Timing Chain, Crankshaft Sprocket, Camshaft Position Actuator, And Solenoid Valve Removal

Special Tools

• J-8433  Two Jaw Puller
• J-41558  Crankshaft Sprocket Remover
• J-41816-2  Crankshaft End Protector
• J-42386-A  Flywheel Holding Tool

Equivalent regional tools: Special Tools 

Fig 1: Flex Plate And Bolts
Courtesy of GENERAL MOTORS COMPANY
NOTE:
• Do not use the camshaft position (CMP) actuator solenoid valve again. Upon installation of the CMP actuator and timing chain, install a NEW valve.
• Do not apply threadlock to the flex plate bolts at this time.
1. Temporarily install the automatic transmission flex plate and bolts. Refer to Automatic Transmission Flex Plate Installation 
Fig 2: Flywheel Holding Tool
Courtesy of GENERAL MOTORS COMPANY
CAUTION:

Refer to Fastener Caution .

2. Install the J-42386-A  tool (1) and bolts. Use 1 M10 - 1.5 x 120 mm and 1 M10 - 1.5 x 45 mm bolt for proper tool operation. Tighten the J-42386-A  tool bolts to 50 N.m (37 lb ft).
Fig 3: CMP Actuator Solenoid Valve
Courtesy of GENERAL MOTORS COMPANY
3. Remove and DISCARD Camshaft Position Actuator Solenoid Valve (234).
Fig 4: Proper CMP Actuator Removal
Courtesy of GENERAL MOTORS COMPANY
WARNING:

Refer to Camshaft Position Actuator Removal and Installation Warning .

4. Loosen and separate the CMP actuator and timing chain from the camshaft. Position fingers behind the actuator sprocket and pull the actuator away from the front of the camshaft. Never pull on the reluctor wheel when attempting to remove the actuator.
Fig 5: CMP Actuator And Timing Chain
Courtesy of GENERAL MOTORS COMPANY
5. Remove the CMP actuator (235) and timing chain (208).
Fig 6: Tie Strap Through Center Of Actuator
Courtesy of GENERAL MOTORS COMPANY
6. Insert a tie strap (1) through the center of the actuator and over the reluctor wheel.
Fig 7: Timing Chain Tensioner And Bolts
Courtesy of GENERAL MOTORS COMPANY
7. Remove the bolts (231) and timing chain tensioner (232).
Fig 8: Removing Crankshaft Sprocket Using Special Tools
Courtesy of GENERAL MOTORS COMPANY
8. Use the J-41816-2  protector (1), the J-41558  remover (2), bolts (3), and the J-8433  puller (4) in order to remove the crankshaft sprocket.
Fig 9: Crankshaft Sprocket
Courtesy of GENERAL MOTORS COMPANY
9. Crankshaft Sprocket (207).
Fig 10: Crankshaft Sprocket Key And Keyway
Courtesy of GENERAL MOTORS COMPANY
10. Remove the crankshaft sprocket key, as required.
11. Remove the flex plate and bolts. Refer to Automatic Transmission Flex Plate Removal .
12. Remove J-42386-A  tool and bolts.