-52457  Camshaft Locking Tool has an identification for which side of the tool must be facing upward. Place the EN-52457  Camshaft Locking Tool with the I (1) facing upwards. The surface of the tool will also have the identification intake (2) for use on the intake camshaft.

   EN-52457-2  locking tool (5) @ Intake Camshaft - Install

9. Bolt (3, 4) - Install and tighten

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    Adjust the exhaust camshaft so that the valves (3) of the 3rd cylinder are closed and the 2 flats (2) stand in vertical position. Use the EN-52455  Open End Wrench (1)

11. Courtesy of GENERAL MOTORS COMPANY

    NOTE:

    The EN-52457  Camshaft Locking Tool has an identification for which side of the tool must be facing upward. Place the EN-52457  Camshaft Locking Tool with the I (1) facing upwards. The surface of the tool will also have the identification exhaust (2) for use on the exhaust camshaft.

    EN-52457-1  locking tool (5) @ Exhaust Camshaft - Install

12. Bolt (3, 4) - Install and tighten [2x]

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    Crankshaft Front Oil Seal (1) - Install NEW

NOTE:
• The alignment pin (3) on the balance shaft drive gear must be seated correctly in the depression (2) of the crankshaft.
• The depression (4) at the front of the balance shaft drive gear must stand at approximately 12 O'clock.
14. Balancer Shaft Drive Gear (5) - Install

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    The balance shaft is correctly adjusted if the alignment mark (1) on the balancer shaft driven gear stands between the two marks (2) on the balancer shaft drive gear.

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    Install the timing belt (1) downwards.

17. Crankshaft Front Oil Seal (2) - Install NEW
18. Crankshaft Sprocket (3) - Install
19. Crankshaft Balancer Bolt (4) - Install

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    NOTE:

    The front of the camshaft sprockets is recognizable by the pin (2).

    Camshaft Sprocket (1) - Install [2x]

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    Camshaft Sprocket Actuator Valve Bolt (1) - Install NEW and hand tighten [2x]

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    Timing Belt Tensioner (1) - Install

23. Timing Belt Tensioner Bolt (2) - Loosely install
24. Timing Belt Idler Pulley (4) - Install
CAUTION:

Fastener Caution

25. Timing Belt Idler Pulley Bolt (3) - Install and tighten 36 N.m (27 lb ft)

26. Courtesy of GENERAL MOTORS COMPANY

    EN-955-10-A  pin (2) - Remove

NOTE:

The nominal position of the timing belt tensioner is when the mobile index (5) is between the gap in the front plate (4).

27. Tension the timing belt tensioner (1) to the nominal position and an additional a = 10 degrees. Rotate the timing belt tensioner clockwise.
28. Timing Belt Tensioner Bolt (3) - Tighten 36 N.m (27 lb ft)

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    Bolt (2) - Loosen

30. Slide the EN-52458  VCP Locking Tool (1) apart.
31. EN-52458  VCP Locking Tool (1) - Install
32. Bolt (3) - Install and tighten [4x] 6 N.m (53 lb in)
33. Bolt (2) - Tighten

34. Courtesy of GENERAL MOTORS COMPANY

    Install the EN-52458-3  locking tool (2) to the holes in the intake camshaft sprocket.

35. Check that the EN-52458-3  locking tool (2) sits correctly in the hole of the camshaft sprocket.
NOTE:

A second technician is required.

36. Tighten the EN-52458-3  locking tool (2) to 20 N.m (15 lb ft). Rotate the EN-52458-3  locking tool clockwise.
37. While holding the EN-52458-3  locking tool to 20 N.m (15 lb ft), tighten the bolt (3) to 20 N.m (15 lb ft).
CAUTION:

Torque-to-Yield Fastener Warning

38. Camshaft Sprocket Actuator Valve Bolt (1) @ Intake Camshaft - Tighten
    1. First Pass: 50 N.m (37 lb ft)
    2. Final Pass: 28 degrees, use the EN-45059  meter

39. Courtesy of GENERAL MOTORS COMPANY

    Install the EN-52458-3  locking tool (3) to the holes in the exhaust camshaft sprocket.

