Rock and Roll in the Sun

Mazza

Zorg Guru (V)
Supporter
British Zeds
The M44 Massive
Joined
Nov 1, 2017
Points
190
Location
Bognor Regis
Model of Z
Z3 1.9 M44 Roadster Z3 2.8 Roadster
NO not this kind of Rock and Roll……. EX Rock Star now…….
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The kind where every time you accelerate or brake, the seat rocks!!!!! ( obviously the seat wants to join in with me singing along to my backing tracks in the car 😱😱😱😱


So having found the spacers, that I have had for ages, decided it needed doing….so an early start today

So the offending article…. Why are things so bloody heavy these days ….. or might just be me getting weaker
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Removed the seat belt bolt (16mm socket). Then the 4 bolts for the seat 2 x 16mm and 2 x 13mm).
Came out easy as greased when installing them
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Tilt the seat forward and disconnected the wiring. ( the one with the green bit on is not used on my car)
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In case you are wondering about the label….
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This is for the heated seats that I fitted. Just to give any future owner a heads up as to how they are wired as I cut off the original plug and used a new 4 way plug and socket.

Then seat out and a decent working height
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Took some measurements just to make sure it went back the same.

I started on the left side looking at the seat, by undoing the 2 small T25 torx screws about halfway down the runner , then the T50 at the back.
Once these are out you can slide , albeit wiggle it and swear at it , and it comes out.
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You can see that the right hand side is missing most of the spacer where it's been chewed up…Before unscrewing the rod take the measurement from the tip of the threaded rod to the face of the housing as this needs to be the same when reassembling.
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Keep the parts from each side together as they are handed and the two rods have opposite threads on them ( one right hand and one left hand)

Then cleaned up the bits and proceeded with the other side..


Similar, start by undoing the T25’s, but now you will see that the T50 is obscured…slide the runner forward and it comes into view and can be removed
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Same as the other side…. Rear part chewed up
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These shims are original BMW as they are joined together, whereas most replacement parts are not joined.
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So after cleaning , Tea break …( and no I didnt have a beer,,not at 8.45 in the morning 😱)


Reassembly started with measuring the gap that has to be filled… it was actually 5.97 but I moved the vernier setting up the photo :whistle:
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The nylon spacers that I had were 4.28mm thick so had to reduce them to 2.98.
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Easiest way is to hold a piece of sandpaper flat on the bench and rub the spacer in circles and try to hold it as flat as possible….
I did one and set it in the housing with the threaded insert and then kept testing the second one to see if it would fit as it needs to be a nice snug fit.
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Both done, cleaned and measurement set back up and checked
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Then make sure each threaded Bar assembly goes back where it came from…..and it slides back in. Make sure the hole at the end of the threaded bar marries up with the small square drive shaft at the front end.

Tighten the T50 first then the 2 x T25’s
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When I re measured there was a difference of about 1mm between the left and right side … not enough to worry about and better than it was before.

Then seat back in , connect the wiring … seat fixings and thats it… Done
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quick run round the block and no more rock and roll =))=)):thumbsup:
 
Last edited:
Good write up Malc, I did mine a few weeks ago and yes agree with you the seats seem heavier these days ;)
 
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