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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> Engine Mechanical >> Mechanical >> Engine Mechanical - 4.3L (On-Vehicle) >> Repair Instructions >> Valve Lifter Replacement >> Removal Procedure

Removal Procedure

  1. Remove the lower intake manifold. Refer to Intake Manifold Replacement - Lower .
  2. Remove the valve rocker arms and the valve pushrods. Refer to Valve Rocker Arm and Push Rod Replacement .

    Important:  Place the components in a rack so that the components can be reinstalled to their original location

  3. Remove the bolts and valve lifter pushrod guide.
    Fig 1: Valve Lifter Pushrod Guide & Engine Block
    G01661126Courtesy of GENERAL MOTORS CORP.

    Important:  Place the valve lifters in the rack in the upright position in order to maintain the oil inside the valve lifters.

  4. Remove the valve lifters.
    Fig 2: Valve Lifters
    G01661127Courtesy of GENERAL MOTORS CORP.

    Important:  Some valve lifters may be stuck in the valve lifter bores because of gum or varnish deposits and may require the use of J3049-A  for removal.

  5. Use the J 3049-A in order to remove the stuck valve lifters.
  6. Use a cleaning solvent and a shop towel to clean any varnish from the valve lifter bores.
  7. Inspect the valve lifter bores for excessive wear or scoring. Replace the engine block if there is excessive wear or deep scoring.
  8. Inspect the camshaft for wear or damage. If the wear is questionable remove the camshaft and inspect. Refer to CAMSHAFT AND BEARINGS CLEANING AND INSPECTION .
    Fig 3: Removing Valve Lifters Using J 3049-A
    G01661128Courtesy of GENERAL MOTORS CORP.

    Important:  Components that are to be reused must be marked, sorted, and organized for assembly.

  9. Mark, sort, and organize the components for assembly.
  10. Clean the components in cleaning solvent.
  11. Dry the components with compressed air.
    Fig 4: Valve Lifter Pushrod Guide & Valve Lifters
    G01661129Courtesy of GENERAL MOTORS CORP.
  12. Inspect the valve lifter pushrod guides for excessive wear.
  13. Inspect the valve lifter pushrod guides for cracks or damage.
    Fig 5: Valve Lifter Pushrod Guide
    G01661130Courtesy of GENERAL MOTORS CORP.
  14. Inspect the valve lifter for the following:
    • Broken or damaged clip (1)
    • Worn pushrod socket (2)
    • Scuffed or worn lifter body (3)

      If the valve lifter shows scuffing or wear, inspect the engine block valve lifter bores for wear.

    • Worn roller (4)
    • Loose or damaged pin (5)
    • Plugged oil hole (6)
    Fig 6: Inspecting Valve Lifter
    G01661131Courtesy of GENERAL MOTORS CORP.
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