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Home >> Isuzu >> 2007 >> i-290 LS, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 84 (Engine Mechanical - 3.7L) >> Repair Instructions >> On-Vehicle Repair Instructions >> Timing Chain and Sprockets Replacement >> Installation Procedure

Installation Procedure

WARNING: This page is about a different car, the 2007 Isuzu i-370, 2007 GMC Canyon, and 2007 Chevrolet Colorado. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: View Of Timing Chain & Sprockets
    GM637578Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: Ensure the #1 piston is at TDC. The pin on the crankshaft for the timing chain sprocket should be straight up.
  1. Install the crankshaft sprocket to the crankshaft snout.
    2. IMPORTANT: Every 7th link of the timing chain is darkened to aid in aligning the timing marks.
  2. Install the intake camshaft sprocket into the timing chain.

    Aligning the dark link (1) of the timing chain with the timing mark on the intake camshaft sprocket.

  3. Feed the timing chain down through the opening in the cylinder head.
  4. Install the timing chain on the crankshaft sprocket.

    Aligning the dark link (2) of the timing chain with the timing mark on to the crankshaft sprocket.

    5. IMPORTANT: Ensure the alignment pin is properly engaged with the camshaft
  5. Install the intake camshaft sprocket onto the intake camshaft.
    6. Fig 2: View Of Intake Camshaft Sprocket Washer & Bolt
    GM748325Courtesy of GENERAL MOTORS CORP.
    NOTE: Refer to Fastener Notice .
  6. Install the new intake camshaft sprocket bolt.

    Tighten:  Tighten the bolt to 20 N.m (15 lb ft) plus an additional 100 degrees using the J 45059  .

  7. Ensure the camshaft actuator is fully advanced prior to installation. Refer to Camshaft Position Actuator Diagnosis .
    8. Fig 3: Aligning Exhaust Camshaft Position Actuator
    GM637782Courtesy of GENERAL MOTORS CORP.
  8. Install the exhaust camshaft actuator into the timing chain.

    Aligning the dark link (1) of the timing chain with the timing mark (1) on the exhaust camshaft position actuator sprocket.

    9. NOTE: The camshaft actuator must be fully advanced during installation. Engine damage may occur if the camshaft actuator is not fully advanced.
    IMPORTANT:
    • To aid in aligning the actuator to the camshaft, use a 25 mm (1 in) wrench on the hex of the camshaft to rotate
    • Ensure the alignment pin is properly engaged with the camshaft
  9. Install the exhaust camshaft actuator onto the exhaust camshaft.
    10. Fig 4: View Of CMP Actuator
    GM858340Courtesy of GENERAL MOTORS CORP.
  10. Install the new exhaust camshaft actuator bolt.

    Tighten:  Tighten the bolt to 25 N.m (18 lb ft) plus an additional 135 degrees using the J 45059  .

    11. Fig 5: View Of Tee At Timing Chain Tensioner
    GM760718Courtesy of GENERAL MOTORS CORP.
  11. Remove the tee in the timing chain tensioner to regain tension on the timing chain.
    12. Fig 6: View Of J 44221 Installed On Camshafts
    GM858336Courtesy of GENERAL MOTORS CORP.
  12. Remove the J 44221  from the camshafts.
    13. Fig 7: View Of Timing Chain Marked Links
    GM858344Courtesy of GENERAL MOTORS CORP.
  13. The dark links (1) on the timing chain should be aligned with the marks on the sprockets as shown.
  14. Install the engine front cover. Refer to Engine Front Cover Replacement .
  15. Install the intake CMP sensor. Refer to Camshaft Position Sensor Replacement - Intake .
  16. Install the exhaust CMP sensor. Refer to Camshaft Position Sensor Replacement - Exhaust .
  17. Install the camshaft cover. Refer to Camshaft Cover Replacement .
  18. Install #1 cylinder spark plug. Refer to Spark Plug Replacement .
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