Removal Procedure

Fig 1: View Of Engine Harness Electrical Connectors & Inlet Hose Clamp

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Remove the intake manifold. Refer to Intake Manifold Replacement (RPOs LY2/LY6) or Intake Manifold Replacement (RPOs LC9/LMG/LY5/L76) or Intake Manifold Replacement (RPO L92 - First Design) or Intake Manifold Replacement (RPO L92 - Second Design) .
Disconnect the engine harness electrical connector (1) from the oil pressure sensor.

Fig 2: DO NOT Lift The Manifold Assembly By The Electrical Lead Frame

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DO NOT lift the valve lifter oil manifold by the electrical lead frame.

Fig 3: Identifying Valve Lifter Oil Manifold

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Remove the valve lifter oil manifold bolts (2).
Remove the valve lifter oil manifold (1).

Fig 4: Gasket Retaining Strap Locations

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IMPORTANT: Remove only the outer gasket from the manifold. Do not disassemble any of the internal components of the manifold in an attempt to remove the 8 inner sealing gaskets. If the inner gaskets are cut or damaged, replace the manifold as an assembly. Only use a wire-cutter type tool in order to minimize the amount of debris. Do not use a rotary-type cutting tool on the retaining straps.

Identify the 8 gasket retaining strap locations (1-8).

Fig 5: Retaining Strap

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Using a cutter type tool, cut the 8 retaining straps.

Fig 6: Identifying Valve Cover Outer Gasket

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Remove the outer gasket (1) from the valve lifter oil manifold.