2.2 1971 - Front shock absorber replacement

[damsroy]

Hello,

it's my first post on this forum. Happy to join your community!!

I've already bought a 911 2.2E from 1971. The car is matching number and 8888 originally paint color.

First post and first question to the classics' specialist of this forum!!!

I need to replace the 2 front shocks absorber and it seems to be more complicated than I've first thank.....

The parts originally mounted on the car in 1971 was BOGE shock absorber strut (part's number 901 341 083 01 ) with spiral spring (but without torsion barre)

The parts currently on the car are the same BOGE shock absorber strut but the spiral springs has been removed and a torsion barre has been added!! A little bit hybrid!

I'm afraid that the BOGE shock absorber strut are the same since 1971 and I need to replace them by newone.

What parts I have to use? What are available????

Thanks in advance for your help!

Damien

[t6dpilot]

Damien,
Welcome to the slippery slope of early 911 ownership and congratulations on an excellent choice of transportation. These cars are very addictive and you will find a wealth of experience and help here on the Pelican BBS.

I am not so familiar with the original E hydrolastic suspension, but it sounds as if you had that originally and it was replaced - a common change as the hydrolastic suspension was not all that good and deteriorated fairly quickly so I am told. You have a number of good choices for shock replacement. You could go with another Boge - that is what I have on my 71T and they work just great. You could also go with a couple of different Koni shocks. I have Koni "Reds" on my lightweight car and they work wonderful, though somewhat stiff, but I like that kind of ride.

You can try a search in the Pelican store as they probably have what you need, although I have not looked since I don't need shocks. Also, use the search function on the BBS, it will provide a wealth of information from previous threads. Good luck and welcome to the longhood club.

[damsroy]

Thanks for prompt and encouraging answer!!!!

I understood that I can not only replace the insert because.... on my car there are no insert ;-). So that I have to repalce the whole shock absorber strut.


For information I currently have the S' aluminium caliper.

I was told that I have to mount shock absorber strut from a 3.0 SC because original strut for my car are not still available.

I'm very surprised about that!!!!

Damien (sorry for my english it's not my mother tongue)

[Grady Clay]

Damien,
Welcome to the Forum
You will find a lot of help here.
Your English is just fine.
If you prefer, post in French and use Google to translate.
Bi-lingual posts are just fine here.

So I understand; do you have original hydropneumatic struts?

If so, there are several other issues than just replacing the struts.
Obviously the struts need to be replaced.
The proper replacement is equivalent for a period 911S.
This has the 3.5” spacing for the aluminum brake caliper.

The replacement strut also uses the later ball joint and wedge pin hardware.

On ’71, the A-arm possibly does not have the splines for the torsion bar. If so, you need to replace the A-arms and add torsion bars and related parts.

On ’71, the front cross member may not have the torsion bar arm receiver. If so, you will need a new front cross member.

I recommend you replace the rear shock absorbers with equivalent to the new shock absorbers in the new front struts.

Best,
Grady


Damien,
Bienvenue au forum vous trouverez beaucoup d'aide ici.
Votre anglais est simplement bon.
Si vous préférez, signaler en français et l'utilisation Google pour traduire.
Les poteaux bilingues sont juste très bien ici.

Ainsi je comprends ; avez-vous les contrefiches hydropneumatiques originales ?

Si oui, il y a plusieurs autres questions que juste remplaçant les contrefiches.
Évidemment les contrefiches doivent être remplacées.
Le remplacement approprié est équivalent pendant une période 911S.
Ceci a les 3.5 » espacement pour l'étrier en aluminium de frein.

La contrefiche de rechange utilise également la goupille postérieure matériel de joint à rotule et de cale.

Sur' 71, l'Un-bras probablement n'a pas les cannelures pour la barre de torsion.
Si oui, vous devez remplacer les Un-bras et ajouter des barres de torsion et des pièces relatives.

Sur' 71, la traverse avant peut ne pas avoir le récepteur de bras de barre de torsion. Si oui, vous aurez besoin d'une nouvelle traverse avant.

Je vous recommande remplace les amortisseurs arrière avec l'équivalent aux nouveaux amortisseurs dans les nouvelles contrefiches avant.

Mieux,
Grady

[Scott at Pelican Parts]

Bonjour et bienvenue Damien,
You have the same front struts I recently removed from my 1971 911E

Anybody know what front struts these are?

I replaced those original struts with new later struts. I chose Bilstein HD shocks, 911SC torsion bars, and Carrera sway bars. This is a great combination for an early car.

Congratulations on choosing such a great year and model! If you haven't already, be sure to register the car at the 911E Registry at 911E.org

- Scott

[stew-man-chu]

Hi there and welcome aboard,

Another possible option...the previous owner of my '69 911E with original hydropneumatic struts converted my suspension to accept the current strut inserts (Koni in my case) by removing the inside spring and fluid, then (I believe) added a ring inside of the strut to keep the new insert centered. Then welded the insert gland nut (to hold the top of the Koni in place) under the original Boge hydropneumatic gland nut (see picture below). Everything went back together fine for me recently when I replaced the inserts. Of course you would still have to upgrade the A-arms as described above...

This could be a less expensive option as opposed to replacing both struts.



Good luck,

Stew

[damsroy]

Thanks for you help!

I understand that I have to repalce it and that I have many solution at my disposal.

I think that I have the hydropneumatics struts with torsion bar (because the springs has been removed).

To be sure I will post next week any pics of my struts to be sure about what is currently mounting on my car.

Thanks for your help and see you next week.

Damien

[Grady Clay]

Damien,

A hydropneumatic strut does not have a spring or a torsion bar. The gas pressure in the strut holds up the car. Because there is not a spring does not indicate that it has to have a torsion bar. You must look and see.

Best,
Grady


Damien,

Une contrefiche hydropneumatique n'a pas un ressort ou une barre de torsion. La pression de gaz dans la contrefiche supportent la voiture. Puisqu'il n'y a pas un ressort n'indique pas qu'il doit avoir une barre de torsion. Vous devez regarder et voir.

Mieux,
Grady