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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 >> Camshaft 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.
  1. Coat the camshaft journals, camshaft journal thrust face, and camshaft lobes with clean engine oil.
    2. Fig 1: Installing J 44221 To Camshafts
    GM858334Courtesy of GENERAL MOTORS CORP.
  2. Install the J 44221  with the camshaft flats up and the #1 piston at TDC.
  3. Install the intake and exhaust camshafts to their original positions.
    4. Fig 2: Identifying Camshaft Bearing Cap Markings
    GM53008Courtesy of GENERAL MOTORS CORP.
  4. Observe the markings on the camshaft caps. Each camshaft cap is marked in order to identify its location. The markings have the following meanings:
    • The arrow should point to the front of the engine
    • The number indicates the position from the front of the engine
    • The "E" indicates the exhaust camshaft.
    • The "I" indicates the intake camshaft.
    5. Fig 3: View Of Camshaft Caps
    GM858183Courtesy of GENERAL MOTORS CORP.
  5. Install the camshaft caps according to the identification marks.
    6. NOTE: Refer to Fastener Notice .
  6. Install the camshaft cap bolts. Tighten the bolts evenly in order to compress the valve springs before final torque.

    Tighten:  Tighten the bolts to 12 N.m (106 lb in).

    7. Fig 4: View Of J 44222 Installed Onto Cylinder Head
    GM760724Courtesy of GENERAL MOTORS CORP.
    IMPORTANT:
    • To aid in aligning the sprockets to the camshafts, use a 25 mm (1 in) wrench on the hex of the camshafts to rotate
    • Ensure the alignment pins are properly engaged with the camshafts
  7. Carefully slide the sprockets with the timing chain from the J 44222  to the camshafts.
  8. Remove the J 44222  from the cylinder head.
  9. Install the new intake camshaft sprocket bolt.
  10. Install the new exhaust camshaft actuator bolt.

    Tighten: 

    1. Tighten the intake camshaft sprocket bolt to 20 N.m (15 lb ft) plus an additional 100 degrees using the J 45059  .
    2. Tighten the exhaust camshaft actuator bolt to 25 N.m (18 lb ft) plus an additional 135 degrees using the J 45059  .

    11. Fig 5: View Of J 44221 Installed On Camshafts
    GM858336Courtesy of GENERAL MOTORS CORP.
  11. Remove the J 44221  from the camshafts.
  12. Install the Intake CMP sensor. Refer to Camshaft Position Sensor Replacement - Intake .
  13. Install the exhaust CMP sensor. Refer to Camshaft Position Sensor Replacement - Exhaust .
  14. Install the camshaft cover. Refer to Camshaft Cover Replacement .
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