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Home >> Chevrolet >> 2020 >> Express 2500 LS, 6.0L Eng VIN G >> Repair and Diagnosis >> External Pages >> Different car >> Section 8 (Engine Mechanical - 6.0L (L96 LC8)) >> Repair Instructions - Off Vehicle >> Timing Chain, Crankshaft Sprocket, Camshaft Position Actuator, and Solenoid Valve Installation

Timing Chain, Crankshaft Sprocket, Camshaft Position Actuator, and Solenoid Valve Installation

WARNING: This page is about a different car, the 2019 GMC Savana 3500, 2019 GMC Savana 2500, 2019 Chevrolet Express 3500, and 2019 Chevrolet Express 2500. However, it is still accessible from the selected car via links, so may be relevant.

Special Tools

Equivalent regional tools: Special Tools 

  1. GM156149Courtesy of GENERAL MOTORS COMPANY

    Install the key into the crankshaft keyway, if previously removed.

  2. GM1272887Courtesy of GENERAL MOTORS COMPANY

    Tap the key (122) into the keyway until both ends of the key bottom onto the crankshaft.

  3. GM1658182Courtesy of GENERAL MOTORS COMPANY

    Install the crankshaft sprocket (207) onto the front of the crankshaft. Align the crankshaft key with the crankshaft sprocket keyway.

  4. GM1658237Courtesy of GENERAL MOTORS COMPANY

    Use the J-41478  installer (1) and the J-41665  installer (2) in order to install the crankshaft sprocket. Install the sprocket onto the crankshaft until fully seated against the crankshaft flange.

  5. Rotate the crankshaft sprocket until the sprocket alignment mark is in the 12 o'clock position.
  6. GM1658249Courtesy of GENERAL MOTORS COMPANY

    Compress the timing chain tensioner guide and install the EN-46330  pin.

  7. GM1670620Courtesy of GENERAL MOTORS COMPANY
    CAUTION:

    Refer to Fastener Caution .

    Install the timing chain tensioner (232) and left side bolt (231). Do not install the right side bolt at this time. The right side bolt will be installed after the camshaft position (CMP) actuator and chain have been installed onto the engine.

  8. GM1714946Courtesy of GENERAL MOTORS COMPANY

    Remove the tie strap (1) from the actuator.

  9. GM1658240Courtesy of GENERAL MOTORS COMPANY
    NOTE:
    • Properly locate the CMP actuator onto the locating pin of the camshaft.
    • The sprocket teeth and timing chain must mesh.
    • The camshaft and the crankshaft sprocket alignment marks MUST be aligned properly.
    • Do not use the CMP solenoid valve again. Install a NEW valve during assembly.

    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.

  10. GM1714942Courtesy of GENERAL MOTORS COMPANY

    Install the CMP actuator and timing chain. Align the hole in the rear face of the CMP actuator with the locating pin on the front face of the camshaft. If necessary, rotate the camshaft or crankshaft sprockets in order to align the timing marks. Use care to install the actuator completely onto the front of the camshaft. Position fingers onto the face of the actuator sprocket and push the actuator onto the front of the camshaft. Never push on the reluctor wheel when attempting to install the actuator.

  11. GM1670626Courtesy of GENERAL MOTORS COMPANY

    Locate 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 camshaft, the timing chain will not protrude beyond the front face of engine block.

  12. GM1670622Courtesy of GENERAL MOTORS COMPANY

    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. GM1670623Courtesy of GENERAL MOTORS COMPANY

    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. GM1670624Courtesy of GENERAL MOTORS COMPANY

    Install the right side bolt (231) into the timing chain tensioner and tighten both bolts to 30 N.m (22 lb ft).

  15. GM1658253Courtesy of GENERAL MOTORS COMPANY

    Remove the EN-46330  pin.

  16. GM1658140Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Do not apply threadlock to the flex plate bolts at this time.

    Temporarily install the automatic transmission flex plate and bolts. Refer to Automatic Transmission Flex Plate Installation .

  17. GM1658136Courtesy of GENERAL MOTORS COMPANY

    Install the J-42386-A  tool (1) and bolts. Use 1 M10 - 1.5 x 120 mm and 1 M10 - 1.5 x 45 mm bolt for proper tool operation. Tighten the J-42386-A  tool bolts to 50 N.m (37 lb ft).

  18. GM1658245Courtesy of GENERAL MOTORS COMPANY

    Tighten the CMP actuator solenoid valve.

    1. Tighten the CMP actuator solenoid valve a first pass to 65 N.m (48 lb ft).
    2. Tighten the CMP actuator solenoid valve a final pass an additional 90 degrees using the J-45059  meter.
  19. Remove the J-42386-A  tool and bolts.
  20. Remove the automatic transmission flex plate and bolts. Refer to Automatic Transmission Flex Plate Removal .