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

For equivalent regional tools, refer to Special Tools .

Fig 1: Automatic Transmission Flex Plate
Courtesy of GENERAL MOTORS CORP.
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 CORP.
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 CORP.
3. Remove the CMP actuator solenoid valve (234).
4. Discard the solenoid valve.
Fig 4: Proper CMP Actuator Removal
Courtesy of GENERAL MOTORS CORP.
WARNING: Refer to Camshaft Position Actuator Removal and Installation Warning .
5. 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 & Timing Chain
Courtesy of GENERAL MOTORS CORP.
6. Remove the CMP actuator (235) and timing chain (208).
Fig 6: Tie Strap Through Center Of Actuator
Courtesy of GENERAL MOTORS CORP.
7. Insert a tie strap (1) through the center of the actuator and over the reluctor wheel.
Fig 7: Timing Chain Tensioner & Bolts
Courtesy of GENERAL MOTORS CORP.
8. Remove the bolts (231) and timing chain tensioner (232).
Fig 8: Removing Crankshaft Sprocket
Courtesy of GENERAL MOTORS CORP.
9. 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 CORP.
10. Remove the crankshaft sprocket (207).
Fig 10: Crankshaft Key & Keyway
Courtesy of GENERAL MOTORS CORP.
11. Remove the crankshaft sprocket key, as required.
12. Remove the flex plate and bolts. Refer to Automatic Transmission Flex Plate Removal .
13. Remove the J 42386-A:  tool and bolts.