Bilstein/H&R conversion: What parts to re-use?

Roa, Greg Greg.Roa at Cinergy.COM
Fri Mar 5 17:44:17 EST 2004

Don't add oil into the strut housing when you convert over to Bilsteins.  They have a design that is inverted as compared to normal struts.  If you look at the bottom of the inserts, there are two vent holes there, which shouldn't sit in oil.

Good Luck!
Greg Roa
Cincinnati, OH
86' 4kcsq x2
87' 5kcstq
93' 90CS
83' 944

>Date: Fri, 05 Mar 2004 12:40:09 -0500
>From: Ameer Antar <antar at>
>Subject: Re: Bilstein/H&R conversion: What parts to re-use?
>To: a.sigal at
>Cc: Quattro List <quattro at>
>Message-ID: <20040305174005.D4BA882D3B at>
>Content-Type: text/plain; format=flowed; charset="iso-8859-1"
>Thanks for the help. The cap for the boot seems to fit, but I'm not sure if I should keep >the lower washer that goes above the bump stop (in the original design). Did you end up >>getting rid of that too when installing Bilsteins? About the oil, what kind of oil would >be appropriate? Will the oil affect the rubber seal on the new strut cap? Thanks for the >advice.
>---Original Message---
>From: Ado Sigal <a.sigal at>
>Date: 3/5/04 2:24:13 AM
>Subject: Re: Bilstein/H&R conversion: What parts to re-use?
>Generally speaking, there is internal bump stop 
>inside Bilstein cartridge, so you don't need the OEM 
>stop, and you can chop it off. All other parts you 
>should use. The boot carrier part you have to keep, 
>providing the shaft is same diameter, otherwise new 
>one is required. The boot carrying part should be 
>big enough to allow full susp. travel before 
>contact. Make also sure that you fill the cavity 
>between the cartridge and strut wall with old oil, 
>for temperature transfer, without it, the cartridge 
>is going to have much shorter life.

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