Installation Procedure

WARNING: This page is about a different car, the 2003 GMC Sierra and 2003 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.

Install the 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
Courtesy of GENERAL MOTORS CORP.
Align the keyway of the crankshaft sprocket with the crankshaft balancer key.
Using J 5590 , install the crankshaft sprocket.

Fig 2: Install Crankshaft Sprocket Using J 5590
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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
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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: Camshaft & Sprocket Timing Mark
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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.
Install camshaft sprocket bolts.
Tighten

Tighten the bolts to 25 N.m (18 lb ft).
Remove the bolt that was installed in the end of the crankshaft.
Install the CKP sensor reluctor ring. Refer to Crankshaft Position (CKP) Reluctor Ring Replacement .

Fig 5: Camshaft Sprocket Bolts
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