The 1997-2004 5.7L LS1/LS6 engine with crankshaft balancer is
a balanced assembly. On manual transmission applications, the flywheel,
clutch, and pressure plate is also a balanced assembly. During the powertrain
build process, balance weights may be added to the crankshaft balancer and/or
flywheel as required.
In order to maintain engine/clutch assembly balance, it may be necessary
to install or remove balance weights as detailed below:
Crankshaft Balancer
| • | Existing balancer onto existing engine: |
| • | New balancer onto an existing engine: |
Engine Flywheel
Important: The flywheel, clutch, and pressure plate are a balanced assembly and
are not available as individual components. The pressure plate mounts or
locates onto the flywheel via two dowel pins in the flywheel. If the pressure
plate is not aligned properly onto the dowel pins and tightened down, the
pins may bend and the plate may be incorrectly positioned which will effect
component balance. Refer to
Clutch Assembly Replacement
.
| • | Existing flywheel, clutch, and pressure plate assembly onto the
existing engine: |
| | Flywheel position must be marked prior to removal
and installed to the original position. Refer to
Engine Flywheel Removal
. |
| • | Existing flywheel, clutch, and pressure plate onto a new engine: |
| | Remove balance weights, if applicable from the flywheel. |
| • | New flywheel, clutch, and pressure plate assembly onto an existing
engine: |
| | Do not transfer or install balance weights. |
| • | New flywheel, clutch, and pressure plate assembly onto a new engine: |
| | Do not install balance weights. |
