Camshaft Timing Chain Installation

Special Tools

• EN-952  Fixing Pin
• EN-953-A  Fixing Tool
• EN-955-10  Fixing Pin from EN-955  Kit

For equivalent regional tools, refer to Special Tools .

1. The engine should be adjusted to TDC.
2. The crankshaft should be locked with EN-952  fixing pin.
3. The camshaft should be locked with EN-953-A  fixing tool.
4. Install the timing chain (1) along with the crankshaft sprocket (2).
   Fig 1: Timing Chain And Crankshaft Sprocket

   Courtesy of GENERAL MOTORS COMPANY
5. Install the timing chain tensioner shoe (1).
   Fig 2: Timing Chain Tensioner Shoe And Bolt

   Courtesy of GENERAL MOTORS COMPANY
6. Install the timing chain tensioner shoe bolt (2) and tighten to 20 N.m (15 lb ft).
   CAUTION: Refer to Fastener Caution .
7. Install the timing chain guide right side (1).
   Fig 3: Timing Chain Guide Right Side

   Courtesy of GENERAL MOTORS COMPANY
8. Install the 2 timing chain guide right side bolts (2) and tighten to 8 N.m (71 lb in).
9. Push the timing chain (2) in direction to the timing chain tensioner (1) and remove the EN-955-10  fixing pin (3).
   Fig 4: Timing Chain And Timing Chain Tensioner

   Courtesy of GENERAL MOTORS COMPANY

The upper timing chain guide will be installed after the installation of the engine front cover and the fastening of the camshaft sprockets.