Timing Belt Removal

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

Special Tools

EN-955-A V-Belt and Timing Tensioner Locking Pin
EN-52457 Camshaft Locking Tool
EN-52458 VCP Locking Tool
EN-52476 Flywheel Locking Tool

Equivalent regional tools: Special Tools

Courtesy of GENERAL MOTORS COMPANY

NOTE:
Ensure the EN-52476 Flywheel Locking Tool (1) is properly assembled, and the timing pin plunger (3) is retracted. When using the EN-52476 Flywheel Locking Tool as an timing device, adjust the pawl armature (4) so the pawl is not engaging the teeth once installed.

EN-52476 locking tool (1) - Install
Bolt (2) - Install and tighten [2x]
Courtesy of GENERAL MOTORS COMPANY

Crankshaft Balancer Bolt (1) - Install

NOTE:

The engine timing is located 118.14 degrees after top dead center.

Engage the EN-52476 Flywheel Locking Tool timing pin plunger (2).

NOTE:

Once there is resistance, do NOT turn the crankshaft further.

Adjust the engine to the engine timing position. Use the crankshaft balancer bolt to slowly rotate the crankshaft in the direction of engine rotation until the pin (3) of the EN-52476 Flywheel Locking Tool snaps automatically into the hole (4) of the automatic transmission flex plate or the engine flywheel.
Adjust the pawl armature (5) on the EN-52476 Flywheel Locking Tool so the pawl is not engaging the teeth.
Courtesy of GENERAL MOTORS COMPANY

If the engine timing is adjusted correctly, the valves (1, 3) of the 3rd cylinder must be closed. Also the 2 flats (2) must stand in vertical position.
Courtesy of GENERAL MOTORS COMPANY

NOTE:
The EN-52457 Camshaft Locking Tool has an identification for which side it must be used. Place the EN-52457 Camshaft Locking Tool with the identification mark I (1) facing upwards. Also the surface has an identification for the intake (2).

EN-52457-2 Locking Tool - Intake (5) - Install
Bolt (3, 4) - Install and tighten
Courtesy of GENERAL MOTORS COMPANY

NOTE:
The EN-52457 Camshaft Locking Tool has an identification for which side it must be used. Place the EN-52457 Camshaft Locking Tool with the identification mark I (1) facing upwards. Also the surface has an identification for the exhaust (2).

EN-52457-2 Locking Tool - Exhaust (5) - Install
Bolt (3, 4) - Install and tighten [2x]
Courtesy of GENERAL MOTORS COMPANY

Bolt @ EN-52458 VCP Locking Tool (2) - Loosen
EN-52458 VCP Locking Tool (1) - Adjust
EN-52458 VCP Locking Tool (1) - Install

CAUTION:

Fastener Caution

Bolt (3) - Install and tighten [4x] 6 N.m (53 lb in)
Bolt (2) - Tighten
Courtesy of GENERAL MOTORS COMPANY

Loosen the timing belt tensioner bolt (2) and release the tension from the timing belt tensioner (1). Rotate the timing belt tensioner counter-clockwise.
EN-955-10-A locking pin (3) - Install
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Install the EN-52458-3 locking tool (2) to the holes in the camshaft sprocket.
Check that the EN-52458-3 locking tool (2) sits correctly in the hole of the camshaft sprocket.
Bolt (3, 4) - Tighten [2x] 20 N.m (15 lb ft)
Camshaft Sprocket Actuator Valve Bolt (1) - Loosen [2x]
Bolt (3, 4) - Loosen [2x]
Courtesy of GENERAL MOTORS COMPANY

Bolt (3) - Remove [4x]
EN-52458 locking tool (1) - Remove
Courtesy of GENERAL MOTORS COMPANY

Camshaft Sprocket Actuator Valve Bolt (1) - Remove and DISCARD [2x]
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Camshaft Sprocket (1) - Remove [2x]
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Timing Belt Tensioner Bolt (2) - Remove
Timing Belt Tensioner (1) - Remove
Timing Belt Idler Pulley Bolt (3) - Loosen
Timing Belt Idler Pulley (4) - Remove
Courtesy of GENERAL MOTORS COMPANY

Crankshaft Balancer Bolt (4) - Remove
Crankshaft Sprocket (3) - Remove
Crankshaft Front Seal (2) - Remove and DISCARD
Remove the timing belt (1) upwards.
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Bolt (3, 4) - Remove [2x]
EN-52457-2 Locking Tool - Exhaust (5) - Remove
Courtesy of GENERAL MOTORS COMPANY

Bolt (3, 4) - Remove
EN-52457-2 Locking Tool - Intake (5) - Remove
Courtesy of GENERAL MOTORS COMPANY

Bolt (2) - Remove [2x]
EN-52476 Flywheel Locking Tool (1) - Remove