|A standard 350 CI harmonic Balancer|
|The offending brute!|
|The back side of my 400 CI crankshaft balancer|
|An example of a bad worn out outer harmonic cushion|
- Disconnect the battery
- Remove the accessory drive belts that go to the crank pulley, such as power steering, alternator, cooling fan and A/C
- If equipped, remove the balance's single retaining bolt
- Remove the three bolts that hold the crank pulley onto the balancer
- Remove the crank pulley
- Put together the harmonic balancer puller. The puller looks like a irregular triangle with a large
- Bolt the puller on the balancer with bolts that held the crank pulley to the balancer.. Don't use a pry bar. Old Pontiac's were done that way but most balancers if you use a crow bar you will more than likely will damage the outer rubber cushion
- Holding the big center bolt of the puller, insert and hand tighten the bolt until there is pressure on the three bolts
- Turn the big bolt in a clockwise direction to exert force to pull the balancer off of the crankshaft. Do not use a gear or pulley puller, again damage will occur to the outer balancer cushion.
- If your balancer will not come off, do not heat it up with a torch. Heat will harm the crank sea
Balancer puller kit
- Be mindful when the balancer is about to come off, so you do not drop it on your big toe.
- Your next step is to buy the correct balancer for your car if you are indeed replacing the balancer. If you have an older car and can not find a replacement you can have the balancer rebuilt. Link to recommended balancer store Damper Doctor
- Lubricate the threads of the installation tool or better yet use anti-seize compound.
- Find the correct thread size bolt, then insert it in the end of the crankshaft's threaded hole, the tool rental kit will have all different inserts, both metric and SAE. You really don't want to use the wrong thread size and strip the internal threads. You will have to use up to 120 pounds of torque to pull the balancer on the engine. That much force will easily strip the threads if you are not careful. Back in the day we just used a bolt and pulled the balancer on the crank. However, you have to have at least ½ inch of the threads in use or the force of the installation may strip the threads out of, God forbid, the inside of the threaded crank bolt hole.
- Carefully, attach the balancer on the end of the crank, insure that balancer is put on square to
- The balancer kit I used had a 1 ¼ inch nut on a bearing that was used to, I say push, but the correct way is to say say it is pull on the balancer on the shaft.
- Put on the 1 ¼ inch nut and bearing, with the bearing being on the engine side
- Back off the 1 ¼ inch nut on its threaded bolt.
- Screw in the correct size threaded insert into the end of the big bolt, remember to lubricate the internal crank bolt
- Using the hexagon shaped head of the bolt, insert, then turn the bolt turning the insert into the crankshaft bolt hole as far as it will go, (must use ½ inch of the threads) do not force it, if there is a tight spot, remove the tool and fix the problem
- Tighten the 1 ¼ inch nut down by hand against the bearing and the balancer
- With a wrench pull/push the balancer onto the crankshaft using the 1 ¼ inch nut.
- The torque setting is 120 pounds
- Some people recommend that you install a harmonic balancer retaining bolt and washer, in most cases it is not required but check to be sure!
- Put all the belts and pulleys back on, belts, check for belt alignment, tighten accessories
- Hook up the battery.
- Spin the fan by hand to check if it hits, I left a wrench at the bottom of the air shroud once and the fan under engine power hit the protruding wrench to take a chunk out of the fan.
- Double check to see if you have tightened everything down
- Turn the engine over and if everything sounds alright let her rip