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C3 front hub truing for flat, runout free brake rotor installation...
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Posted: 11/01/09 07:22 AM
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i thought i would share this....
i saw in this article...
http://www.corvettefever.com/techarticles/corp_0604_chevrolet_corvette_c3_brake_upgrade
that the hubs get bent when lug nuts are over tightened.. wheel studs also stretch when the lug nuts get over tightened..
if you seem to have run out on the face of the hub ... it is possible.... with an intelligent brake lathe operator.. to remove the high spots without effecting the rotor mounting distance from the caliper...
remove the rotors.. the hubs... the studs really need to be pressed out.. with proper tooling.. i usually tap them out with a 2 or 3 pound hammer while the hub is still mounted... since i usually put new bearings and races in ...
i then take the hub to the brake drum and rotor lathe... spin it up and just remove the high spots... just barely enough to clean up the face..
when installing new studs... instead of pressing them in.. i use a stack of hardened flat washers.. with a greased lug nut turned flat side in.. to pull the stud into place.. i normally keep some half inch , nine sixteenths and five eighth hardened flat washers in my tool box to pull new studs into the hub..
i just thought i would share...
and please... when doing a brake job.. with removable bearings.. if you don't know how long ago.. the bearings were last cleaned and packed.. do it if you have the time... and the ability.. doing it takes about half an hour with all the cleaning you need to do per side when you have it torn down and the rotor off..
if your dust cap got damaged when you removed it.. you and put it over the head of your hammer.. and tap it slightly with another smaller hammer to make it round again.. so it fits tight.. and keeps the dirt and any water out... i also tend to seal the dust cap to the hub with a small bead of high temp silicone.. that way i know its sealed... and i was the last one to do it... creative mechanics put mileage in silicone when the bearings were packed on the dust cap... like 53K for 53,000 miles..
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