Seat rocking - not bushings.

[LaCroixBoix]

So after I replaced the seat rail bushings the seat no longer slid back and forth like I had hoped. I did however notice a NEW unfortuante movement. The seats rock now. I believe I have isolated the issue to this (I think rivet) that connected the seat upper to the height adjustment rods. I've circled the fatsner in question in red in the attached diagram. I got my buddy to sit in the seat and rock it while I held that joint. I got about 2mm of play.

Any luck/experience/advice on fixing/replacing this issue?

Thanks!

 

[bear2020]

Can't you drill it out and put a nut and bolt instead? I had to do that on my old E30

 

[LaCroixBoix]

Can't you drill it out and put a nut and bolt instead? I had to do that on my old E30

I have a feeling that you'd have to tighten the nut and bolt enough that you'd impact the vertical adjustment. If it was loose enough then you'd be back with the rock. At least that would be my concern with that approach - might be wrong though. Maybe there would be a goldilocks zone where it's in between those.

 

[Rudyrov]

Would like a better look at it, a parts drawing leaves a lot to be desired. Perhaps it needs a bushing or a rod or both replaced.
I think it would be nothing that BMW sells but could be engineered and made, not a simple fix that’s for sure. Another alternative would be good used parts.

 

[LaCroixBoix]

Would like a better look at it, a parts drawing leaves a lot to be desired. Perhaps it needs a bushing or a rod or both replaced.
I think it would be nothing that BMW sells but could be engineered and made, not a simple fix that’s for sure. Another alternative would be good used parts.

I didn't get a super great picture but this from the same perspective of the diagram above. Couldn't get the other side. Moving the seat forward make a very loud noise so I need to take it back out and grease the bushings anyways - will try for a better one.

 

[LaCroixBoix]

Would like a better look at it, a parts drawing leaves a lot to be desired. Perhaps it needs a bushing or a rod or both replaced.
I think it would be nothing that BMW sells but could be engineered and made, not a simple fix that’s for sure. Another alternative would be good used parts.

 

[Rudyrov]

Thanks for the pictures!

Looks like a solid steel or brass pin goes through that joint and is mushroomed on one end to keep it captive. You would have to drill it out on the small end with the green paint and see if it's the pin or the steel seat frame that's worn out.

If it's a soft brass or mild steel pin it could be easier to fix but if it's the metal frame then a bushing would need to be inserted or the area would need to be reinforced and made round again and then it would need to be repinned.

I'm sure it can be repaired by a person that has experience with metalworking, but if that's not you then I would find a new frame or replacement parts at a used car parts vendor.