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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 >> Engine Front Cover 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.
  4. Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnect/Connect Procedure (Single Battery) or Battery Negative Cable Disconnect/Connect Procedure (Auxiliary Battery) in Engine Electrical.
  5. Remove the right fender wheelhouse panel. Refer to Wheelhouse Panel Replacement in Body Front End.
  6. Remove the upper fan shroud. Refer to Fan Shroud Replacement - Upper (W/O M74) or Fan Shroud Replacement - Upper (W/M74) in Engine Cooling.
  7. Remove the oil fill tube. Refer to Oil Fill Tube Replacement .
  8. Remove the crankshaft front oil seal. Refer to Crankshaft Front Oil Seal Replacement .
  9. Remove the water pump. Refer to Water Pump Replacement (6.6L (LB7) Engine) in Engine Cooling.
  10. Disconnect the camshaft position (CMP) sensor electrical connector.
  11. Remove the CMP sensor bolt and sensor.
    12. Fig 2: View Of CMP Sensor & Bolt
    GM660340Courtesy of GENERAL MOTORS CORP.
  12. Disconnect the crankshaft position (CKP) sensor electrical connector.
  13. Remove the CKP sensor bolt and sensor.
  14. Remove the CKP sensor spacer bolts and spacer.
    15. Fig 3: View Of CKP Sensor, Spacer & Bolts
    GM663804Courtesy of GENERAL MOTORS CORP.
  15. Remove and discard the O-rings from the CKP sensor and spacer.
  16. Remove the upper oil pan to engine front cover bolts.
    17. Fig 4: View Of Upper Oil Pan To Engine Front Cover Bolts
    GM738866Courtesy of GENERAL MOTORS CORP.
  17. Remove the turbocharger coolant feed pipe bracket bolts and bracket.
    18. Fig 5: View Of Turbocharger Coolant Feed Pipe, Bracket & Bolts
    GM699335Courtesy of GENERAL MOTORS CORP.
  18. Remove the engine front cover bolts.
  19. Separate the engine front cover from the cylinder block and upper oil pan using J 37228  .
    20. IMPORTANT: Do not bend the turbocharger coolant pipe.
  20. Remove the engine front cover.
    21. Fig 6: View Of Engine Front Cover & Bolts
    GM738865Courtesy of GENERAL MOTORS CORP.
  21. If necessary, remove the pressure relief valve O-ring.
    22. Fig 7: View Of Pressure Relief Valve O-Ring
    GM793901Courtesy of GENERAL MOTORS CORP.
  22. Clean and inspect the front cover. Refer to Engine Front Cover Cleaning and Inspection .
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