View source
for
Harmonic balancer/damper - How to remove and install
Jump to:
navigation
,
search
=Overview= The harmonic balancer or damper is usually a tight press-fit onto the end of the crankshaft. This is so the torsional vibrations of the crankshaft generated by the power pulses of the engine can be transmitted to- and absorbed or dissipated by- the harmonic balancer. If the fit isn't tight, the harmonic balancer will not be able to absorb the vibrations and in some cases this can lead to a failure of the key/keyway that locates the balancer and/or the fastener that secures it to the crankshaft along with the tight press-fit. =Tools= It is always advisable to use a dedicated tool for damper removal. To do otherwise risks damaging the damper beyond repair, damaging the crankshaft or other related parts and covers, or personal injury. Because of how tightly most dampers are pressed onto the crank, there's basically no way a damper could be pried off anyway. Heat cannot be used because there could be damage to the damper oil seal. Also most dampers have an elastomeric band that separated the inner hub from the outer inertia ring. Heat can ruin the bond between the two, causing catastrophic failure of the damper that could damage the radiator, water pump, front mounted accessories, the hood, could possibly sever engine oil or ATF cooler lines, radiator hoses, etc. While there are cheap pullers available that are usually good for a couple uses before it strips out or bends, unless this is a one-time repair and it's not anticipated to ever be done a second time it's always a good idea to invest in a quality tool that's made to last. [[File:SUM-G1025 damper puller-installer.jpg|frame|left|Summit p/n G1025 damper puller/installer tool]][[File:Cheap damper puller.jpg|frame|right|250px|Cheap puller]][[File:Damper installer tool.jpg|frame|left|300px|Damper installer tool, metric and inch crank threads]] <br style="clear:both"/> =Procedures= ==Removal== The pulley and anything else in the way is first removed so the damper can be accessed. The puller is installed using the same thread bolts that secured the bottom pulley. The procedure shown is for most engines up until the LS-series Chevy and the Gen 3 Hemi, etc. Start out with the puller center screw lubricated well. The crank will have a recess for the puller shaft nose to index on. [[File:Balancer puller installed.jpg]] On the Chevy V8 the bottom pulley bolt thread size is 3/8-24. Most engines will be either 5/16-18 or 5/16-24 or 3/8-16 or 3/8-24. You won't be able to use the original pulley bolts; most puller sets come with an assortment of bolts, otherwise find three that are the same length and long enough to use the puller. Take the bolts down evenly so the puller is centered on the snout then use a breaker bar to tighten the puller. The crank may try to turn once the puller is tight; you can run a prybar through the puller bolts to hold the engine from turning, or get a helper under the vehicle to hold the flexplate or flywheel. If it's a manual trans you can put it in gear and set the parking brake and block the wheels to keep the engine from turning over. Don't be tempted to use an impact wrench on the puller. This will damage the threads if over done. Keep turning the center screw of the puller until you feel/see the damper start to back off the crank. Once it starts, most of the time it will come off the rest of the way easily. Don't let the damper drop onto the floor. Once the damper is off, remove the puller bolts and store the tool away for the next time. If the damper is to be reused, clean it off first, coat the snout inside and out with motor oil and store away from rain, etc. ==Installation== ===With threaded damper bolt hole in crank=== ===Without threaded damper bolt hole in crank=== <br><br><br><br> {{Youcanedit}} [[Category:Engine]] [[Category:Undeveloped articles]]
Template:Note1
(
edit
)
Template:Warning
(
edit
)
Return to
Harmonic balancer/damper - How to remove and install
.
Personal tools
140.248.77.145
Talk for this IP address
Log in / create account
Namespaces
Page
Discussion
Variants
Views
Read
View source
View history
Actions
Search
Navigation
Main Page
Recent changes
Random page
Help
All articles
Start a new article
Hotrodders forum
Categories
Best articles
Body and exterior
Brakes
Cooling
Electrical
Engine
Fasteners
Frame
Garage and shop
General hotrodding
Identification and decoding
Interior
Rearend
Safety
Steering
Suspension
Tires
Tools
Transmission
Troubleshooting
Wheels
Toolbox
What links here
Related changes
Special pages
Terms of Use
Copyright
Privacy Policy
Your Privacy Choices
Manage Consent