Exhaust vibration absorber

UK forum for general and technical discussion about the Z3 roadster

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Rodent
Joined: Mon 22 May, 2017 08:34
Posts: 24

  Z3 roadster 2.2i

Exhaust vibration absorber

Post by Rodent » Thu 22 Jun, 2017 10:52

My recently purchased 2.2 lit z3 had a strange metallic rattle on the passenger side. I had a look underneath and noticed that the vibration absorber (marked 80hz.) was very loose and wobbly. It looks like the spacers had rusted away, leaving the rubber lump very loose.
I have taken it off but still notice the rattle noise, perhaps a little quieter.
My question is: are these dampers really necessary? Will my exhaust shake itself to bits without the damper in place?
Thanks

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Gazza
Site Admin
Joined: Tue 04 Oct, 2005 21:58
Posts: 9133

  M roadster S54
Location: East London/Essex

Re: Exhaust vibration absorber

Post by Gazza » Thu 22 Jun, 2017 17:33

I removed it from my 2.8, didn't notice any difference.
Gazza


2001 M roadster S54 Image 1965 Mustang 289 Fastback, various other Yank Classics. BMW Z1, BMW M3 CSL.

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lightning
Joined: Tue 27 Nov, 2007 08:15
Posts: 808

  Z3 roadster 3.0i
Location: Stockport

Re: Exhaust vibration absorber

Post by lightning » Thu 22 Jun, 2017 21:07

Must be there for a reason.

Rodent
Joined: Mon 22 May, 2017 08:34
Posts: 24

  Z3 roadster 2.2i

Re: Exhaust vibration absorber

Post by Rodent » Fri 23 Jun, 2017 12:34

if its necessary to remove harmful vibration, why then has my exhaust system not shaken itself to pieces since I removed it? I read somewhere that for the USA market, it was felt that any sort of vibration would detract from the driving experience. I have to be honest and say that between pot-holed roads, lovely exhaust note and my enthusiastic driving I have not really noticed any bad vibrations. whats left of mine was marked as 80hz, but looking online it seems there are many different hz. ratings available.

4wheels
Joined: Sat 24 Sep, 2016 20:42
Posts: 65

  Z3 roadster 3.0i

Re: Exhaust vibration absorber

Post by 4wheels » Sat 08 Jul, 2017 20:30

i was painting under mine today, well preparing for painting, removing the rust...
and noticed these, just looked them up... i thought thats what they were for but wasnt sure..... they gotta be heavy to do anything ? and heavy on a sports car is BAD!!

http://www.realoem.com/bmw/enUS/showpar ... Id=51_2331

ill be taking them off lol.

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