Ok, here's what Bentley says:
REPLACING IGNITION SWITCH/STEERING LOCK
The ignition switch snaps into place on the steering lock housing, on the end opposite the lock cylinder. The ignition switch and switch harness can be removed from the back of the ignition lock by using a small screwdriver to release the spring catch.
To remove the ignition/steering lock cylinder insert the key and work through the small hole to release the lock. on 1984-1986 models , the lock can be released by pressing in with a small screwdriver as the key is turned, as shown in fig 7-10.
On 1987-1990 model, turn the key clockwise 60 degrees and insert a 1.2mm (3/64 in.) diameter wire into the hole in the lock cylinder to release the lock.
Removal of the stering lock mechanism from the steering column is more involved. With the trim and the steering column switches removed as described above, remove the collar, the snap ring, the washer, the spring, and the plastic sleeve, in that order, from the end of the steering column. Then, use two screwdrivers to pry up the upper steering column bearing. See fig 7-11. With the electrical harness connectors disconnected, chisel off the head of the shear bolt. Then remove the steering lock mechanism from the steering column.
Installation is the reverse of removal. the new shear bolt is BMW Part No. 32 31 1 154 176. Tighten it until the head shears off. If the lock mechanism is being replaced, remove the carbon contact, shown in fig 7-11, from the old mechanism by drilling out the rivets, and sinstiall it on the new mechanism. Screws, washers, and nuts for this prupose are available from your authorized BMW Dealer.
I don't know if you already have this, and I don't have a scanner, or I would scan the pictures for you. I hope it helps a little. I don't have any personal experience in there.
'86 325es (TURTL3): PJ peetsa hawler
'87 535is (BADWATER): almost done... really.
'86 325e (GRN HLL): DD/show/rocket
'04 x3 3.0i: Wife's Bimmer (manual, woot!)
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