Timing Chain and Sprockets Installation

Tools Required 

J 22102  Front Cover Aligner and Seal Installer

1. Use the J 22102  in order to install the crankshaft sprocket.

   Align the keyway of the crankshaft sprocket with the crankshaft pin.

2. Rotate the crankshaft until the crankshaft sprocket alignment mark is in the 12 o'clock position.
   Fig 1: Installing Crankshaft Sprocket Using J 22102

   Courtesy of GENERAL MOTORS CORP.
   NOTE: Do not hammer the camshaft sprocket onto the camshaft. To do so may dislodge the rear camshaft plug and damage the camshaft.

   Important:  Install the camshaft sprocket with the alignment mark in the 6 o'clock position.

   Important:  The sprocket teeth must mesh with the timing chain in order to prevent damage to the camshaft retainer.

3. Install the camshaft sprocket and timing chain.
   Fig 2: Camshaft Sprocket & Timing Chain

   Courtesy of GENERAL MOTORS CORP.
4. Look to ensure that the crankshaft sprocket is aligned at the 12 o'clock position and the camshaft sprocket is aligned at the 6 o'clock position.
   NOTE: Refer to FASTENER NOTICE in Cautions and Notices.
5. Install camshaft sprocket bolts.

   Tighten 

   • Tighten the three camshaft sprocket bolts to 30 N.m (22 lb ft).
   • Tighten the camshaft sprocket bolts in a second pass to 30 N.m (22 lb ft).
   Fig 3: Aligning Crankshaft & Camshaft Sprockets

   Courtesy of GENERAL MOTORS CORP.