Crankshaft Balancer Installation 6.2L LS3

Special Tools

For equivalent regional tools, refer to Special Tools

Caution: Refer to Fastener Caution in the Preface section.





Note: 

•

For manual transmission applications, note the position of the crankshaft balancer before removal. The balancer does not use a key or keyway for positioning. Mark or scribe the end of the crankshaft and the balancer before removal. The crankshaft balancer must be installed to the original position. If replacing the crankshaft balancer, note the location of any existing balance weights, if applicable. Install new balance weights into the new crankshaft balancer, if applicable. Crankshaft balance weights must be installed into the new balancer in the same location as the old balancer. A properly installed balance weight will be either flush or below flush with the face of the balancer.

•	The crankshaft balancer installation and bolt tightening involves a 4 stage tightening process. The first pass ensures that the balancer is installed completely onto the crankshaft. The second, third and fourth passes tighten the NEW bolt to the proper torque.

1. Install the J 42386-A holding tool 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 holding tool bolts to 50 N·m (37 lb ft).




2. Using the old balancer as a reference, mark or scribe the new balancer in the same location, if applicable.
3. Install balance weights into the new balancer, if applicable. Refer to Engine Balancing and Crankshaft Balancer Cleaning and Inspection.



4. Install the crankshaft balancer washer (1) onto the crankshaft balancer.




Note: The balancer should be positioned onto the end of the crankshaft as straight as possible prior to tool installation.

5. Position the balancer (1) onto the end of the crankshaft.



6. Use the J 41665 installer and the J 41478 installer in order to install the balancer.

6.1.	Assemble the J 41478 installer threaded rod, nut, washer, and the J 41665 installer installer.

Insert the smaller end of the installer into the front of the balancer.

6.2.	Use a wrench and hold the hex end of the threaded rod.

6.3.	Use a second wrench and rotate the installation tool nut clockwise until the balancer is started onto the crankshaft.

6.4.	Remove the tool and reverse the installation tool.

Position the larger end of the installer against the front of the balancer.

6.5.	Use a wrench and hold the hex end of the threaded rod.

6.6.	Use a second wrench and rotate the installation tool nut clockwise until the balancer is installed onto the crankshaft.

6.7.	Remove the balancer installation tools.




7. Install the NEW crankshaft balancer bolt (139):

7.1.	Tighten the crankshaft balancer bolt a first pass to 150 N·m (110 lb ft).

7.2.	Loosen the crankshaft balancer bolt a second pass 360 degrees.

7.3.	Tighten the crankshaft balancer bolt a third pass to 50 N·m (37 lb ft).

7.4.	Tighten the crankshaft balancer bolt a final pass to 230 degrees using the J 45059 meter .

8. Remove the J 42386-A holding tool .

Crankshaft Balancer Installation 6.2L LS9

Special Tools

For equivalent regional tools, refer to Special Tools

Caution: Refer to Fastener Caution in the Preface section.





Note: 

•

If replacing the crankshaft balancer, note the location of any existing balance weights, if applicable. Install new balance weights into the new crankshaft balancer, if applicable. Crankshaft balance weights must be installed into the new balancer in the same location as the old balancer. A properly installed balance weight will be either flush or below flush with the face of the balancer. Refer to Engine Balancing and Crankshaft Balancer Cleaning and Inspection.

•	The crankshaft balancer installation and bolt tightening involves a 4 step tightening process. The first pass ensures that the balancer is installed completely onto the crankshaft. The second, third and fourth passes tighten the NEW bolt to the proper torque.

1. Install the J 42386-A holding tool and bolts.

Use 1 M10 - 1.5 x 120 mm and 1 M10 - 1.5 x 45 mm bolt for proper tool operation and tighten the J 42386-A holding tool bolts to 50 N·m (37 lb ft).




2. Using the old balancer as a reference, mark or scribe the new balancer in the same location, if applicable. Refer to Crankshaft Balancer Cleaning and Inspection.
3. Install balance weights into the new balancer, if applicable.



4. Install the crankshaft balancer washer (1) onto the crankshaft balancer.




Note: The balancer should be positioned onto the end of the crankshaft as straight as possible prior to tool installation.

5. Position the balancer (138) onto the end of the crankshaft.



6. Use the J 41665-A installer  (2) and the EN-47812 installer bolt  (1) in order to install the balancer.

6.1.	Assemble the EN-47812 installer bolt  (1), nut, washer and the J 41665-A installer  (2).

Insert the smaller end of the J 41665-A installer  (2) into the front of the balancer.

6.2.	Use a wrench and hold the hex end of the EN-47812 installer bolt  (1).

6.3.	Use a second wrench and rotate the installation tool nut clockwise until the balancer is started onto the crankshaft.

6.4.	Remove the J 41665-A installer  (2) and reverse the installation tool.

Position the larger end of the J 41665-A installer  (2) against the front of the balancer.

6.5.	Use a wrench and hold the end of the EN-47812 installer bolt  (1).

6.6.	Use a second wrench and rotate the installation tool nut clockwise until the balancer is installed onto the crankshaft.

6.7.	Remove the balancer installation tools.




7. Install the NEW crankshaft balancer bolt (139) and:

7.1.	Tighten the crankshaft balancer bolt a first pass to 150 N·m (110 lb ft).

7.2.	Loosen the crankshaft balancer bolt a second pass 360 degrees.

7.3.	Tighten the crankshaft balancer bolt a third pass to 50 N·m (37 lb ft).

7.4.	Tighten the crankshaft balancer bolt a final pass to 230 degrees using the J 45059 meter .

8. Remove the J 42386-A tool .