Rear springs replacement?

[alpinab3]

Does anyone know if replacing the rear springs on a E89 is any different to the E85? BMW TIS mentions unbolting the driveshaft at the diff end which I'd rather not do.

Thanks

 

[flybobbie]

No just unbolt the shock at arm, the spring can be pulled out with a bit of down force on the swing arm.

 

[alpinab3]

Thank you

 

[alpinab3]

I fitted the springs and the left spring kept binding so the top coils were rubbing against each other creating witness marks. I turned that spring around and it seem to solve it. Now 50 miles later both rear springs are now binding making creaking noises at low speed. The springs are seated properly. They are KYB springs with the correct part number for my spec Z4. Has anyone experienced this before?

 

[mcbutler]

Change the spring seat rubbers at the same time.
I had to get my indy to do mine as I could not shift the shock bottom bolts with a 3ft lever!!!!!!

 

[flybobbie]

When i first had my car there was a rubber bumping noise from the rear right side over uneven roads. BMW couldn't solve it.
It seemed common on US cars in the early days of these cars.
I removed the spring, washed the rubbers, talc powdered them and replaced, but with the spring rotated 45 anti-clockwise from the position it should be in, with ref. to the the lettering on the spring. It cured the bumping.

I think the springs pinch the rubbers and rebound.

It was know about by BMW 20 years ago in a bulletin.

 

[alpinab3]

Thank you. The original springs had the same S1 lettering. The replacement KYB spring coils are much thicker than original.