To the top of the document
Spark
   
GMDE Start Page Load static TOC Load dynamic TOC Help?

Camshaft Timing Chain Adjustment

Special Tools

    • EN-470-B Torque Angle Sensor
    • EN-662-C Holding Spanner
    • EN-956-1 Extension
    • EN-46785 Fixing Tool Crankshaft, if the Transmission is installed
    • EN-50514 Holder Camshaft
    • EN-50515 Fixing Tools Camshaft
    • EN-50516 Fixing Tool Crankshaft, if the Transmission is removed
    • EN-50519 Fixing Tool Balance Shaft

For equivalent regional tools, refer to Special Tools

Removal Procedure

  1. Remove the following attachment parts if still installed at the engine:
  2. 1.1. Remove the generator. Refer to Generator Removal .
    1.2. Remove the exhaust gas recirculation valve vacuum tank . Refer to Exhaust Gas Recirculation Valve Vacuum Tank Removal .
    1.3. Remove the alternator bracket . Refer to Alternator Bracket Removal .
    1.4. Remove the exhaust gas recirculation pipe. Refer to Exhaust Gas Recirculation Pipe Removal .
    1.5. Remove the exhaust gas recirculation valve cooler. Refer to Exhaust Gas Recirculation Valve Cooler Removal .
    1.6. Remove the intake manifold. Refer to Inlet Manifold Removal .
    1.7. Remove the diesel fuel separator. Refer to Diesel Fuel Separator Removal .
    1.8. Remove the vacuum pump . Refer to Vacuum Pump Removal .
    1.9. Remove the fuel injection fuel feed pipe from fuel injection pump to fuel rail. Refer to Fuel Injection Fuel Feed Pipe Removal - Fuel Injection Pump to Fuel Rail .
    1.10. Remove the fuel injection pump. Refer to Fuel Injection Pump Removal .
    1.11. Remove the fuel injection fuel feed pipe from fuel rail to fuel injectors. Refer to Fuel Injection Fuel Feed Pipe Removal - Fuel Rail to Fuel Injector .
    1.12. Remove the fuel rail. Refer to Fuel Rail Removal .
    1.13. Remove the sump. Refer to Sump Removal .

    2549997
  3. Remove the camshaft cover core hole plug - intake (1) from the camshaft housing (2).
  4. Remove the camshaft cover core hole plug - exhaust (3) from the camshaft housing (2).
  5. Clean the threads from the camshaft cover core hole plugs and the camshaft housing.

  6. 2547226
  7. Remove the 4 positive crankcase ventilation cover bolts (3).
  8. Remove the positive crankcase ventilation cover (1).
  9. Remove the positive crankcase ventilation cover gasket (2).

Adjustment Procedure


    2547252
  1. Install the 2EN-50515 fixing tools  (1) on exhaust and intake side.

  2. 2547254

    Note: Engage the EN-50515 fixing tool at the intake camshaft

  3. Apply pressure at EN-50515 fixing tool  (arrow) and carefully turn the crankshaft at the crankshaft sprocket bolt (2) in the direction of engine rotation (arrow), until EN-50515 fixing tool  (1) engages in the intake camshaft.

  4. 2190969
  5. Install EN-662-C holding wrench  (2) to counterhold the crankshaft.
  6. Install 2 bolts.
  7. Loosen the crankshaft sprocket bolt (1)
  8. Note: Counterhold at the camshaft sprocket. Second person required.


    2547263

    Note: The holding pins from the EN-50514 holder  (1) must be installed exactly in the holes (arrows) from the camshaft sprocket (2).

  9. Install EN-50514 holder  (1) with the EN-956-1 extension to counterhold the camshaft sprocket (2).

  10. 2192182
  11. Loosen the camshaft intake sprocket bolt (1).
  12. Rotate the exhaust camshaft 15° against the direction of engine rotation.
  13. Turn the exhaust camshaft at the camshaft sprocket bolt in direction of the engine rotation until the EN-50515 fixing tool engages in the exhaust camshaft.
  14. Remove and DISCARD the camshaft intake sprocket bolt (1).
  15. Install the NEW camshaft intake sprocket bolt (1).
  16. Caution: Refer to Fastener Caution in the Preface section.

    Caution: Refer to Torque-to-Yield Fastener Caution in the Preface section.

    Note: Counterhold the camshaft sprocket withEN-50514 holder .

  17. Tighten the NEW camshaft intake sprocket bolt (1) to 100 N·m +45° (74 lb ft +45°).

  18. 2190969
  19. Counterhold crankshaft with EN-662-C holding wrench  (2).
  20. Tighten the crankshaft sprocket bolt (1) to 50 N·m +90° (37 lb ft +90°).

  21. 2547263

    Note: The holding pins from the EN-50514 holder  (1) must be installed exactly in the holes (arrows) from the camshaft sprocket (2).

