LEMON Manuals: Even more car manuals for everyone
Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 161 (Engine Mechanical - 4.8L, 5.3L, 6.0L And 6.2L (4 Of 5)) >> Off-Vehicle Repair Instructions (2 Of 3) >> Valve Lifter Oil Manifold Cleaning and Inspection

Valve Lifter Oil Manifold Cleaning and Inspection

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2007 GMC Yukon XL, 2007 GMC Yukon, 2007 Chevrolet Tahoe, 2007 Chevrolet Suburban, and 2007 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: Valve Lifter Oil Manifold
    GM1536553Courtesy of GENERAL MOTORS CORP.
    IMPORTANT:
    • Do not allow dirt or debris to enter the oil passages of the manifold. Plug, as required.
    • Do not disassemble the electrical components from the manifold.
    • Do not submerge the electrical components in cleaning solvent.
    • Do not use the manifold exterior gasket again. Remove the exterior gasket and install a NEW service gasket during assembly.
  1. Do not lift the manifold assembly by the electrical lead frame.
    2. Fig 2: View Of Oil Pressure Sensor, Washer & Valve Lifter Oil Filter
    GM1402008Courtesy of GENERAL MOTORS CORP.
  2. Remove the oil pressure sensor (706) and washer (707).
  3. Remove the oil screen (452) with O-ring (454).
    4. CAUTION: Refer to Safety Glasses and Compressed Air Caution .
  4. Clean the manifold with compressed air.
    5. Fig 3: Electrical Solenoids
    GM1402153Courtesy of GENERAL MOTORS CORP.
  5. Inspect for loose electrical solenoids (1-4) or loose or missing bolts.
  6. Inspect for damage to the electrical lead frame (5).
  7. Inspect for a damaged electrical connector, for bent or corroded pins.
    8. Fig 4: Sealing Gaskets
    GM1402154Courtesy of GENERAL MOTORS CORP.
  8. Inspect for damaged interior sealing gaskets (1-8). If the interior sealing gaskets are damaged, the manifold must be replaced as an assembly.
  9. Inspect for a damaged exterior sealing gasket (9) or scored gasket surfaces.
  10. Inspect for debris or restrictions within the oil passages of the manifold. Refer to Cylinder Deactivation (Active Fuel Management) Valve Lifter Oil Manifold Diagnosis and Testing .
scientia non olet · About LEMON Manuals