Express 3/4 Ton Van V8-4.8L VIN V (2003)
Important:
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Do not reuse the crankshaft oil seal or rear cover gasket.
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Do not apply any type of sealant to the rear cover gasket (unless specified).
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The special tool in this procedure is used to properly center the crankshaft rear oil seal.
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The crankshaft rear oil seal will be installed after the rear cover has been installed and aligned. Install the rear cover without the crankshaft oil
seal.
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All gasket surfaces should be free of oil or other foreign material during assembly.
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The crankshaft rear oil seal MUST be centered in relation to the crankshaft.
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An improperly aligned rear cover may cause premature rear oil seal wear and/or engine assembly oil leaks.
1. Apply a 5 mm (0.20 inch) bead of sealant GM U.S. P/N 12378190, or equivalent 20 mm (0.80 inch) long to the oil pan to engine block junction.
2. Install the rear cover gasket and cover.
3. Install the rear cover bolts until snug. Do not overtighten.
