front wheel hub runout
Thread Starter
Intermediate
Joined: Oct 2005
Posts: 46
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front wheel hub runout
Putting some aftermarket hats and rotors on the front of my car. After installing them decided to put a dial indicator on one of the rotors. Much to my dismay, rotor runout is over 10 thousands. Pulled the hat and rotor and put the dial indicator on the hub the best I could, working around the wheel studs, and discovered what appeared to be approximatly the same amount of runout. Is this normal? I believe the stock setup had the rotors rivited to the hubs and spacers/shims were added if necessary to compensate for runout prior to riveting. I always thought this was for compensating for the rotor runout, not the hub. Is this much runout for the hub normal or average? Or do I have a set of hubs that are the extreme in lousy tolerances. The car did not have brake calipers and the rivets were gone on the the rotor/hub assemblys when I bought it so I dont know how it was set up stock. Anybody else had this problem with their hubs? Thanks!
Safety Car
Joined: Dec 2005
Posts: 4,270
Likes: 20
From: Central Michigan
Had this exact same problem on my 68, and was told to make sure the bearing races were seated properly. They were fine, so I ended up taking the hubs to work and machining the hub faces till they were true.
I marked the high/low areas and dialed them in accordingly on a 4 jaw. If you don't have access to a lathe, a local shop should be able to do it.
Hope I've helped out
I marked the high/low areas and dialed them in accordingly on a 4 jaw. If you don't have access to a lathe, a local shop should be able to do it.
Hope I've helped out
Thread Starter
Intermediate
Joined: Oct 2005
Posts: 46
Likes: 0
answer
Well, I will answer my own question. After posting the above question, I desided to drilll the rivets out of four other hubs and rotors I have lying around. The answer is that the runout on these hubs is all over the board. I originally thought I would drill these others out looking for some shims which I did not find in any of them. Out of the four, the approximate runout was two over 8 thousands, the third had 4 thousands and the fourth 3 thousands. Looks like I will be knocking out the brand new bearing races and 1/2inch studs on the original two, and going with the two best. Sure enough I picked the worse two to start. Good old 60s and 70s chevy quality control. Thanks 682XLR8 For the reply!
Last edited by wes weigle; Mar 31, 2006 at 01:23 AM.
