How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask ase_master327 Your Own Question
ase_master327, Shop Owner
Category: Chevy
Satisfied Customers: 5288
Experience:  +15 years experience with Chevrolet. Bumper to bumper diagnosis & repair.
Type Your Chevy Question Here...
ase_master327 is online now
A new question is answered every 9 seconds

how do i replace my harmonic balancer on a 99 chevy lumina

Customer Question

No Comment Added
Submitted: 8 years ago.
Category: Chevy
Expert:  ase_master327 replied 8 years ago.

Hello, and thank you for choosing Just Answer!

Here are the instructions you asked for:


3.1L Engines

WARNING The inertial weight section of the crankshaft balancer (also called a Crankshaft Damper, or Torsional Damper) is assembled to the hub with a rubber type material. The correct installation procedures, with the proper tools, must be followed or movement of the inertial weight section of the hub will destroy the tuning of the crankshaft balancer.

  1. Remove the drive belt. Please see .
  2. Raise and safely support the vehicle.
  3. Remove the right front tire assembly. Locate and remove the right splash shield.
  4. On the 3.4L (VIN X) engine, remove the three bolts holding the crankshaft pulley and remove the pulley.
  5. Remove the crankshaft balancer bolt and washer.
  6. Remove the crankshaft balancer using a three-leg puller such as J 24420-B, or equivalent.

Crankshaft balancer removal-3.1L engine

To install:

  1. Clean all parts well. Apply a thin coat of sealer GM #12345739, or equivalent, to the keyway of the balancer. This is to help prevent oil from wicking along the keyway and causing a leak.
  2. Install the crankshaft balancer using tool J 29113 Crankshaft Balancer Installer or equivalent, to draw the balancer onto the crankshaft. Do not hammer on the balancer.
  3. Install the crankshaft bolt and washer and torque to 76-80 ft. lbs. (103-108 Nm).
  4. Install the remainder of the components in the reverse order of removal.