Harmonic Balancer Replacement








I can also pull the engine in a little under 5 hours and swap the torque converter in about 4, but I'm guessing you probably don't believe me about those either, huh?
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Here are the steps in case anybody was curious:
- jack up the car and remove the front wheels
- remove the two 13mm lower shock bolts on both sides
- remove the four 15mm upper control arm bolts on both sides
- remove the 11mm bolt holding the steering shaft to the steering box
- support the engine either from up top with an engine hoist connected to the heads or with a floor jack down below with a block of wood under the oil pan
- remove the two 18mm nuts at the bottom of the engine mounts
- position a transmission jack under the front cradle
- remove the four 21mm bolts holding the cradle to the frame
- slowly lower the cradle all the way to the ground, adjusting the angle of the jack as necessary to make sure it comes down smoothly without binding up anywhere
At this point the balancer will be staring you in the face but in order to get it off you'll need to lock it somehow. I use the flywheel locking tool shown below. Alternatively, if the car has a manual transmission you can put it in 5th gear and have somebody apply the brakes and parking brake while you attempt to loosen the bolt. Something I don't recommend (although I've done it once before) is placing a large prybar in the teeth of the flywheel to keep it from moving.
After the bolt is out you'll need a balancer puller tool to get it off the crank. I use the same one that the dealership uses as the three arms sit in the slots of the pulley without slipping off. I've had mixed results with the ones you can borrow or rent from parts stores.
If you don't anticipate having to replace it again anytime soon then a stock balancer bolt is fine, otherwise an ARP bolt works well and is reusable.
A lot of people don't like the stock balancer but honestly I've had less trouble with those compared to the crappy ATI one that I have to run due to NHRA rules for my car. On three separate occasions several of the Torx bolts holding the two halves of the balancer together have sheared off.
To install the new balancer you'll need an installation tool to get it on since the new bolt isn't quite long enough. For that I just went to Fastenal and bought a threaded rod (can't remember the thread pitch) along with a couple of large nuts and washers and cut it down to the length I needed.
Here are the steps in case anybody was curious:
- jack up the car and remove the front wheels
- remove the two 13mm lower shock bolts on both sides
- remove the four 15mm upper control arm bolts on both sides
- remove the 11mm bolt holding the steering shaft to the steering box
- support the engine either from up top with an engine hoist connected to the heads or with a floor jack down below with a block of wood under the oil pan
- remove the two 18mm nuts at the bottom of the engine mounts
- position a transmission jack under the front cradle
- remove the four 21mm bolts holding the cradle to the frame
- slowly lower the cradle all the way to the ground, adjusting the angle of the jack as necessary to make sure it comes down smoothly without binding up anywhere
At this point the balancer will be staring you in the face but in order to get it off you'll need to lock it somehow. I use the flywheel locking tool shown below. Alternatively, if the car has a manual transmission you can put it in 5th gear and have somebody apply the brakes and parking brake while you attempt to loosen the bolt. Something I don't recommend (although I've done it once before) is placing a large prybar in the teeth of the flywheel to keep it from moving.
After the bolt is out you'll need a balancer puller tool to get it off the crank. I use the same one that the dealership uses as the three arms sit in the slots of the pulley without slipping off. I've had mixed results with the ones you can borrow or rent from parts stores.
If you don't anticipate having to replace it again anytime soon then a stock balancer bolt is fine, otherwise an ARP bolt works well and is reusable.
A lot of people don't like the stock balancer but honestly I've had less trouble with those compared to the crappy ATI one that I have to run due to NHRA rules for my car. On three separate occasions several of the Torx bolts holding the two halves of the balancer together have sheared off.
To install the new balancer you'll need an installation tool to get it on since the new bolt isn't quite long enough. For that I just went to Fastenal and bought a threaded rod (can't remember the thread pitch) along with a couple of large nuts and washers and cut it down to the length I needed.
The original quote is high IMO but not totally insane.




The original quote is high IMO but not totally insane.




the time estimates are pretty spot on... after pulling and reinstalling the motor in my z06, I could probably get pretty close to what he's saying.....
just look at the kids who can do a Rubik's cube in like seven seconds... it's just a matter of knowing what needs to be done

and
Last edited by drewz06; Feb 23, 2021 at 07:05 PM.



















