GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 1997 🢒 Century 🢒 Engine 🢒 Engine Mechanical - 3.1L and 3.4L 🢒 Camshaft Timing Chain and Sprocket Cleaning and Inspection
  1. Inspect the camshaft and crankshaft sprockets for wear.
  2. Inspect the key and crankshaft keyway for wear.
  3. Inspect the timing chain for wear or binding.