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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1023 (Engine Mechanical - 6.6L (Lb7) (Repair Instructions 1 Of 4)) >> Repair Instructions (On-Vehicle & Off Vehicle - Part 1) >> On-Vehicle Repair Instructions >> Crankcase Ventilation Hoses/Pipes Replacement >> Removal Procedure

Removal Procedure

WARNING: This page is about a different car, the 2004 GMC Sierra, 2004 GMC Cab & Chassis Sierra, 2004 Chevrolet Silverado, and 2004 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
  1. Loosen the outlet duct clamp at the upper intake manifold cover.
  2. Remove the upper intake manifold cover from the outlet duct.
  3. Remove the upper intake manifold cover.
    4. Fig 1: View Of Upper Intake Manifold Cover, Outlet Duct & Clamp
    GM813243Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: After removing the turbocharger air ducts, cover the turbocharger openings with tape to prevent entry of objects.
  4. If removing the right side hose, loosen the outlet duct clamps at the turbocharger and the mass air flow/intake air temperature (MAF/IAT) sensor.
  5. Remove the outlet duct.
    6. Fig 2: View Of Outlet Duct
    GM813244Courtesy of GENERAL MOTORS CORP.
  6. If removing the right side hose, loosen the charged air cooler outlet duct to intake hose clamp (1).
    7. IMPORTANT: Do not use a screwdriver or other tool to pry the hose loose. The hose can be torn or damaged. Loosen the hose by twisting.
  7. Remove the charged air cooler outlet duct from the intake.
    8. Fig 3: View Of Charged Air Cooler Outlet Duct & Clamps
    GM877275Courtesy of GENERAL MOTORS CORP.
  8. If removing the left side hose, loosen the charged air cooler inlet duct to turbocharger clamp (1).
    9. IMPORTANT: Do not use a screwdriver or other tool to pry the hose loose. The hose can be torn or damaged. Loosen the hose by twisting.
  9. Remove the charged air cooler inlet duct from the turbocharger.
    10. Fig 4: View Of Charged Air Cooler Inlet Duct & Clamps
    GM877281Courtesy of GENERAL MOTORS CORP.
  10. In order to access the right side hose, remove the heater outlet hose nut (1) and bolt (2).
    11. Fig 5: View Of Heater Outlet Nut & Bolt
    GM665386Courtesy of GENERAL MOTORS CORP.
  11. Position the heater outlet hose out of the way.
  12. Disconnect both of the positive crankcase ventilation (PCV) hoses from the rocker covers.
    13. Fig 6: View Of Crankcase Ventilation Hoses At Valve Rocker Arm Covers
    GM687021Courtesy of GENERAL MOTORS CORP.
  13. Disconnect the PCV oil separator drain hose from the engine block.
  14. Disconnect the hose from the oil separator.
    15. Fig 7: View Of PCV Oil Separator Drain Hose
    GM687093Courtesy of GENERAL MOTORS CORP.
  15. Remove the oil separator and hoses.
  16. Inspect the all of the PCV hoses for damage.
  17. Inspect the oil separator for cracks or damage.
  18. Replace any parts found with damage.
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