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.

Fig 1: Installing Crankshaft Sprocket Using J 22102
Courtesy of GENERAL MOTORS CORP.
2. Inspect the sprocket pin for proper installation. Refer to Crankshaft and Bearings Cleaning and Inspection .
3. Rotate the crankshaft until the crankshaft sprocket alignment mark is in the 12 o'clock position.
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.
4. Install the camshaft sprocket and timing chain.
Fig 2: View Of Camshaft Sprocket, Timing Chain & Bolts
Courtesy of GENERAL MOTORS CORP.
5. 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.
6. Install camshaft sprocket bolts.

   Tighten:  Tighten the camshaft sprocket bolts to 30 N.m (22 lb ft).

Fig 3: View Of Crankshaft & Camshaft Sprockets Aligned
Courtesy of GENERAL MOTORS CORP.