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Home >> GMC >> 1991 >> Value Van 7.4 N >> Repair and Diagnosis (Single Page) >> Engine Mechanical >> Mechanical >> 6.2L V8 Diesel - VINS [C,J] >> Removal & Installation >> Timing Chain Free Play >> Installation

Timing Chain Free Play: Installation

  1. Install crankshaft sprocket (if removed). Install camshaft sprocket and timing chain as an assembly, ensuring timing marks are aligned. See Figure. Install camshaft gear, washer and bolt. Tighten camshaft gear bolt to specification. See TORQUE SPECIFICATIONS table.
  2. Install new front cover oil seal using Seal Installer (J-22102). Coat seal lip and crankshaft damper sealing surface with engine oil. Apply 3/32" (2 mm) bead of anaerobic sealant to front cover at front cover-to-cylinder block sealing surface. Apply 3/16" (5 mm) bead of RTV sealant to front cover at front cover-to-oil pan sealing surface.
  3. Install front cover. Tighten front cover bolts and oil pan bolts to specification. Install baffle (if equipped). If installing new front cover, place a timing mark on new front cover. See MARKING TDC ON FRONT COVER.
  4. Install injection pump gasket and injection pump, aligning timing marks on injection pump flange and front cover. Install injection pump gear, ensuring timing marks on injection pump gear and camshaft gear are aligned. See Figure. Tighten gear bolts to specification.
  5. Ensure .040" (1.0 mm) minimum clearance exists between baffle and injection pump gear. To complete installation, reverse removal procedure. Fill cooling system. Adjust injection pump timing if timing chain, sprockets or injection pump gears were replaced.
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