Balance Shaft: Service and Repair

Balance Shaft Replacement


Special Tools
* J 8092 Universal Driver Handle
* J 36996 Balance Shaft Installer
* J 45059 Angle Meter



Removal Procedure





1. Remove the lifter pushrod guide. Refer to Valve Lifter Replacement (Service and Repair) .
2. Remove the timing chain and camshaft sprocket. Refer to Camshaft Timing Chain, Sprocket, and Tensioner Replacement (Service and Repair) .
3. Remove the balance shaft drive gear.




4. Remove the balance shaft driven gear bolt.

1. Use a wrench in order to secure the balance shaft.
Place the wrench onto the balance shaft near to the balance shaft front bearing.
2. Remove the balance shaft bolt.
3. Remove the wrench from the balance shaft.

5. Remove the balance shaft driven gear.




6. Remove the balance shaft retainer bolts and retainer.





Important: The balance shaft and the balance shaft front bearing are serviced only as a package. Do not remove the balance shaft front bearing from the balance shaft.


7. Use a soft-faced hammer in order to remove the balance shaft from the engine block.
8. Clean and inspect the balance shaft, if necessary. Refer to Balance Shaft Cleaning and Inspection () .



Installation Procedure

Important: The balance shaft drive and balance shaft driven gears are serviced as a set. The set includes the balance shaft driven gear bolt.







1. Apply clean engine oil to the balance shaft front bearing.
2. Using J 36996 and J 8092 , install the balance shaft.





Notice: Refer to Fastener Notice .

3. Install the balance shaft retainer and bolts.

Tighten the bolts to 12 N.m (106 lb in).





4. Install the balance shaft driven gear.
5. If reusing the fastener, apply threadlocker to the threads of the balance shaft driven gear bolt. Refer to Sealers, Adhesives, and Lubricants (Specifications) for the correct part number.
6. Install the balance shaft driven gear bolt.

1. Use a wrench to secure the balance shaft.
Place the wrench onto the balance shaft near to the balance shaft front bearing.
2. Install the balance shaft driven gear bolt.

1. Tighten the bolt a first pass to 20 N.m (15 lb ft).
2. Tighten the bolt a final pass an additional 35 degrees using J 45059 .



7. Remove the wrench from the balance shaft.
8. Rotate the balance shaft by hand in order to ensure that there is clearance between the balance shaft and the valve lifter pushrod guide. If the balance shaft does not rotate freely, check to ensure that the retaining ring on the balance shaft front bearing is seated on the case.




9. Install the balance shaft drive gear. DO NOT install the camshaft sprocket bolts at this time.




10. Rotate the camshaft so that the timing mark on the balance shaft drive gear is in the 12 o'clock position.




11. Remove the balance shaft drive gear.




12. Rotate the balance shaft so that the timing mark on the balance shaft driven gear is in the 6 o'clock position.




13. Position the balance shaft drive gear onto the engine camshaft.
14. Look to ensure that the balance shaft drive gear and the balance shaft driven gear timing marks are aligned.
15. Install the timing chain and the camshaft sprocket. Refer to Camshaft Timing Chain, Sprocket, and Tensioner Replacement (Service and Repair) .
16. Install the valve lifter pushrod guide. Refer to Valve Lifter Replacement (Service and Repair) .