Timing Chain and Sprockets Installation (L67)

Tools Required 

J 45059  Angle Meter

Fig 1: Locating Sprocket Timing Alignment Marks
Courtesy of GENERAL MOTORS CORP.
1. Install the crankshaft balancer key into the crankshaft keyway.

   The crankshaft balancer key should be parallel to the crankshaft or with a slight incline.

2. Install the timing chain on the sprockets. Align the timing marks.
Fig 2: Camshaft Sprocket, Crankshaft Sprocket & Timing Chain
Courtesy of GENERAL MOTORS CORP.
3. Install the timing chain, the crankshaft sprocket, and the camshaft sprocket.
NOTE: Refer to Special Fastener Notice in Cautions and Notices.
NOTE: Refer to Fastener Notice in Cautions and Notices.
4. Install the camshaft sprocket bolt.

   Tighten:  Tighten the camshaft sprocket bolt to 100 N.m (74 lb ft). Use J 45059  to tighten the camshaft sprocket bolt an additional 90 degrees.

Fig 3: View Of Timing Chain Dampener
Courtesy of GENERAL MOTORS CORP.
5. Install the timing chain dampener.

   Tighten:  Tighten the timing chain dampener bolt to 22 N.m (16 lb ft).