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From digest.v4.n791 Mon Jul 1 10:06:57 1996
From: "Rebel A. Cole" <m1rac01_at_FRB.GOV>
Date: Mon, 01 Jul 1996 11:15:38 -0400
Subject: <E28> Front Wheel Bearing Replacement
Did the left front wheel bearing replacement last night. It
was a piece of cake compared to what I expected. The hardest
part was finding a big ol' socket. No one had a 46mm, and
Sears claimed they didn't have a 1 13/16" either. But I went
to Sears in person, and, lo and behold, they did have sockets
up to 2 1/2", albeit for a 3/4" drive. The socket was $19.99
and a 3/4" to 1/2" adapter was another $6.95. Add that to the
$109 for the bearing assembly itself for out-of-pocket cost of
~$136.
Removal was straightforward. Raise the car and secure on
jackstand with floor jack and wheel as backups. Remove the
wheel. Remove the caliper assembly (2 x 19mm through-bolts)
and secure to spring assembly with twine, wire, etc. Loosen
the 5mm allen set screw from the rotor and remove the rotor.
Pry off the hub dust cap from the end of the bearing assembly
using a screwdriver. Straighten the crimped section of the
hub nut using a punch or cold chisel (This was probably the
most difficult thing, followed by loosening the caliper
through-bolts.) Using the 1 13/16" socket and a breaker bar,
loosen the hub nut and remove. I was able to loosen the nut
by standing and rocking on the breaker bar. (The car was plenty
stable enough for this, although Bentley's recommends replacing
the wheel.) Use a ~ 6" wheel puller attached to the outside
flange of the bearing assembly to remove the bearing. The
outside portion of the assembly separated from the inside
portion, so I had to use the wheel puller a second time to
remove the inner portion. You might need a smaller wheel
puller to get to the inner portion if it doesn't come at least
partly off with the outer portion. Better to have one on hand
in case rather than find you need it after getting this far.
Clean up the ABS sensor and inner dust shield (I used carb
cleaner cos it was handy.) Coat the new bearing unit with high
temp grease and place onto spindle. Place the 1 13/16" socket
over the spindle against the inner race of the new bearing
assembly and tap lightly with a rubber mallet, being sure the
bearing assembly goes on evenly. Mine popped right on with no
trouble at all. Then reassemble. Replace the hub nut, tighten
to specs (214 foot-pounds), and crimp the collar to lock it to
the stub axle. Replace the rotor and 5mm rotor set screw, the
caliper and two 19mm caliper through-bolts, and the wheel.
Total R&R time was approximately 1 hour, but I was working
slowly. YMMV. BTW, this is an excellent time to replace your
brake rotor and pads, since you have to remove the rotor anyway.
Rebel A. Cole
'86 535i (180,000 miles, new left front wheel bearing.)
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