Timing Chain and Sprockets Removal

WARNING: This page is about a different car, the 2003 GMC Sonoma, 2003 GMC Jimmy, 2003 Chevrolet S10 Pickup, and 2003 Chevrolet Blazer. However, it is still accessible from the selected car via links, so may be relevant.

Tools Required

J 5825-A Crankshaft Gear Remover

Remove the crankshaft position sensor reluctor ring.

Fig 1: Removing Crankshaft Position Sensor Reluctor Ring
Courtesy of GENERAL MOTORS CORP.
Check the camshaft timing chain free play.
1. 2.1. Rotate the camshaft sprocket (1) counterclockwise until all slack is removed from the camshaft timing chain (2).
2. 2.2. Measure the free play on the slack side (3) of the camshaft timing chain.
  If the camshaft timing chain can be moved side to side in excess of 11 mm (0.43 in), replacement of the camshaft timing chain and the sprockets is recommended during assembly.
  
  Fig 2: Checking Camshaft Timing Chain Free Play
  Courtesy of GENERAL MOTORS CORP.
Remove the camshaft sprocket bolts.

Fig 3: Removing Camshaft Sprocket Bolts
Courtesy of GENERAL MOTORS CORP.
Remove the camshaft sprocket and the camshaft timing chain.

Fig 4: Removing Camshaft Sprocket & Timing Chain
Courtesy of GENERAL MOTORS CORP.

CAUTION: Refer to SAFETY GLASSES CAUTION in Cautions and Notices.
Remove the crankshaft sprocket using the J5825-A .

Fig 5: Using J 5825-A
Courtesy of GENERAL MOTORS CORP.
Remove the crankshaft balancer key.

Fig 6: Removing Camshaft Balancer Key
Courtesy of GENERAL MOTORS CORP.