For 1990-2009 cars

### Cleaning Procedure

1. Clean the camshaft covers in solvent.

Caution: Refer to Safety Glasses Caution in the Preface section.

2. Dry the camshaft covers with compressed air.

### Inspection Procedure

1. Inspect each camshaft cover for the dents or damage to the exterior. A dented or damaged camshaft cover may:

• | Leak engine oil.

• | Effect crankcase ventilation.

• | Interfere with the camshafts.

• | Interfere with the ignition coil sealing.

• | Allow water or condensation to enter the engine.

2. Inspect the exterior of the left camshaft cover for the following conditions:

• | Damage to the camshaft cover bolt holes (1).

• | Damage to the oil fill hole (2).

• | Damage to the mounting holes (3) for the ignition coil assembly.

• | Damage to the Positive Crankcase Ventilation (PCV) hose connector (4) -- A damaged PCV hose connector is replaceable.

3. Inspect the interior of the left camshaft cover for the following conditions:

• | Gouges or damage to the camshaft cover sealing groove (1).

• | Damaged, loose or missing baffle fasteners (2).

• | Damaged, loose or missing baffle (3).

• | Gouges or damage to the ignition coil seal bore (4).

• | Restrictions to the ventilation system (5).

4. Inspect the exterior of the right camshaft cover for the following conditions:

• | Damage to the camshaft cover bolt holes (1).

• | Damage to the mounting holes (2) for the ignition coil assembly.

• | Damage to the PCV orifice (3) -- A damaged PCV orifice can be replaced. Refer to PCV Orifice Replacement.

5. Inspect the interior of the right camshaft cover for the following conditions:

• | Gouges or damage to the camshaft cover sealing groove (1).

• | Gouges or damage to the ignition coil seal bore (2).

• | Restrictions to the ventilation system (3).

6. Repair or replace the camshaft cover or covers as necessary.

### PCV Orifice Replacement

Important: If the PCV orifice is damaged or plugged and cannot be cleaned out, the PCV orifice can be replaced.

Important: Remove the PCV orifice (1) by griping the neck of the PCV orifice (1) with pliers and twisting and pulling out of the right camshaft cover (2).

1. Remove the PCV orifice (1) from the right camshaft cover (2).
2. Apply a Holden approved sealant to the NEW PCV orifice (1).
3. Install the NEW PCV orifice (2) into the right camshaft cover (1). After insertion, twist the PCV orifice (2) in order to address any vertical leak paths in the sealant.

### PCV Fitting Replacement

Important: If the PCV fitting (1) is damaged or plugged and cannot be cleaned out, the PCV fitting (1) can be replaced.

Important: The PCV fitting O-ring (2) is a single use component and must be discarded whenever the PCV fitting (1) is removed.

1. Remove the PCV fitting (1).

Discard the PCV fitting O-ring (2).

2. Install the NEW PCV fitting (1) with a NEW PCV fitting O-ring (2).