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Rear Damper Data Point
- wyshyvanuk
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- Joined: Wed Apr 25, 2018 9:50 pm
- Location: Tucson AZ
Rear Damper Data Point
Just pulled one of the original rear dampers on my 2008 Z4M Roadster with 46K miles. Completely shot. It collapses with relative ease, and, once collapsed, stays there without a hint of any effort to expand again.
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- Lifer
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Rear Damper Data Point
Data point 2:
Mine was on the originals all the way to about 120,000 miles (obviously past their best, but not 'broken' per se). Then I replaced the lot with Bilstein PSS10.
Mine was on the originals all the way to about 120,000 miles (obviously past their best, but not 'broken' per se). Then I replaced the lot with Bilstein PSS10.
- MrPT
- Lifer
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Rear Damper Data Point
Thanks for posting this, but what do you mean “expand again”? It’s a damper so should resist force in both directions when unsprung.wyshyvanuk wrote: ↑Sun Sep 23, 2018 12:49 am Just pulled one of the original rear dampers on my 2008 Z4M Roadster with 46K miles. Completely shot. It collapses with relative ease, and, once collapsed, stays there without a hint of any effort to expand again.
2008 Z4MC: heavy wheels | crap suspension | skittish rear end | wobbly engine | not enough induction noise | underwhelming turn in | inconsistent braking | lardy battery | chubby steering wheel
2006 Z4 2.5si: gone
2006 Z4 2.5si: gone
- wyshyvanuk
- Member
- Posts: 76
- Joined: Wed Apr 25, 2018 9:50 pm
- Location: Tucson AZ
Rear Damper Data Point
Quite true, but they are also gas pressurized. When mounted, the barrel spring supporting the weight of the car will partially collapse the damper against that gas pressure. When a dip or pothole is encountered, that gas pressure will assist the spring in pushing the wheel down to maintain contact with the road surface.
- wyshyvanuk
- Member
- Posts: 76
- Joined: Wed Apr 25, 2018 9:50 pm
- Location: Tucson AZ
Rear Damper Data Point
mmm-5, I now have a serious case of suspension envy.