harmonic balancer procedure
See if any of this helps you:
BALANCER SWAP:
Need: balancer, seal (12585673, 296-02, nat/timken 100470 $11), PS fluid,
flexplate lock tool, balancer installer (16mm stud $15 eBay), LOANER: Advance Auto balancer kit (has Chrysler puller and installer with bearing and crank point protector)
new crank bolt, new tensioners, new belts, LOANER: 250LB torque wrench. Google "A&A supercharger instructions" for pics.
disconnect battery, remove sway bar, remove tie rods (jack under for pressure if shafts turn), remove starter (loosen cat or manifold to get to drop out, install flexplate lock
maybe lower cradle about 1/2" to help get lines loose (4 bolts), but may not need to if only pushing rack over partially, scribe balancer location
remove abs bracket bolts ( and other two if needed...dont lose and notice ther are "flats" on bolts for reassembly) and push out of way to get to 2 18mm lines, zip tie baggies to hold fluid,
CAREFUL unplugging rack connector, remove bolt on steering gear and remove from rack (11mm?), pry rack from mounts (notice washer sequence), roll rack out to passenger side enough to get to balancer
maybe slightly spread frame brackets with bolts and washers for easier reassembly (CAREFUL - ALUMINUM),
heat or torch to break RTV from crank bolt. Loosen with long cheater bar, Chrysler puller protecting end of crank, replace seal
boil crank 20 min and quickly put on with threaded installer, tighten with old bolt 240 LB then new bolt. Grease bolts and washers on install
sequence rack washers with grease on reinstall into frame brackets, use pin punch to line it all up, CAREFUL with rack plug-tiny pins
BOLT TIGHTENING: tighten to 240LB with old bolt, threadlocker (272 Locktite?)on new bolt and tighten to 37Ft LB, mark bolt 12 oclock to 6 ocllock with line.
tighten bolt second time to get 140 degree angle, RESEARCH IT.
someones writeup:
Having owned my 2005 C6 (with 54,500 miles) since last November I have been watching the HB with a slight wobble. No chirping of the belts (or anything else), but I decided to replace it before it got worse. Tackled it Sunday for a few hours and finished it Monday afternoon. Using a friends lift made it much easier too.
Special tools
Flywheel locking tool (for A4 auto)
Chrysler HB puller from AutoZone
LS2 HB install tool
Parts
Powerbond HB (my choice)
ARP HB Bolt
Front crank seal
Catayltic converter flange seal
Exhaust pipe donut seal
New Accessory drive & AC belts
First remove the passenger side catalytic converter & remove starter, install flywheel locking tool (you will need this to torque the HB bolt).
Pull the wheels, disconnect intermediate steering shaft, disconnect fluid lines to steering gear, remove accessory & AC drive belts, disconnect tie rods from steering knuckles, remove bolts to ABS module and push module up, remove driver's side brake line bracket and move aside, remove bolts from plastic brackets on front transmission lines (mine does not have a tranny cooler), remove front engine cradle nuts and loosen rear nuts, pry front of engine cradle down about 1" and insert a shim to keep it in place, remove 2 steering rack bolts, work the steering rack out the driver's side gently pushing brake lines out of the way (it is very close but will come out), remove HB with Chrysler puller (it is very heavy duty and low profile), remove front crankshaft seal & tap new seal in place, mount new HB and pull in place with the installation tool, lubricate & install new ARP bolt & torque to 230 lb. ft.
Note: I do not recommend using the original bolt to pull the new HB in place as there are not enough threads to keep from damaging the crankshaft threads.
Reverse the process and reinstall everything and you are good to go.
At first I was very intimidated and did not want to do it. Overall it is pretty easy and well worth the time to save $1,000 at the GM dealer. Total time for the job was about 5 hours.
Last edited by C6ToGo; Jul 11, 2016 at 07:51 AM.
The last manual I did, I accessed the flywheel from the left side by removing the plastic inspection cover (by the oil filter. I fashioned a home made flywheel lock which saved all the time spent removing the starter, etc.
The Best of Corvette for Corvette Enthusiasts
Last edited by Malfeitor; Mar 31, 2017 at 11:06 AM. Reason: typo..
The last manual I did, I accessed the flywheel from the left side by removing the plastic inspection cover (by the oil filter. I fashioned a home made flywheel lock which saved all the time spent removing the starter, etc.
See #9 above. I even include a pic in case you don't feel like reading.
Simply wrap the old serpentine carefully around crank pulley keeping it double, uncut, feed the loose end down through the cross member and put a big screw driver or bar through it to secure it from being drawn up on the pulley. My first try it took two swings of the ratchet on the crank bolt to snug the belt and two good pulls on 4' cheater and the bolt was loose. Once the slack was out there was no discernible movement on the HB. Took all of 5 minutes from start to bolt on the bench. Saved a trip to town and the cost of GM locking tool not to mention the R&R of the starter and possibly some exhaust. I will simply reverse the wrap when it's time to torque the bolt to spec. Worked so well I'm surprised I only saw this mentioned one time in a lot of reading.
I also found that the few minutes to remove the fan and shroud gave me a lot more room to R&R and pin the pulley.
YMMV
Any thoughts on the life span of the idlers and tension pulleys?
Thanks for all the great info.
Thoughts?
HB Installatin
And this is the tool I used to lock the flywheel.
Flywheel lock tool
Roy
1: Look online for guides and how to do it.
2: Jacked the car up.
3: Looked at everything from under the car.
4: Called and made an appointment with my mechanic.
5: Lowered the car back down and drove it to his shop.
That's the way I'll do it except I will go straight to the last part of step 5!
Last edited by Vet Interested; Apr 6, 2017 at 02:20 PM.
I've never heard of a positive experience doing a HB, always drama& smashed fingers & skinned knuckles. Sounded like a real PITA.
I commend anyone who does this job, themselves.
But IMO this is one job well worth whatever a qualified wrench charges, too.






















