Z1 hardy disc quibo

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Cabrioot
Joined: Wed 23 Oct, 2013 22:31
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  Z1 roadster

Z1 hardy disc quibo

Post by Cabrioot » Mon 04 Nov, 2013 11:59

I think the hardydisc from my z1 has wornout.
In between the gearbox and the diff is a fixed tube in wich the drive shaft turns.
Someone ho now how to change the disc and how much work it maybe.
All tips and tricks an adjustments are welcome.
Thanks :rtm:

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Racing Tortoise
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Re: Z1 hardy disc quibo

Post by Racing Tortoise » Mon 04 Nov, 2013 13:34

In case anyone was also flummoxed, my friend Google tells me a "hardy disc" is disc-shaped flexible coupling which I am guessing, in the case of the Z1, connects the transmission to the torque tube....
Currently: bereft of Z1
Previously: 1991 Ur-grun Z1 and 1991 Traum-schwartz Z1

Cabrioot
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  Z1 roadster

Re: Z1 hardy disc guibo

Post by Cabrioot » Mon 04 Nov, 2013 22:29

In-between the transmission output shaft and the driveshaft, there is a flexible coupler that joins the two together. This rubber, reinforced coupler isolates vibration from the rest of the drivetrain, while transferring power from the engine and transmission to the rear differential and wheels. As the car ages, and is exposed to the elements, these discs (or guibos, as they are sometimes called) develop cracks and begin to disintegrate. The rubber shell is reinforced with rope cords on the inside, and it is not uncommon to see one completely fall apart with the cords flying everywhere.
To avoid problems i want to change the disc.

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Robert T
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Re: Z1 hardy disc quibo

Post by Robert T » Mon 04 Nov, 2013 23:15

There is a similar part on the Z3, and a guide to changing it on an E36 here: http://www.pelicanparts.com/BMW/techart ... -Guibo.htm

It may be worth searching that site for a similar article for the Z1.

Image
Drive shaft assy-univ.jt./const.vel.jt. - BMW parts catalog

I believe it is part #3 above, looking at the picture of the part in the article - though the description of "Universal Joint" seems a bit odd - assuming it is the correct part, it is the same as used on the E36 3-series and M44-engined Z3 1.9.

Cheers R.
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Cabrioot
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  Z1 roadster

Re: Z1 hardy disc quibo

Post by Cabrioot » Mon 04 Nov, 2013 23:45

Thanks for the reply but the z1 has a different driveshaft.
It running into a pipe wich is connected to the gearbox and the diff.
To change the disk the hole piece have to be taken in to pieces but i dont now how.
On my z3 i have changed the disc with no problem.
See you have also a frogeye

a1z1
Joined: Tue 04 Sep, 2007 21:43
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Re: Z1 hardy disc quibo

Post by a1z1 » Tue 05 Nov, 2013 21:15

Hi Cabrioot,

The part is the same as shown in the picture above (3) its the same part as used on current BMW's.
To change it on a Z1 you have to seperate the gearbox and torque tube to gain access to the drive shaft and joint inside.


Regards

Ivor
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Cabrioot
Joined: Wed 23 Oct, 2013 22:31
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Re: Z1 hardy disc quibo

Post by Cabrioot » Tue 05 Nov, 2013 21:38

Ivor.
Thanks, does it mean that i have to take the diff also loose and pull it back to get space at the gearbox side?

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Stoertie
Joined: Fri 04 Jun, 2004 06:52
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Re: Z1 hardy disc quibo

Post by Stoertie » Wed 06 Nov, 2013 22:13

Hi Cabrioot,

to Change the hardy disk (no.3) you have to take out the silencer, the differential and (because it's easier) the aluminum pipe (supporting tube) round the drive shaft. A lot of work! :-(

Normal you also need the part with no.4, because there are also rubber parts inside, wich have become hard. Eventually you should think about, to take new nuts and bolts. At my car two of the three bolts (no.5) break on our tour through the alps in Austria... :shock: (the car brought me the 1000km back to my home, but it has very bad vibrations between 60 and 75 km/h)

Good luck!

Regards
Michael
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Cabrioot
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  Z1 roadster

Re: Z1 hardy disc quibo

Post by Cabrioot » Mon 25 Nov, 2013 21:16

Thanks for the advice. It wil be a winter job but i have to do my mgb first.
I keep you all informd

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