The steering guibo (universal joint between rack and steering shaft) on my 2001 325xit was replaced awhile back; but I wasn't careful about it and my steering wheel ended up a few degrees off center even though the car tracked straight. So while the subframe and rack were off for an oil pan gasket replacement, I decided to re-center everything. But first I wanted to insure the rack was on center. Here's how I did it:
1.) Turn the rack all the way to the left, then all the way to the right. Dividing the number of turns by two, locates the approximate center.
2.) Measure the rack and located the center of the rack, which on mine was a raised rib on the body of the rack housing. Using a framing square, measure the distance from this center rib to the ends of each rubber boot. Be certain to insure the boots cover the equal parts of the inner tie rods. The splined shaft was turned until the rack center was located.
3.) On the splined shaft there should be a movable plastic collar with locator triangle which can be rotated around the shaft. Below the collar, on the shaft housing is a green tab. Turn the locator triangle until it matches up with the green tab.
4. ) Finally, the steering guibo was slid onto the splined shaft with the locator triangle slipping into the pinch slit on the guibo. Once locked down, this is the center of the steering gear and rack.
If the drivers steering wheel is centered and locked; then any off center dimensions need to be taken care of by readjusting the tie rod ends at an alignment shop. Hope this helps. gordo
1.) Turn the rack all the way to the left, then all the way to the right. Dividing the number of turns by two, locates the approximate center.
2.) Measure the rack and located the center of the rack, which on mine was a raised rib on the body of the rack housing. Using a framing square, measure the distance from this center rib to the ends of each rubber boot. Be certain to insure the boots cover the equal parts of the inner tie rods. The splined shaft was turned until the rack center was located.
3.) On the splined shaft there should be a movable plastic collar with locator triangle which can be rotated around the shaft. Below the collar, on the shaft housing is a green tab. Turn the locator triangle until it matches up with the green tab.
4. ) Finally, the steering guibo was slid onto the splined shaft with the locator triangle slipping into the pinch slit on the guibo. Once locked down, this is the center of the steering gear and rack.
If the drivers steering wheel is centered and locked; then any off center dimensions need to be taken care of by readjusting the tie rod ends at an alignment shop. Hope this helps. gordo
How to find center on the E46 steering rack
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