Bilstein internal bushing cut

[Rustam]

And found that this eliminated bottoming out. I have Eibach springs and no rubber rings under and above the suspension springs at front. The car seems to have gone lower after the cut, suggesting that the bushings were on the way. Approximate length cut off - 4 centimeters:

8109

8110

[BigKriss]

looks good mate

[Rustam]

looks good mate

thanks Kris

[632 Regal]

8112

8113

8114

8115

81168116

8117

81188119

[632 Regal]

Billies are the whip man!

[BigKriss]

The bump stop is on the bottom of the shock ??

[Rustam]

Billies are the whip man!

God, the first picture is so bad.

[Rustam]

The bump stop is on the bottom of the shock ??

yep... the shock is "inverted shock".
so it has to move up and down, and gets the yellow enclosure to make it possible, whose diameter is that of original normal shock absorber - meaning the actual Bilstein's shock absorber is thinner than regular Boge's...

[BigKriss]

Ok. I didn't know.

[Rustam]

I only found out last year myself, 9 years into having them...

[Rustam]

illustrating the width of the "shaft" here, the actual shock absorber body:

8120

[BigKriss]

Okay so what's the point of it? More travel before it bottoms out ?

[Rustam]

Okay so what's the point of it? More travel before it bottoms out ?

Exactly. See Jeff's first picture.

[632 Regal]

After blowing 2 Bilstein shocks within 9 months I changed to the Boge Sachs "turbo" struts. The ride was much cleaner, not harsh like the Billies and did not bottom out, the billies still bottomed out even after chopping the bumpstop. I think the Boge Sachs is a progressive strut design since they were so much more refined yet controlled much better. I'd have to look up the shorter bumpstop I used, cost much less than the M5 stop and the height was very close.

[Rustam]

I changed to the Boge Sachs "turbo" struts.


Jeff, would you please share the part number on these turbo struts, if you can.

[632 Regal]

Jeff, would you please share the part number on these turbo struts, if you can.

36 747A

No longer information in regards to the Sachs turbo word. Possibly a marketing gimmick years ago but this is the same part number I used.

Here is a link to the proper bumpstops for the Sachs/Boge with lowered suspension:

http://www.bimmernut.com/forum/showthread.php/43006-Bump-Stops-for-lowered-cars

[Rustam]

36 747A

No longer information in regards to the Sachs turbo word.

Thank you Jeff.

I thought by "turbo" you meant "turbogas", as in Boge Turbogas. I saw this number 36 747A and thought the "A"
designation in this number probably means its an Automatic as opposed to Turbo.

Checked the Boge catalog, Turbo struts are designated with "P" (36-676-P):

(Boge and Sachs catalogs are taken from here http://www.zf.com/corporate/en/products/spare_parts/technical_information/catalogs_spare_parts/catalogs.html)

8137
8138
8139

[632 Regal]

When I replaced the front Bilsteins I went with the Boge/Sachs turbos. To get the actual number I would have to dig through thousands of receipts. I just got this part number from a search and the number was not from me. The bumpstops number is me. I tried doing searches regarding turbo and came up with nothing. I imagine the standard Sachs/Boge are the same thing but not sure, not concentrating on this at the moment. Might check this after a trans job.

[632 Regal]

The bump stop is on the bottom of the shock ??

On the top between the strut and the top strut housing. I don't have a picture of this yet.

EDIT: if your using the Bilsteins the bumpstop is internal to the strut. As pictured above with the cutting, is what I thought would fix the issue but didn't.

[Rustam]

8145

[632 Regal]

Thank you Jeff.

I thought by "turbo" you meant "turbogas", as in Boge Turbogas. I saw this number 36 747A and thought the "A"
designation in this number probably means its an Automatic as opposed to Turbo.

Checked the Boge catalog, Turbo struts are designated with "P" (36-676-P):


Good point! I will go out to the barn and look at the old receipts and see what is actually written down vs what is memory holed in this computer.

Edit: Can't locate the receipts... in a box somewhere. I'll keep looking.

[Rustam]

Good point! I will go out to the barn and look at the old receipts and see what is actually written down vs what is memory holed in this computer.

Edit: Can't locate the receipts... in a box somewhere. I'll keep looking.

Please don't worry about that too much Jeff. Thank you for the help.

[Rustam]

bumpety-humpety