Duramax LLY – ROCKER COVER AND OIL PAN SERVICE

Clean the pan and covers in cleaning solvent. Use carb cleaner on stubborn deposits if necessary. Inspect rocker covers and oil pan for cracks, sealing surface distortion, and dents. Repair minor dents. Replace either cover if damaged (Figure 2-150).

Inspect the oil pan for cracks, sealing surface distortion, dents, and damaged threads (Figure 2-151).
Small dents, not involving stretched metal, are not a cause for replacement. Larger dents involving stretched or creased metal will result in leaks.
Inspect the drainplug and pan for crossed or stripped threads and burred flats. Discard the plug gasket. Replace the drainplug if damaged.

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