Crankshaft Balancer Installation

WARNING: This page is about a different car, the 2019 GMC Savana 3500, 2019 GMC Savana 2500, 2019 Chevrolet Express 3500, and 2019 Chevrolet Express 2500. However, it is still accessible from the selected car via links, so may be relevant.

Courtesy of GENERAL MOTORS COMPANY

Callout	Component Name
1	Crankshaft Balancer CAUTION: Refer to Fastener Caution . NOTE: Ensure the teeth of the tool engage the engine flywheel teeth. The used crankshaft balancer bolt is used only during the installation procedure. Install a NEW crankshaft balancer bolt during final assembly. Procedure Install the EN-42386-A flywheel holding tool. Use 1 M10 - 1.5 x 120 mm and 1 M10 - 1.5 x 45 mm bolt for proper tool operation and tighten bolts to 50 N.m (37 lb ft). Assemble the EN-41478 installer threaded rod, nut, washer and the EN-41665 installer. Insert the smaller end of the installer into the front of the balancer. Use a wrench and hold the hex end of the threaded rod. Use a second wrench and rotate the installation tool nut clockwise until the balancer is started onto the crankshaft. Remove the tool and reverse the installation tool. Position the larger end of the installer against the front of the balancer. Use wrench and hold the hex end of the threaded rod. Use a second wrench and rotate the nut clockwise until the balancer is installed onto the crankshaft. Remove the balancer installation tools. Special Tools EN-41478 Crankshaft Front Oil Seal Installer EN-41665 Crankshaft Balancer and Sprocket Installer EN-42386-A Flywheel Holding Tool For equivalent regional tools, refer to Special Tools .
2	Crankshaft Balancer Bolt CAUTION: This vehicle is equipped with torque-to-yield or single use fasteners. Install a NEW torque-to-yield or single use fastener when installing this component. Failure to replace the torque-to-yield or single use fastener could cause damage to the vehicle or component. NOTE: The nose of the crankshaft (a) should be recessed 2.40 - 4.48 mm (0.094 - 0.176 in) into the balancer bore. Procedure Install the used crankshaft balancer bolt and tighten to 330 N.m (240 lb ft) to fully seat the balancer. Remove the used crankshaft balancer bolt. Measure for correctly installed balancer. If the balancer is not installed to proper dimensions, install the EN-41665 installer and repeat the installation procedure. Install the NEW crankshaft balancer bolt: Tighten the crankshaft balancer bolt to 150 N.m (110 lb ft). Loosen the crankshaft balancer bolt 360 degrees. Tighten the crankshaft balance bolt to 80 N.m (59 lb ft). Tighten the crankshaft balancer bolt a final pass to: Balancer bolt with flanged head tighten to 125 degrees using the EN-45059 angle meter. Balancer bolt with retained rotating washer tighten to 200 degrees using the EN-45059 angle meter. Remove the EN-42386-A flywheel holding tool. Special Tools EN-41665 Crankshaft Balancer and Sprocket Installer EN-42386-A Flywheel Holding Tool EN-45059 Angle Meter For equivalent regional tools, refer to Special Tools .

Callout

Component Name

Crankshaft Balancer

CAUTION:

Refer to Fastener Caution .

NOTE:

Ensure the teeth of the tool engage the engine flywheel teeth.
The used crankshaft balancer bolt is used only during the installation procedure. Install a NEW crankshaft balancer bolt during final assembly.

Procedure

Install the EN-42386-A flywheel holding tool. Use 1 M10 - 1.5 x 120 mm and 1 M10 - 1.5 x 45 mm bolt for proper tool operation and tighten bolts to 50 N.m (37 lb ft).
Assemble the EN-41478 installer threaded rod, nut, washer and the EN-41665 installer.
Insert the smaller end of the installer into the front of the balancer. Use a wrench and hold the hex end of the threaded rod. Use a second wrench and rotate the installation tool nut clockwise until the balancer is started onto the crankshaft.
Remove the tool and reverse the installation tool. Position the larger end of the installer against the front of the balancer. Use wrench and hold the hex end of the threaded rod. Use a second wrench and rotate the nut clockwise until the balancer is installed onto the crankshaft.
Remove the balancer installation tools.

Special Tools

EN-41478 Crankshaft Front Oil Seal Installer
EN-41665 Crankshaft Balancer and Sprocket Installer
EN-42386-A Flywheel Holding Tool

For equivalent regional tools, refer to Special Tools .

Crankshaft Balancer Bolt

CAUTION:

This vehicle is equipped with torque-to-yield or single use fasteners. Install a NEW torque-to-yield or single use fastener when installing this component. Failure to replace the torque-to-yield or single use fastener could cause damage to the vehicle or component.

NOTE:

The nose of the crankshaft (a) should be recessed 2.40 - 4.48 mm (0.094 - 0.176 in) into the balancer bore.

Procedure

Install the used crankshaft balancer bolt and tighten to 330 N.m (240 lb ft) to fully seat the balancer.
Remove the used crankshaft balancer bolt.
Measure for correctly installed balancer. If the balancer is not installed to proper dimensions, install the EN-41665 installer and repeat the installation procedure.
Install the NEW crankshaft balancer bolt:
1. Tighten the crankshaft balancer bolt to 150 N.m (110 lb ft).
2. Loosen the crankshaft balancer bolt 360 degrees.
3. Tighten the crankshaft balance bolt to 80 N.m (59 lb ft).
4. Tighten the crankshaft balancer bolt a final pass to:
  - Balancer bolt with flanged head tighten to 125 degrees using the EN-45059 angle meter.
  - Balancer bolt with retained rotating washer tighten to 200 degrees using the EN-45059 angle meter.
Remove the EN-42386-A flywheel holding tool.

Special Tools

EN-41665 Crankshaft Balancer and Sprocket Installer
EN-42386-A Flywheel Holding Tool
EN-45059 Angle Meter

For equivalent regional tools, refer to Special Tools .