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Home >> Chevrolet >> 2013 >> Tahoe LS, RWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 17 (Engine Mechanical - Hybrid (LZ1) - Repair Instructions - On Vehicle) >> Repair Instructions - On Vehicle >> Camshaft Replacement >> Installation Procedure

Installation Procedure

WARNING: This page is about a different variant/trim than selected.
    Fig 1: View Of Camshaft
    GM1704626Courtesy of GENERAL MOTORS COMPANY
  1. Lubricate the camshaft journals and the bearings with clean engine oil.
  2. Install the camshaft sprocket bolt into the camshaft front bolt hole.
    3. CAUTION:

    All camshaft journals are the same diameter, so care must be used in removing or installing the camshaft to avoid damage to the camshaft bearings.

  3. Using the bolt as a handle, carefully install the camshaft into the engine block.
  4. Remove the bolt from the front of the camshaft.
    5. Fig 2: View Of Camshaft Retainer & Retainer Bolt
    GM1969013Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    The gasket surface on the engine block should be clean and free of dirt and/or debris.

  5. Install the camshaft retainer (203) and bolts (204). Install the retainer with the sealing gasket facing the engine block.
    6. Fig 3: View Of Camshaft Retainer & Bolt
    GM1967334Courtesy of GENERAL MOTORS COMPANY
  6. Tighten the camshaft retainer bolts.

    Tighten 

    • Tighten the first design hex head bolts (3) to 25 (18 lb ft).
    • Tighten the second design TORX® head bolts (4) to 15 (11 lb ft).
    7. Fig 4: View Of Compressed Tensioner
    GM1658249Courtesy of GENERAL MOTORS COMPANY
  7. Compress the timing chain tensioner guide and install the EN-46330  timing belt tensioner retaining pin.
    8. Fig 5: Identifying Alignment Hole & Locating Pin
    GM1658240Courtesy of GENERAL MOTORS COMPANY
    NOTE:
    • Properly locate the CMP actuator onto the locating pin of the camshaft.
    • The sprocket teeth and timing chain teeth must mesh.
    • The camshaft and the crankshaft sprocket alignment mark MUST be aligned properly.
    • Do not use the CMP solenoid valve again. Install a NEW valve during assembly.
  8. Identify the alignment hole (1) in the rear face of the CMP actuator and the locating pin (2) on the front face of the camshaft.
    9. Fig 6: View Of CMP Actuator & Timing Chain
    GM1670621Courtesy of GENERAL MOTORS COMPANY
  9. Align the CMP actuator so the timing mark is in the 6 o'clock position.
  10. Install the CMP actuator (235) and timing chain (208). Align the hole in the face of the CMP actuator with the locating pin on the front face of the camshaft.
    11. Fig 7: Inspecting For Proper Installation Of CMP Actuator & Timing Chain
    GM1670626Courtesy of GENERAL MOTORS COMPANY
  11. Place a straight edge across the front face of the engine block and inspect for proper installation of the CMP actuator and timing chain. With the CMP actuator properly and completely installed onto the front of the camshaft, the timing chain will not protrude beyond the front face of the engine block.
    12. Fig 8: View Of CMP Actuator Solenoid Valve
    GM1670622Courtesy of GENERAL MOTORS COMPANY
  12. Install a NEW CMP actuator solenoid valve (234). With the CMP actuator properly positioned onto the camshaft, the CMP actuator solenoid valve can be threaded completely into the camshaft using light hand pressure. Tighten by hand until snug.
    13. Fig 9: View Of CMP Actuator Alignment Mark & Crankshaft Sprocket Alignment Mark
    GM1670623Courtesy of GENERAL MOTORS COMPANY
  13. Inspect the sprockets for proper alignment. The mark on the CMP actuator sprocket (1) should be located in the 6 o'clock position and the mark on the crankshaft sprocket (2) should be located in the 12 o'clock position.
    14. Fig 10: Timing Belt Tensioner Retaining Pin
    GM1658253Courtesy of GENERAL MOTORS COMPANY
  14. Remove the EN-46330  timing belt tensioner retaining pin.
    15. Fig 11: Tightening The CMP Actuator Solenoid Valve
    GM1658245Courtesy of GENERAL MOTORS COMPANY
  15. Tighten the CMP actuator solenoid valve.

    Tighten 

    1. Tighten the valve a first pass to 65 (48 lb ft).
    2. Tighten the valve a final pass to 90 degrees using J-45059  angle meter.
    16. Fig 12: View Of Special Tool & Bolts
    GM1658136Courtesy of GENERAL MOTORS COMPANY
  16. Remove the J-42386-A  flywheel holding tool (1) and bolts.
  17. Install the engine front cover. Refer to Engine Front Cover Replacement .
  18. Install the valve lifters. Refer to Valve Lifter Replacement .
  19. Install the radiator support. Refer to Radiator Support Replacement .
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