Timing Chain and Sprockets Removal: Removal

WARNING: This page is about a different car, the 2008 GMC Sierra and 2008 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: View Of Crankshaft Position Sensor Reluctor Ring

Courtesy of GENERAL MOTORS CORP.

Remove the crankshaft position sensor reluctor ring.

Fig 2: View Of Timing Chain Tensioner Bracket, Bolt & Shoe

Courtesy of GENERAL MOTORS CORP.

Remove the timing chain tensioner shoe (229) using a downward motion.
Remove the timing chain tensioner bracket bolt and bracket (227 and 228).

Fig 3: Checking Camshaft Timing Chain Free Play

Courtesy of GENERAL MOTORS CORP.

Check the camshaft timing chain free play.
1. Rotate the camshaft sprocket (1) counterclockwise until all slack is removed from the camshaft timing chain (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), dimension a, replacement of the camshaft timing chain and the sprockets is recommended during assembly.

Fig 4: Camshaft Sprocket & Bolts

Courtesy of GENERAL MOTORS CORP.

Remove the camshaft sprocket bolts.

Fig 5: Camshaft Sprocket And The Camshaft Timing Chain

Courtesy of GENERAL MOTORS CORP.

Remove the camshaft sprocket and the camshaft timing chain.

Fig 6: J 5825-A

Courtesy of GENERAL MOTORS CORP.

CAUTION: Refer to SAFETY GLASSES CAUTION .

Remove the crankshaft sprocket using the J 5825-A . See Special Tools .

Fig 7: Locating Crankshaft Balancer Key

Courtesy of GENERAL MOTORS CORP.

Remove the crankshaft balancer key.