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Home >> GMC >> 2003 >> Safari Van Cargo, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 257 (Engine Mechanical - 4.0L (On-Vehicle)) >> Repair Instructions >> Camshaft Replacement - Right >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2002 Oldsmobile Aurora. However, it is still accessible from the selected car via links, so may be relevant.
  1. Remove the right camshaft cover. Refer to Camshaft Cover Replacement - Right .
  2. Remove the camshaft position sensor. Refer to CAMSHAFT POSITION SENSOR .
  3. Rotate the crankshaft using the J 39946  to TDC of the # 1 cylinders compression stroke, both camshaft sprocket drive pins should be at the top of their rotation.
    Fig 1: Identifying Sprocket Drive Pins At Top Rotation
    G01819463Courtesy of GENERAL MOTORS CORP.
    WARNING: The camshaft holding tools must be installed on the camshafts to prevent camshaft rotation. When performing service to the valve train and/or timing components, valve spring pressure can cause the camshafts to rotate unexpectedly and can cause personal injury
  4. Install the J 44212  over the camshafts.
    Fig 2: Installing J 44212
    G01819464Courtesy of GENERAL MOTORS CORP.
  5. Use an open end wrench on the hex cast into the camshafts in order to prevent the camshafts from rotating when removing the camshaft sprocket bolts.
    Fig 3: Using Open End Wrench On Hex Cast
    G01819465Courtesy of GENERAL MOTORS CORP.
  6. Remove the camshaft sprocket bolts.
    Fig 4: Removing Camshaft Sprocket Bolts
    G01819466Courtesy of GENERAL MOTORS CORP.
  7. Install the J 44213 (1)  onto the front rail of the cylinder head.
    Fig 5: Installing J 44213
    G01819467Courtesy of GENERAL MOTORS CORP.
  8. Remove the right secondary camshaft drive chain shoe access plug.
    Fig 6: Removing Right Secondary Camshaft Drive Chain Shoe Access Plug
    G01819468Courtesy of GENERAL MOTORS CORP.
  9. Loosen the right secondary camshaft drive chain shoe bolt 2 full turns ONLY.
    Fig 7: Loosening Right Secondary Camshaft Drive Chain Shoe Bolt
    G01819469Courtesy of GENERAL MOTORS CORP.
  10. Slide the intake and exhaust camshaft sprockets onto the pins of the J 44213. 
    Fig 8: Slide Intake & Exhaust Camshaft Sprockets Onto J 44213 Pins
    G01819470Courtesy of GENERAL MOTORS CORP.
  11. Alternately loosen the camshaft bearing cap bolts a few turns at a time until all valve spring pressure has been released.
  12. Remove the camshaft bearing caps.
  13. Remove the J 44212  from the camshafts.
    Fig 9: Removing J 44212
    G01819471Courtesy of GENERAL MOTORS CORP.
  14. Remove the camshafts.
    Fig 10: Removing Camshafts
    G01819472Courtesy of GENERAL MOTORS CORP.
  15. Remove the camshaft followers.
  16. Clean and inspect the camshafts. Refer to CAMSHAFT CLEANING AND INSPECTION .
    Fig 11: Removing Camshaft Followers
    G01819473Courtesy of GENERAL MOTORS CORP.
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