Timing Chain and Sprockets Installation

Tools Required 

J 22102  Front Cover Aligner and Seal Installer. See Special Tools .

Fig 1: Installing Crankshaft Sprocket Using J 22102
Courtesy of GENERAL MOTORS CORP.
1. Use the J 22102  in order to install the crankshaft sprocket. See Special Tools .

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

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.
Fig 2: View Of Camshaft Sprocket, Timing Chain & Bolts
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.
4. Install the camshaft sprocket and timing chain.
Fig 3: View Of Crankshaft & Camshaft Sprockets Aligned
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).