Timing Chain and Sprockets Installation

WARNING: This page is about a different car, the 2004 Pontiac Aztek and 2004 Buick Rendezvous. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: View Of Crankshaft Sprocket

Courtesy of GENERAL MOTORS CORP.

Install the crankshaft sprocket.
Apply prelube GM P/N United States 12345501, GM P/N Canada 992704 or the equivalent to the crankshaft sprocket thrust surface.

Fig 2: View Of Timing Chain Dampener & Bolts

Courtesy of GENERAL MOTORS CORP.

Install the timing chain dampener.

NOTE: Refer to Fastener Notice in Cautions and Notices.

Install the timing chain dampener bolts.
Tighten: Tighten the timing chain dampener bolt to 21 N.m (15 lb ft).

Fig 3: Locating Timing Marks

Courtesy of GENERAL MOTORS CORP.

Align the crankshaft timing mark (2) to the timing mark on the bottom of the timing chain dampener (1).
Hold the camshaft sprocket with the timing chain hanging down and install the timing chain to the crankshaft gear.
Align the timing mark on the camshaft gear (4) with the timing mark on top of the timing chain dampener (3).

Fig 4: View Of Timing Chain & Camshaft Sprocket

Courtesy of GENERAL MOTORS CORP.

Align the dowel in the camshaft with the dowel hole in the camshaft sprocket.
Draw the camshaft sprocket onto the camshaft using the mounting bolt.
Coat the crankshaft and camshaft sprocket with engine oil.
Tighten: Tighten the bolt to 140 N.m (103 lb ft).