40. Check that the EN-52458-3  locking tool (3) sits correctly in the hole of the camshaft sprocket.
NOTE:

A second technician is required.

41. Tighten the EN-52458-3  locking tool (3) to 20 N.m (15 lb ft). Rotate the EN-52458-3  locking tool clockwise.
42. While holding the EN-52458-3  locking tool to 20 N.m (15 lb ft), tighten the bolt (2) to 20 N.m (15 lb ft).
CAUTION:

Torque-to-Yield Fastener Warning

43. Camshaft Sprocket Actuator Valve Bolt (1) @ Exhaust Camshaft - Tighten
    1. First Pass: 50 N.m (37 lb ft)
    2. Final Pass: 28 degrees, use the EN-45059  meter

44. Courtesy of GENERAL MOTORS COMPANY

    Bolt (3) - Remove [4x]

45. EN-52458  locking tool (1) - Remove

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    Bolt (3, 4) - Remove [2x]

47. EN-52457-1  locking tool (5) - Remove

48. Courtesy of GENERAL MOTORS COMPANY

    Bolt (3, 4) - Remove

49. EN-52457-2  locking tool (5) - Remove

50. Courtesy of GENERAL MOTORS COMPANY

    Turn the crankshaft 720 degrees in the direction of engine rotation by the crankshaft balancer bolt (1) until the pin (2) of the EN-52476  lock tool snaps automatically into the hole (3) of the automatic transmission flex plate or the engine flywheel.

51. Courtesy of GENERAL MOTORS COMPANY

    NOTE:

    The nominal position of the timing belt tensioner is when the mobile index (2) sits in the middle between the gap of the front plate (3). A tolerance is given when half of the hole (4) is visible (+/- 5 degrees).

    Check that the timing belt tensioner (1) is in the nominal position.

52. If not, repeat the step to adjust the tensioner.

53. Courtesy of GENERAL MOTORS COMPANY

    NOTE:

    The EN-52457  Camshaft Locking Tool has an identification for which side of the tool must be facing upward. Place the EN-52457  Camshaft Locking Tool with the I (1) facing upwards. The surface of the tool will also have the identification intake (2) for use on the intake camshaft.

    EN-52457-2  locking tool (5) @ Intake Camshaft - Install

54. Courtesy of GENERAL MOTORS COMPANY

    NOTE:

    The EN-52457  Camshaft Locking Tool has an identification for which side of the tool must be facing upward. Place the EN-52457  Camshaft Locking Tool with the I (1) facing upwards. The surface of the tool will also have the identification exhaust (2) for use on the exhaust camshaft.

    EN-52457-2  locking tool (5) - Install

55. If the EN-52457  Camshaft Locking Tool can be installed, the engine timing is properly adjusted.
56. If the EN-52457  Camshaft Locking Tool can not be installed, repeat the steps to set the engine timing.
57. EN-52457  Camshaft Locking Tool - Remove

58. Courtesy of GENERAL MOTORS COMPANY

    Crankshaft Balancer Bolt (1) - Remove

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    Bolt (2) - Remove [2x]

60. EN-52476  Flywheel Locking Tool (1) - Remove
61. Timing Chain Lower Cover - Install - Timing Belt Lower Cover Replacement 
62. Starter - Install - Starter Replacement (LIH)
63. Camshaft Position Actuator Solenoid Valve - Exhaust - Install - Camshaft Position Actuator Solenoid Valve Replacement - Exhaust
64. Camshaft Position Actuator Solenoid Valve - Intake - Install - Camshaft Position Actuator Solenoid Valve Replacement - Intake
65. Camshaft Cover - Install - Camshaft Cover Replacement