Z3 M front shock absorber differences

GazHyde

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Z4 MR
We had Lees old M Roadster visit the Zed Shed on Saturday for a suspension refresh. It was running Koni shocks and springs and they were getting a little tired. The new owner Matt dropped by with some new H&R springs and fresh Koni adjustable shocks.

Thought you might find this interesting as it's one of the visible differences in parts between ///M and non-M models.

The earlier Z3M Roadster/Coupe shocks fitted are a little different to standard Z3s. Sticker showing they are factory labelling, but this is more of a sleeve with a shock absorber inserted in it.
IMG_1447.JPG


The front shocks (stock image below) that fit these look more like the style you fit on the rears, and they slide in to the sleeve above.
upload_2017-2-7_19-19-36.png


The next pictures shows what the sleeve looks like with the shock removed.
IMG_1444.JPG


IMG_1443.JPG


Later M models and non M models (and most after market like Bilstein) use this all in one style.
upload_2017-2-7_19-22-27.png


But the principals are pretty much the same, and we soon had the old shocks removed and the new ones installed with the new springs.
IMG_1449.JPG


For reference a quick pic of an ///M top mount, which are a different shape to standard Z3's
IMG_1450.JPG
 

Antm72

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2.8
Very similar to some coilovers then without the threaded body to adjust the height.
Are they physically different in the way they fit or just the way they are put together?
 

GazHyde

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No physical difference in fitting versus a standard shock, just the assembly. A big bolt screws through the bottom of the sleeve to hold the shock in place.
 

Grandparipper

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Mar 20, 2017
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West side of Washington State
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3.0 Roadster
While we are on the subject of shocks and struts, I replaced all four with Bilsteins on my 1998 2.8 roadster (Non-M). As is typical of my thinking, I opted for the 'Sport' version to improve handling. It was only $20 more US for each one, so what the heck, right? I wish I had not done that. I don't go to the track or drive overly aggressively. The standard Z3 goes around corners really well. What I got was a stiffer ride. Not terrible, but if a person is going to go that route, they should probably replace the springs and the spring pads at the same time to something that matches the valving in the shocks. Next time, for me, I will stick with the standard rate shocks unless I am going all the way. Damn, I sound like a geezer!
 
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