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E36 M3 (1992-1999) {Euro - S50 B32 321hp @ 7400 rpm} {U.S. - S52 B32 240 hp @ 6000 rpm}
Total Produced: 71,212 - Years Produced: 1992 to 1999


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Old Mon, Jun-04-2018, 11:50:29 AM   #1
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Default Fitting a B12 Bilstein Kit 46-000781

Hi All, I'm a new user to this forum and wanted to pose a question if I may. I am the owner of a BMW e36 M3 coupe 3.2 evo, Euro edition and am currently upgrading my suspension with the Bilstein B12 Pro kit and supplied Eibach springs. I'm using standard top mounts on the front (BMW part number: 31332227897) My question is thus:

Bilstein technical support instructions say to only discard the font bump stops as Bilsteins have them built in, however if I reuse all other parts, and most importantly the washer that sits below the top hat, then the thread that is available to fit the top nut seems a little short, (only talking a couple of millimeters here, the nut goes on but seems it could do with a couple more turns to get the nyloc to fully do its job).

The old oem shocks have a slight chamfer on the strut just below the top thread thus it allowed the concave washer to sit into the ball race of the top hat, the bilsteins shoulder below the thread is square, thus placing the washer reduces the thread available.

The question: Should I discard using the washer, this means the square shoulder of the B12 shock will sit on the race, according to Bilstein tech support, their picture does not show reuse of the washer, and thus they conclude that if a washer were to be used they would have supplied one, not sure I follow this logic entirely, but either way my concern is, is the shoulder of the shock sitting into the race acceptable....do I use the washer or not, and if yes how do I get over the shorter thread protrusion.... .. sorry for the long question but scratching my head here?
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Old Mon, Jun-04-2018, 04:51:24 PM   #2
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Default Re: Fitting a B12 Bilstein Kit 46-000781

Do you have a pic you can post? I had PSS9’s and they didn’t utilize the washer so I assume it’s the same. I also didn’t install the PSS9’s so who knows if it was done properly
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Old Mon, Jun-04-2018, 06:08:30 PM   #3
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Default Re: Fitting a B12 Bilstein Kit 46-000781

Sorry I don't have a pic, the car is currently with my mechanic who is fitting them, I will try to get one from him.

It's a crazy situation it seems and one that just shouldn't be this hard to find out, I am trying to help as he is also stumped.

The consensus at the moment seems to be leave them out, but most frustrating that even Bilstein don't seem to be able to give a definitive answer.

Glad to hear you left them out, although different shocks, but it goes some way to reassurance..

Thanks for the response anyway
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Old Tue, Jun-05-2018, 06:38:31 AM   #4
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Default Re: Fitting a B12 Bilstein Kit 46-000781

Are you talking about #11 in this diagram?



If so that's what the spring plate sits on and yes, it's required unless the shoulder of the shock shaft is bigger than usual.

I'm using those shocks and don't recall this being a problem. Part #11 does only fit one way though (concave side facing down). Yes, I think a picture would help.
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Old Fri, Jun-08-2018, 07:44:54 AM   #5
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Default Re: Fitting a B12 Bilstein Kit 46-000781

Hi M3an, yes I believe that is the part we are talking about, I am going over to the the garage today and will try and get a pic. I'm sure he was installing the washer the correct way, its just when it was all together the nut definitely needed a couple more turns.
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Old Fri, Jun-08-2018, 07:58:18 AM   #6
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Default Re: Fitting a B12 Bilstein Kit 46-000781

Make sure the bump stop isn't getting in the way, silly as it sounds.
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Old Fri, Jun-08-2018, 01:25:04 PM   #7
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Default Re: Fitting a B12 Bilstein Kit 46-000781

Hi, no bump stops, the oems are not used due to bilsteins having internal ones
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Discussing Fitting a B12 Bilstein Kit 46-000781 in the E36 M3 (1992-1999) Forum - {Euro - S50 B32 321hp @ 7400 rpm} {U.S. - S52 B32 240 hp @ 6000 rpm}
Total Produced: 71,212 - Years Produced: 1992 to 1999 at BMW M3 Forum.com (E30 M3 | E36 M3 | E46 M3 | E92 M3 | F80/X)