bearing replacement

[Bernie Benz]

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Steve,

Maybe there is such a tool that I am unfamilar with, but I would have some
qualms with and not use this method for several reasons.

1.  Other parts need inspection and PM, and are accessable when removing the
strut.  Namely, Upper strut thrust bearing, ball joint, and tie rod end.
If a paid wrench contracted only to fix what is broke, one wouldn'tbother
with this.
2. If one's plan is to only replace what is broke, a thorough bearing
disassembly and cleaning is an essential preliminary to inspection.
I would rather reassemble a good used bearing in a bench press where I can
see what I'm doing, the inner race not having been removed from the hub.
Inasmuch as these bearings are $50.+ each, PM rather than replacement
is worthwhile, IMO, again differing from a paid wrench.

Judging bearing race integrity is a very simple and obvious visual
inspection of clean parts.  The race failure will be gauling in one
small area of an outer race, very obvious.

Bernie

From: Steve Crosbie <scrosbie at integraonline.com>
Date: Thu, 30 May 2002 23:52:46 -0500
To: Bernie Benz <b.m.benz at prodigy.net>
Subject: Re: bearing replacement


Bernie,
Sorry my intro was confusing.  I have 4 different cars (2 - '87 5ktq's, 1-
'87 4kq, and a '97 A4 1.8tq) that have bearing problems - luckily one wheel
each and in varying degrees of trauma.  One 5k (newest one just purchased
for my daughter) is very very noisy - the rest are just singing peacefully,
but getting louder with time.  I got a response from someone who used the
Hub Shark on 4 different Audis (3 quattros) and some lesser asian cars, with
excellent results (it comes with all kinds of adapters for almost every
application).  I am leaning towards this tool since his experience was that
it is very fast fix, needs no hydraulic press, spring compressor tool, no
strut housing removal, no wheel alignment, etc. His opinion:
"This tool is to wheel bearings what the microwave oven was to popcorn and
bacon. IMHO".   I read your bearing Postmortem and am not sure I feel
qualified to judge bearing integrity especially if the grease has dried out.
How do you clean/lube this type of bearing while still in the hub?  Thanks,
Steve
.

Bernie Benz wrote:
Steve,

First let me try to decipher your gibberish!  You maybe have a Q about
bearing wheel replacement, as the subject line indicates?  But I think maybe
not on a Porsche upgraded to UFOs!

You nust have either:
1. Two Audi 20Vs in which you think that all the front wheel bearings are
going South or,
2. One 20V  which you believe has two wheel bearings on each front side,
both sides of which are going South?
Multiple choice, 1.or 2.?

My first Q in response:  If you are thinking of doing the job yourself and
want to do it right, why are you looking for a means of in situ replacement?
IMO, a flawed plan.  Don't fix what ain't broke!  That requires detail part
inspection, and lots of other stuff needs PM while you are in there.  You
may have to rent or borrow the use of a hydraulic press to do it right, but
do so.

In case you missed it, I'll forward my Wheel Bearing Postmortem posting of
last
Nov. for your consideration.  If explicit Qs, ask.

Bernie



From: Steve Crosbie <scrosbie at integraonline.com>
<mailto:scrosbie at integraonline.com>
Date: Thu, 30 May 2002 17:57:23 -0500
To: 200q20v at audifans.com
Subject: bearing replacement

A while ago when I was helping engineer a UFO bolt on porsche
caliper brake setup (with cut down hubs), someone, I think it was Chris
Miller mentioned that Audi may have a wheel bearing press to replace
press on bearings in-situ.  Local Audi dealer was of no help and
Anderson's have no such tool.  I was told that Snap On, Mac etc. made a
wheel bearing press.  Any BTDT for this operation.  I have 4 ready and
willing patients who need to have their songs removed (larynxectomy?)
from the front end!  Thanks in advance,
Steve


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