Camshaft: Service and Repair

Camshaft Replacement (RPOs LC9, LMG, LY2, LY5)

Special Tools
* EN 46330 Timing Belt Tensioner Retaining Pin
* J 42386-A Flywheel Holding Tool
* J 45059 Angle Meter

Removal Procedure

Note: If camshaft replacement is required, the valve lifters must also be replaced.




1. Remove the radiator support. Refer to Radiator Support Replacement ().
2. Remove the valve lifters. Refer to Valve Lifter Replacement (Except RPOs LC9, LH6, LMG, LME, LY5) (Valve Lifter Replacement)Valve Lifter Replacement (RPOs LC9, LH9, LMG, LY5, L76) (Valve Lifter Replacement).
3. Remove the engine front cover. Refer to Engine Front Cover Replacement (Except RPOs LC9, LH6, LMG, LY2, LY5) (Service and Repair)Engine Front Cover Replacement (RPOs LC9, LH6, LMG, LY2 and LY5) (Service and Repair).
4. Remove the starter motor. Refer to Starter Replacement (Service and Repair).

Caution: Refer to Fastener Caution (Fastener Caution).

Note: Ensure that the teeth of the J 42386-A mesh with the teeth of the engine flywheel.

5. Install the J 42386-A (1) and bolts. Use one M10-1.5 x 120 mm and one M10-1.5 x 45 mm bolt for proper tool operation.

Tighten the J 42386-A bolts to 50 Nm (37 lb ft).




6. Rotate the crankshaft sprocket until the camshaft sprocket alignment mark (1) and the crankshaft sprocket alignment mark (2) are aligned.





Caution: Do not turn the crankshaft assembly after the timing chain has been removed in order to prevent damage to the piston assemblies or the valves.

7. Remove the camshaft sprocket bolt (206).
8. Remove the camshaft sprocket (205) and timing chain (208).




9. Remove the camshaft retainer bolts (204) and retainer (203).





Caution: All camshaft journals are the same diameter, so care must be used in removing or installing the camshaft to avoid damage to the camshaft bearings.

10. Install the camshaft sprocket bolt into the camshaft front bolt hole.
11. Using the bolt as a handle, carefully rotate and remove the camshaft from the engine block.
12. Remove the bolt from the camshaft.

Installation Procedure




1. Lubricate the camshaft journals and the bearings with clean engine oil.
2. Install the camshaft sprocket bolt into the camshaft front bolt hole.

Caution: All camshaft journals are the same diameter, so care must be used in removing or installing the camshaft to avoid damage to the camshaft bearings.

3. Using the bolt as a handle, carefully install the camshaft into the engine block.
4. Remove the bolt from the front of the camshaft.





Note: The gasket surface on the engine block should be clean and free of dirt and/or debris.

5. Install the camshaft retainer (203) and bolts (204). Install the retainer with the sealing gasket facing the engine block.




6. Tighten the camshaft retainer bolts.

* Tighten the first design hex head bolts (3) to 25 Nm(18 lb ft).
* Tighten the second design TORX(R)head bolts (4) to 15 Nm(11 lb ft).




7. Compress the timing chain tensioner guide and install the EN 46330 .




8. Align the camshaft sprocket so the timing mark is in the 6 o'clock position.
9. Install the camshaft sprocket (205), timing chain (208), and bolt (206).




10. Inspect the sprockets for proper alignment. The marks on the camshaft sprocket (1) should be located in the 6 o'clock position and the mark on the crankshaft sprocket (2) should be located in the 12 o'clock position.




11. Remove the EN 46330 .




12. Tighten the camshaft sprocket bolt.

1. Tighten the bolt a first pass to 90 Nm(66 lb ft).
2. Tighten the bolt a final pass to 40 degrees using J 45059 .




13. Remove the J 42386-A (1) and bolts.
14. Install the starter motor. Refer to Starter Replacement (Service and Repair).
15. Install the engine front cover. Refer to Engine Front Cover Replacement (Except RPOs LC9, LH6, LMG, LY2, LY5) (Service and Repair)Engine Front Cover Replacement (RPOs LC9, LH6, LMG, LY2 and LY5) (Service and Repair).
16. Install the valve lifters. Refer to Valve Lifter Replacement (Except RPOs LC9, LH6, LMG, LME, LY5) (Valve Lifter Replacement)Valve Lifter Replacement (RPOs LC9, LH9, LMG, LY5, L76) (Valve Lifter Replacement).
17. Install the radiator support. Refer to Radiator Support Replacement ().