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Home >> GMC >> 1997 >> C3500 HD 7.4 J, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 71 (Engine Mechanical - 4.3L V6 - VIN W & ,X) >> Removal & Installation >> Timing Chain & Sprockets >> Installation

Timing Chain & Sprockets: Installation

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  1. Install Woodruff key in crankshaft (if removed). Using Crankshaft Sprocket Installer (J-5590), install crankshaft sprocket. Install camshaft sprocket and timing chain. Ensure timing marks on sprockets are aligned. See Figure.
  2. Balance shaft drive gear, driven gear and gear bolt are serviced as a set. Install and tighten camshaft sprocket bolts to specification. See TORQUE SPECIFICATIONS .
    3. CAUTION: Failure to properly align CKP sensor reluctor ring may result in component damage and could affect system performance. CKP sensor reluctor ring is shaped like a dish. Dished side of CKP reluctor ring must face engine front cover.
    NOTE: DO NOT reinstall original composite front cover. Always install a NEW front cover. Reinstalling original front cover can lead to oil leaks.
  3. Install and align CKP sensor reluctor ring. See Figure. Install NEW front cover and gasket. Tighten front cover bolts to specification.
    4. CAUTION: Ensure CKP sensor is fully seated and held stationary in bore of front cover upon installation. A CKP sensor that is not fully seated may result in erratic engine operation.
  4. Install CKP sensor. Tighten CKP sensor holddown bolt to specification. See TORQUE SPECIFICATIONS .
  5. Apply RTV sealant to Woodruff keyway in crankshaft damper. Using Damper Puller/Installer (J-23523-F), install crankshaft balancer. Tighten fasteners to specification. See TORQUE SPECIFICATIONS . To complete installation, reverse removal procedure.
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