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Where Does The Weight Go On Flywheel BPP140969987?

Proper installation of the flywheel balance weight is critical for engine balance and smooth operation. Installing the weight in the incorrect location can result in engine vibration and potential drivetrain issues.

 Applicable Flywheel

BPP140969987

This flywheel is used on:

  • 1991 and later Big Block Chevy applications
  • Gen V Big Block Chevy engines
  • Gen VI Big Block Chevy engines
  • 1-Piece Rear Main Seal Big Block Chevy engines
Weight Installation Location

When viewing the flywheel with the weight mounting holes positioned at the 12 o'clock position, the balance weight should be installed using the two holes on the right side.

The image below illustrates the correct mounting location.

BPP140969987 weight location

 

Installation Notes
  • Verify the flywheel part number before installation.
  • Install the balance weight using the correct mounting holes.
  • Torque mounting hardware according to the flywheel manufacturer's specifications.
  • Do not relocate the weight to alternate holes.
  • Verify proper flywheel orientation before installation.
Why Is The Weight Location Important?

The balance weight is designed to match the external balance requirements of the engine.

Installing the weight in the wrong location can cause:

  • Engine vibration
  • Drivetrain vibration
  • Premature component wear
  • Improper engine balance
Frequently Asked Questions

Which Big Block Chevy engines use BPP140969987?

This flywheel corresponds to most 1991-up Gen V and Gen VI Big Block Chevy engines with a 1-piece rear main seal.

Which mounting holes should be used?

With the flywheel mounting holes positioned at the 12 o'clock position, install the weight using the two holes on the right side.

Can the weight be installed in a different set of holes?

No. The weight should only be installed in the specified mounting location.

What happens if the weight is installed incorrectly?

Incorrect installation can create engine balance issues and excessive vibration.