  22. Install EN-50514 holder  (1) with the EN-956-1 extension to counterhold the camshaft sprocket (2).
  23. Note: Do not remove the camshaft sprocket bolt (3).

  24. Loosen the camshaft sprocket bolt (3).
  25. Remove the EN-50514 holder (1).

  26. 2191979

    Note: If the transmission is installed.

  27. Carefully turn the crankshaft until the EN-46785 fixing tool  (1) engages in the flywheel.

  28. 2190953

    Note: If the transmission is removed.

  29. Carefully turn the crankshaft until the EN-50516 fixing tool  (1) engages in the flywheel and the engine block.

  30. 2547263
  31. Remove and DISCARD the camshaft sprocket bolt (3).
  32. Install the NEW camshaft sprocket bolt (3).
  33. Note: The holding pins from the EN-50514 holder  (1) must be installed exactly in the holes (arrows) from the camshaft sprocket (2).

  34. Install EN-50514 holder  (1) with the EN-956-1 extension to counterhold the camshaft sprocket (2).
  35. Caution: Refer to Torque-to-Yield Fastener Caution in the Preface section.

  36. Tighten the NEW camshaft sprocket bolt (3) to 100 N·m +45° (74 lb ft +45°).
  37. Remove the EN-50514 holder (1).

  38. 2190969
  39. Loosen the crankshaft sprocket bolt (1).

  40. 2547305
  41. Install EN-50519 fixing tool  (2) to balance shaft driven gear (1).

  42. 2190969
  43. Counterhold crankshaft with EN-662-C holding wrench  (2).
  44. Remove and DISCARD the crankshaft sprocket bolt (1).
  45. Install the NEW crankshaft sprocket bolt (1).
  46. Caution: Refer to Fastener Caution in the Preface section.

    Caution: Refer to Torque-to-Yield Fastener Caution in the Preface section.

  47. Tighten the NEW crankshaft sprocket bolt (1) to 50 N·m +90° (37 lb ft +90°).

  48. 2547305
  49. Remove the EN-50519 fixing tool  (2) from the balance shaft driven gear (1).

  50. 2547252
  51. Remove the 2 EN-50515 fixing tools  (1).

  52. 2191979

    Note: If the transmission is installed.

  53. Remove the EN-46785 fixing tool (1).

  54. 2191897

    Note: If the transmission is removed.

  55. Remove the EN-50516 fixing tool  (1).
  56. Inspect the camshaft timing chain. Refer to Camshaft Timing Chain Inspection .

Installation Procedure


    2547226
  1. Install the positive crankcase ventilation cover gasket (2).
  2. Install the positive crankcase ventilation cover (1).
  3. Caution: Refer to Torque-to-Yield Fastener Caution in the Preface section.

  4. Install the 4 positive crankcase ventilation cover bolts (3) and tighten in a cross sequence to 10 N·m (89 lb in).

  5. 2549997
  6. Clean the threads from cylinder head core hole plug and camshaft housing.
  7. Install the cylinder head core hole plug exhaust side (3) to the camshaft housing (2) and tighten to 25 N·m (18 lb ft).
  8. Install the cylinder head core hole plug intake side (1) to the camshaft housing (2) and tighten to 25 N·m (18 lb ft).
  9. Install the following attachments parts if still removed from the engine:
  10. 7.1. Install the oil pan. Refer to Sump Installation .
    7.2. Install the fuel rail. Refer to Fuel Rail Installation .
    7.3. Install the fuel injection fuel feed pipe from fuel rail to fuel injectors. Refer to Fuel Injection Fuel Feed Pipe Installation - Fuel Rail to Fuel Injector .
    7.4. Install the fuel injection pump. Refer to Fuel Injection Pump Installation .
    7.5. Install the fuel injection fuel feed pipe from fuel injection pump to fuel rail. Refer to Fuel Injection Fuel Feed Pipe Installation - Fuel Injection Pump to Fuel Rail .
    7.6. Install the vacuum pump . Refer to Vacuum Pump Installation .
    7.7. Install the diesel fuel separator. Refer to Diesel Fuel Separator Installation .
    7.8. Install the inlet manifold. Refer to Inlet Manifold Installation .
    7.9. Install the exhaust gas recirculation valve cooler. Refer to Exhaust Gas Recirculation Valve Cooler Installation .
    7.10. Install the exhaust gas recirculation pipe. Refer to Exhaust Gas Recirculation Pipe Installation .
    7.11. Install the alternator bracket . Refer to Alternator Bracket Installation .
    7.12. Install the exhaust gas recirculation valve vacuum tank. Refer to Exhaust Gas Recirculation Valve Vacuum Tank Installation .
    7.13. Install the generator. Refer to Generator Installation .
   


© Copyright Chevrolet. All rights reserved