| Fix for C5 Rocking Seat? |
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This is a 97 sport seat being worked on. The seat "rocked" a good ¼". We unbolted the seat from its bottom track assembly.
The track assembly is constructed with a pair of upper and lower metal formed U channels. The lower channel is bolted to the car floor. The upper channel is bolted to the seat frame. There are 2 screws that attach the lower channel to a "silver" piece that turns on a threaded rod. The rod is bolted to the channel that the seat frame is bolted. This silver piece has the "slack" for rocking movement. First remove these 2 screws on each track. The two track parts are held in place with 5 plastic balls on each side of track, 3 front, 2 rear.
We used a large screwdriver hammered between the two track pieces to spread them so the balls could be removed (See Figure 1). This is done at each corner of the track assembly.
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| Figure 1 |
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There are 3 balls on one end, 2 balls on the other end. By pulling one part of the track to the end that you want to remove the balls, putting the screwdriver near the balls, you can spread the track parts enough to remove the balls (See Figure 2). Do this on both sides of the track on both ends of the seat.
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| Figure 2 |
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To remove the actual track bottom then, you have to remove the treaded rod itself. To do this, unscrew the large trox screw at the back end of the rod (See Figure 3).
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| Figure 3 |
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Then pull it out as you move the track pieces to separate (See Figure 4).
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| Figure 4 |
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We found the treaded black block to be loose in the silver looking piece (See Figure 5).
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| Figure 5 |
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The silver piece is bolted to one piece of the track, the treaded rod is bolted to the other track piece. The space in the silver piece allows movement of the seat when track is bolted to floor. We couldn't determine if any piece was missing from the silver piece to allow this gap shown in the Figure 5. (See Figure 6). (Note: Believe a black plastic filler bumper has been destroyed in usage.)
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| Figure 6 |
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I found some steel washers (See Figure 7) that would fit in the gap space. The fit is not tight, but with a little slop. I filed the washer(s) to fit into the silver piece.
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| Figure 7 |
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Filed center hole larger than threaded rod O.D. (See Figure 8).
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| Figure 8 |
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| Figure 9 |
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| Figure 10 |
Did both sides, then assembled it back together. You have to wiggle the treaded rod inside the track half as you slide the track in place. The other end of the treaded rod has a square hole that the drive spring rod fits into.
Have to use screwdriver again to spread the track pieces to reinstall the plastic balls. The track pieces had punched dimples at both ends that hold the balls in the track grooves. You have to spread the tracks apart enough to slide the balls past these dimples. Get the pieces threaded onto the rod at the same location on each side.
I had taken apart a 2000 MY seat and it didn't have any slack in the seat silver piece to threaded rod piece. I can't imagine why the 97 seat had this much or any slack in the silver piece, or if something was missing.
Entire set of larger pictures can be found
HERE:
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| Figure 11 |
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| Figure 12 |
