Timing Belt Installation

Special Tools

• EN-6333  Locking Pin
• EN-6340  Locking Tool

For equivalent regional tools, refer to Special Tools .

Fig 1: Aligning Timing Belt Drive Gear And Oil Pump Housing
Courtesy of GENERAL MOTORS COMPANY
NOTE:

The timing belt drive gear and oil pump housing must align.

1. Turn the crankshaft in the direction of engine rotation, by the crankshaft balancer bolt, to cylinder 1 TDC of combustion stroke.
Fig 2: Front Panel And Bolts
Courtesy of GENERAL MOTORS COMPANY
NOTE:

The right half of the EN-6340  locking tool can be recognized by the lettering right, arrow, on the tool.

2. Prepare the right half of the EN-6340  locking tool.
   1. Remove the 2 bolts (2).
   2. Detach the front panel (1) from the EN-6340  locking tool - right.
Fig 3: Spot Type Markings And Special Tool
Courtesy of GENERAL MOTORS COMPANY
NOTE:
• The spot type marking (4) on the intake camshaft adjuster does not correspond to the groove of the EN-6340  locking tool - left (1) during this process, but must be somewhat above.
• The spot type marking (3) on the exhaust camshaft adjuster must correspond to the groove on EN-6340  locking tool - right (2).
3. Insert the EN-6340  locking tool - left (1) and the EN-6340  locking tool - right (2) in the camshaft adjuster.
Fig 4: Timing Belt, Timing Belt Tensioner
Courtesy of GENERAL MOTORS COMPANY
NOTE:

Observe direction of rotation.

4. Insert the timing belt (1).
Fig 5: View Of Drive Belt Tensioner, Allen Key And KM-6333
Courtesy of GENERAL MOTORS COMPANY
5. Apply tension to the timing belt tensioner (2) in the direction of the arrow, using an Allen key (1).
6. Remove the EN-6333  locking pin (3).
NOTE:

The timing belt tensioner moves automatically to the correct position.

7. Release tension on timing belt tensioner.
8. Remove the EN-6340  locking tool.
9. Check position of the camshaft sprocket.
   1. Turn crankshaft 720° in the direction of engine rotation by the crankshaft balancer bolt.
   NOTE:

   Note the marking on the camshaft sprocket.

   2. Insert EN-6340  locking tool into camshaft sprockets.
Fig 6: Aligning Timing Belt Drive Gear And Oil Pump Housing
Courtesy of GENERAL MOTORS COMPANY
NOTE:

The timing belt drive gear and oil pump housing must align.

10. Check the crankshaft position.