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Re-packing your
Corvette’s front wheel bearings is a dirty job, but someone has got to do
it. The front wheel bearings should be
re-packed every 30,000 miles or sooner under harder use conditions. This is an important service operation which
has a definite bearing on safety. A
Corvette with loose front wheel bearings will lack steering stability. It may have a tendency to shimmy or wander as
you drive down the road or it could cause increased wear or cupping of the
tires. Worn front wheel bearings will
give you a definite vibration through the steering wheel along with a
pronounced low growling or whining noise.
Our Project 77 had worn front wheel bearings so we are not only
going to re-pack the bearings but replace them along with some other needed
items. We contacted Zip Products, Inc.,
8067 Fast Lane, Mechanicsville, VA 23111, (800) 962-9632, and they were able
to supply us with everything we needed to complete the service procedure. We have our grease gun in hand so let’s get
packing.
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01: Here are the new items Zip provided: Inner and Outer Bearing Kit, spindle seals,
axle cups, spindle washer, spindle nuts and dust shields. You will also need some common hand tools, a
torque wrench, jack and jack stands, and wheel bearing lubricant that is water
resistant and has a high melting point.
A shop manual for your year Corvette will also be very helpful. |
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02: Place the car securely on jack stands. Remove the brake caliper and use safety wire
or even a bent coat hanger to hang the caliper from the frame. There is no need to disconnect the brake
hose. Also you will see that we placed
some wooden blocks between the brake pads to keep the calipers contracted. This will make it much easier when it comes
time to re-assemble
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03: Remove the axle cap cotter key, axle nut, washer and
outer bearing. |
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04: To remove the inner bearing and seal, re-install the
axle nut a few turns by hand. Place your
hands on each side of the rotor and make a quick even pull towards you. This will easily pull the inner bearing and
seal out of the rotor.
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05: We are going to replace the dust shields because they
were damaged. The lower retaining bolts
are different lengths so keep track of their position. The upper spindle bolt has tabs from the dust
shield bent against the head of the bolt.
Bend these tabs back to remove the bolt.
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06:
With the dust
shield removed, scrape off the old spindle seal.
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07: Thoroughly clean the spindle shaft. Mineral spirits and a hard bristle brush will
work wonders. Dry the shaft off and look
for any deep gouges, nicks, scour marks, dark spots caused by heat, or out of
roundness. Since the wheel bearings are
a slip fit, any of these conditions will cause a problem with the
bearings. So a spindle with any of these
problems should be replaced. |
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08: Now thoroughly clean the bearings. You need to remove all of the old
lubricant. Again, mineral spirits and a
hard bristle parts brush will work. Also
thoroughly clean the bearing area of the rotor.
Remove all traces of the old lubricant. |
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09: After the bearings are thoroughly washed, blow out the
excess solvent with compressed air. DO NOT ALLOW THE BEARINGS TO SPIN FREELY WHILE YOU
USE THE COMPRESSED AIR TO CLEAN IT.
I know it’s cool to let the bearing spin, but you will do damage to
it. When the bearing is dry, check for
damage to the rollers and also the races.
Look for pits, dark spots, uneven rollers, discoloration or chips. Hold the bearing edges in one hand, then
place your fingers in the center hole of the bearing simulating the spindle and
put pressure on the rollers as you turn the bearing. If you feel any hard spots, flat spots, or a
jerky roll instead of an easy roll, replace the bearing. Two of our bearings were bad so we are going
to replace them all. |
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10: Whenever you replace any wheel bearing, also replace
the wheel bearing race. To remove the
old race, look for these cut out areas in the rotor. This will allow you to place a brass drift up
against the edge of the old race and tap it out.
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11: Here you can see how the race can be tapped out of the
rotor. |
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12: Install the new race with a bushing installation
tool. (Available from any tool
rental) Make sure you start the new race
squarely into the hub to avoid distortion and possible cracking. Use a brass drift to make sure the race is
seated all the way down against the hub lip. |
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13. Lubricate the races with water resistant, high melting
point wheel bearing lubricant. I like to
use Amsoil GLC-10 Synthetic Grease. It
is a high temp, water resistant extreme pressure lubricant. The choice is up to you.
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14: The easiest way to pack the wheel bearings is to use
this wheel bearing packing tool. They do
an excellent job and are readily available from most auto parts and catalog
tool companies for under $10. All you do
is place the bearing in the bottom, slide the top down onto the bearing, attach
the grease gun and start pumping. It
will do a much better job than you ever could by hand. |
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15:
Place the packed inner bearing into the hub and
install the grease seal. Remember to
make sure the seal is placed squarely into the hub then gently tap it into
place.
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16: You can now install the spindle seal and dust
shield. Remember to put the correct
length bolts into place and also bend the tabs around the top retaining bolt. |
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17: Place a thin layer of wheel bearing grease on the
spindle and slide the rotor onto the shaft.
Then re-install the outer bearing, washer and nut. (Hand tighten
the nut only) Re-install the caliper
and wheel.
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18: This is the proper way to adjust the front wheel
bearings. |
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19: If you have a 65 to 68 Corvette you will need to
install a static collector on each front wheel.
These were used to suppress static in the radios. |
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20: After the wheel bearings are adjusted and the cotter
key is installed, you can then install the axle grease cap. Use either a large socket (my favorite) or a
flat blade screwdriver along the edge to install it. Never hit the center of the grease cap with a
hammer to install it. When this is done,
re-install the wheel cover or center cap on your wheel. Remove the car from the jack stands and get
packing. |
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WHEEL BEARINGS:
65-82 FRONT WHEEL BEARING RE-PACKING AND REPLACEMENT
SOURCE:
Zip Products, Inc.
8067 Fast Lane
Mechanicsville, VA 23111
(800) 962-9632
PARTS LIST:
The Author would like to thank Scott Coral of Greg Donahue Collector Car Restorations, Inc. for his
assistance with this article.
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