PRE-RELEASE
Camshaft Cover Cleaning and Inspection
| Camshaft Cover Cleaning and Inspection |
| Cleaning Procedure |
| 1. |
Clean the camshaft covers in solvent.
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| 2. |
Refer to
Safety Glasses Warning
.
Dry the camshaft covers with compressed air. |
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| Inspection Procedure |
| 1. |
Inspect each camshaft cover for the dents or damage to the exterior. A dented or damaged camshaft cover may:
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Leak engine oil
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Effect crankcase ventilation
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Interfere with the camshafts
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Interfere with the ignition coil sealing
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Allow water or condensation to enter the engine
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| 2. |
Inspect the exterior of the left camshaft cover for the following conditions:
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Damage to the camshaft cover bolt holes (1)
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Damage to the oil fill tube (2)
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Damage to the mounting holes (3) for the ignition coil assembly and fuel injector sight shield ballstud.
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Damage to the positive crankcase ventilation (PCV) hose connector (4)-A damaged PCV hose connector is replaceable.
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| 3. |
Inspect the interior of the left camshaft cover for the following conditions:
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Gouges or damage to the camshaft cover sealing groove (1)
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Damaged, loose or missing baffle fasteners (2)
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Damaged, loose or missing baffle (3)
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Gouges or damage to the spark plug shield seal bore (4)
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Restrictions to the ventilation system (5)
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| 4. |
Inspect the exterior of the right camshaft cover for the following conditions:
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Damage to the PCV orifice (1)-A damaged PCV orifice can be replaced. Refer to PCV Orifice Replacement.
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Damage to the mounting holes (2) for the ignition coil assembly
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Damage to the camshaft cover bolt holes (3)
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| 5. |
Inspect the interior of the right camshaft cover for the following conditions:
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Restrictions to the ventilation system (1)
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Gouges or damage to the spark plug shield seal bore (2)
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Gouges or damage to the camshaft cover sealing groove (3)
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| 6. |
Repair or replace the camshaft cover or covers as necessary.
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| PCV Orifice Replacement |
| 1. |
Remove the old PCV orifice by gripping the neck of the orifice with pliers and twisting and pulling out of the right camshaft cover. 
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| 2. |
Apply sealant GM P/N 12378521 (Canadian P/N 88901148) or equivalent to the NEW PCV orifice (1).
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| 3. |
Install the NEW PCV orifice into the right camshaft cover. After insertion, twist the PCV orifice in order to eliminate any vertical leak paths in the sealant.
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| PCV Fitting Replacement |
| 1. |
Remove the old PCV fitting. 
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| 2. |
Install the new PCV fitting with a NEW O-ring.
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