C 2500 Truck 2WD V8-6.6L DSL Turbo VIN 1 (2001)
1. Install the oil pressure relief valve with a new O-ring seal in the engine front cover.
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Tighten the oil pressure relief valve to 41 Nm (30 ft. lbs.).
2. Apply a 2 - 3 mm (1/8 inch) wide to 0.5 - 1.5 mm (1/6 inch) high bead of sealant GM P/N 12378521 or equivalent to the engine front cover
sealing surface to the engine block.
3. Apply a 2 - 3 mm (1/8 inch) wide to 0.5 - 1.5 mm (1/16 inch) high bead of sealant GM P/N 12378521 or equivalent to the engine front cover
sealing surface to the upper oil pan.
4. Install the new O-ring in the front cover. Lubricate the O-ring with clean engine oil.
