Installation Procedure

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

Fig 1: Crankshaft Balancer Key & Crankshaft Keyway
Courtesy of GENERAL MOTORS CORP.
Align the keyway of the crankshaft sprocket with the crankshaft balancer key.
Use the J 5590 in order to install the crankshaft sprocket.

Fig 2: Installing Crankshaft Sprocket Using J 5590
Courtesy of GENERAL MOTORS CORP.

Important: Install the camshaft sprocket with the alignment mark at the 6 o'clock position
Install the camshaft sprocket and the camshaft timing chain

Fig 3: Camshaft Sprocket & Timing Chain
Courtesy of GENERAL MOTORS CORP.
Look to ensure that the crankshaft sprocket is aligned at the 12 o'clock position and camshaft sprocket is aligned at the 6 o'clock position

Fig 4: Aligning Crankshaft & Camshaft Sprockets
Courtesy of GENERAL MOTORS CORP.

NOTE: Refer to FASTENER NOTICE .

Important: Do not use a hammer to install the camshaft sprocket onto the camshaft. To do so may dislodge the expansion cup plug (camshaft rear bearing hole).
Install camshaft sprocket bolts.
Tighten

Tighten the camshaft sprocket bolts to 25 N.m (18 lb ft).

Fig 5: Camshaft Sprocket Bolt
Courtesy of GENERAL MOTORS CORP.
Install the crankshaft position sensor reluctor ring.
1. 7.1. Align the keyway on the crankshaft position sensor reluctor ring with the crankshaft balancer key in the crankshaft.
2. 7.2. Use the J 5590 in order to push the crankshaft position sensor reluctor ring onto the crankshaft until completely seated against the crankshaft sprocket.
3. 7.3. Remove the bolt that was installed in the end of the crankshaft.
4. 7.4. Install the engine front cover. Refer to Engine Front Cover Replacement .
Fig 6: Installing Crankshaft Position Sensor Reluctor Ring Using J 5590
Courtesy of GENERAL MOTORS CORP.