Timing Chain & Sprockets: Installation
- Ensure crankshaft key is installed and fully seated. Using Tensioner Retractor (J-33875), retract timing chain tensioner shoe and lock it in place with a cotter pin, rivet, or nail. See Fig 2.
- Using upper hole as primary locator, install tensioner. Finger-tighten tensioner bolts. Tighten slotted bolt and then remaining bolts to specification. See TORQUE SPECIFICATIONS . Apply light coat of oil or lithium grease to chain contact surfaces of nylon pad and blade (if equipped).
- Install chain and sprocket assembly, aligning marks made during removal. During installation, keep assembly aligned (parallel). See Fig 3. Intermediate shaft may move against rear cover. Ensure rubber and tension blade of tensioner do not become caught, misaligned or dislodged.
- Large chamfer and counterbore on crankshaft sprocket must face engine. See Fig 1. Spline sockets on intermediate shaft sprocket must face engine.
- Crankshaft sprocket must be pressed onto crankshaft for the last .31" (8 mm) using Sprocket Installer (J-38612). Ensure timing is correct. Pull pin from tensioner. To complete installation, reverse removal procedure.
Courtesy of GENERAL MOTORS CORP.
Courtesy of GENERAL MOTORS CORP.
Courtesy of GENERAL MOTORS CORP.