Installation Procedure

WARNING: This page is about a different variant/trim than selected.

Set the fuel injection pump driven sprocket to position as shown in the picture. Fix the fuel injection pump driven sprocket.

Fig 1: Rotating Engine Until It Is Possible To Install Bolts
Courtesy of GENERAL MOTORS COMPANY
NOTE:
- To decide if the timing belt can be reused or not, refer to Timing Belt Removal .
- Avoid the contact with cooling fluid and oil, it will damage the timing belt and can not be reused.
- When affixing the pulley, use two hex socket head bolts M6 x 40 (30 mm unthread and 10 mm thread). The bolt must be tightened the whole length of the thread. This way the pulley is prevented from moving out of position.
Lock the crankshaft, using the EN-46788 fixing tool (1).

Fig 2: Identifying EN-46788 Fixing Tool
Courtesy of GENERAL MOTORS COMPANY
NOTE:
- Do not damage the timing belt. A damaged timing belt can not be reused.
- Observe direction of timing belt rotation.
1. Install the timing belt to the crankshaft sprocket.
2. Install the EN-46788 fixing tool (1).
  NOTE: Ensure that the timing belt does not fall of the sprocket during the installation procedure.
Install the timing belt in the following sequence:

Fig 3: Timing Belt Routing
Courtesy of GENERAL MOTORS COMPANY
NOTE:
- The marks on the timing belt must fit to the marks on the sprockets, see arrows in graphic.
- The timing belt tensioner must be loose.
1. Start with the crankshaft sprocket (4).
2. Second the timing belt tensioner (5).
3. Third the water pump (6).
4. Fourth the high pressure pump sprocket (1).
5. Fifth the camshaft sprocket (2).
6. The last one is the belt idler pulley (3).
Bring the tensioner (1) in nominal tension.

Fig 4: Tensioner
Courtesy of GENERAL MOTORS COMPANY
1. Loosen the tensioner bolt.
2. Bring the mobile index to the reference position (bore), see at arrows in picture, use a suitable tool (2).
Tighten the tensioner bolt (1) to 15 N.m (11 lb ft).
CAUTION: Refer to Fastener Caution .

NOTE: The torque is not the final torque.
Fasten the camshaft sprocket bolt.

Fig 5: Identifying Camshaft Sprocket, EN-47634 Holding Tool And EN-956-1 Extension
Courtesy of GENERAL MOTORS COMPANY

NOTE: The torque is not the final torque.
1. Install the EN-47634 holding tool (2) to the camshaft sprocket (1).
2. Hold up with the EN-956-1 extension (3) and loosen the camshaft sprocket bolt to 50 N.m (37 lb ft).
Remove the EN-47634 holding tool and the EN-956-1 extension.
Remove the EN-46788 fixing tool (1).

Fig 6: Identifying EN-46788 Fixing Tool
Courtesy of GENERAL MOTORS COMPANY
Remove the EN-46789 locking tool (1).

Fig 7: Identifying EN-46789 Locking Tool
Courtesy of GENERAL MOTORS COMPANY
Remove the 2 fixing bolts from the fuel injection pump driven sprocket.
Rotate the engine 720 degrees.
Check tensioner tension and repeat the tension procedure if necessary.

Fig 8: Identifying Mobile Index
Courtesy of GENERAL MOTORS COMPANY

The correct position of the mobile index (1) for a used timing belt is in the section (2) between the nominal and the self made mark.
Bring the timing belt tensioner bolt to its final torque. Tighten the tensioner bolt to 25 N.m (18 lb ft).
Rotate the engine 720 degrees.
NOTE: It is absolutely necessary to turn the engine clockwise, not in another direction.
Check the engine timing.
1. Install the EN-46789 locking tool (1).
  
  Fig 9: Identifying EN-46789 Locking Tool
  Courtesy of GENERAL MOTORS COMPANY
2. Install the EN-46788 fixing tool (1).
  
  Fig 10: Identifying EN-46788 Fixing Tool
  Courtesy of GENERAL MOTORS COMPANY
Check tensioner tension and repeat the tension procedure if necessary.
Bring the camshaft sprocket bolt to its final torque.

Fig 11: Identifying Camshaft Sprocket, EN-47634 Holding Tool And EN-956-1 Extension
Courtesy of GENERAL MOTORS COMPANY
1. Install the EN-47634 holding tool (2) to the camshaft sprocket (1).
2. Hold up with the EN-956-1 extension (3) and loosen the camshaft sprocket bolt to 130 N.m (96 lb ft).
Remove the EN-47634 holding tool and the EN-956-1 extension.
Remove the EN-46789 locking tool and the EN-46788 fixing tool.
Install the oil pump bolt (1) and tighten to 9 N.m (80 lb in).

Fig 12: Oil Pump Bolt
Courtesy of GENERAL MOTORS COMPANY
Install the camshaft housing closure bolt on the exhaust camshaft side.
Engine Mount Bracket Replacement »Install
Front Wheelhouse Liner Replacement Install
Lower the vehicle.
Engine Sight Shield Replacement Install
Battery Negative Cable Disconnection and Connection »Connect
Remove the covers from the fender.