What is this?

[Xh XR6]

Hi guys

Helping dad fix/modify my sisters exhaust today and we found this bolted around the exhaust pipe. What does it do? Is it needed?

As far as i can tell it may soak up some heat and stop the exhaust moving around.

Any help or suggestions would be appreciated

http://www.opelaus.com/gallery/albums/userpics/barina1.JPG

http://www.opelaus.com/gallery/albums/userpics/barina2.JPG

Cheers

Ben

[btm]

looks like a lot of extra weight!

[PaulyJ]

Where abouts along the exhaust was it fitted? What car is it on?

[Tigra]

looks like a lot of extra weight!

True.....strange.

[Xh XR6]

Sorry, it was bout 150mm past the cat on a corsa B

PaulyJ: Were changing the springs and struts at same time and fitting whiteline swaybars of your old black barina.

Ben

[kaoshunter]

maybe a heat sink, how heavy is it?

[rjastra]

more likely it stops a certain resonance

[USC]

could be to prevent some sort of rattling. or to hold the pipe together at a weak point so it does not crack.

[SKM_87]

they are for resonace. most cars have something of the like on the exhaust.

[USC]

Ive seen similar things on driveshafts too...but made of very hard rubber and placed at random spot.

[SKM_87]

thats a rubber coupling, simliar idea but not.

[Xh XR6]

Hi

It's cast iron and quite heavy. I didn't couple two pipes together. I reckon your right it's probably for resonance.

Cheers
Ben

[PaulyJ]

Atleast my parts are being used and not lying there at a wreckers.
If you need any more help with the car, let me know.

[Wraith]

On TS convertibles, there's a huge chunk of cast iron like that on the drivers side at the rear, just behind the rear bar mounted onto the chassis...

It's about the size and shape of a domestic brick, well maybe a little smaller - always wondered WTF this was for and always put it down to electrical earthing mass or similar ???

can't be for resonance as it's no where near the exhaust...

[rjastra]

On TS convertibles, there's a huge chunk of cast iron like that on the drivers side at the rear, just behind the rear bar mounted onto the chassis...

It's about the size and shape of a domestic brick, well maybe a little smaller - always wondered WTF this was for and always put it down to electrical earthing mass or similar ???

can't be for resonance as it's no where near the exhaust...

Its probably soaking up some vibrations in the body
Apparently the early 90's Maxima had a similar lump of metal in the boot for the same reason.

[Wraith]

Its probably soaking up some vibrations in the body
Apparently the early 90's Maxima had a similar lump of metal in the boot for the same reason.

You may be right ??

When/if I get the time, I'm going to remove it and see if it makes a noticeable or unfavourable difference...if not, it's staying off as I reckon this lump of cast iron weighs at least 25 pounds or more...

[Keep'emRunning]

polarizes the exhaust gases :)

[Jerram]

I'm agreeing with the last poster - wouldn't be at all surprised if the center section would resonate like a big tubular bell if left unchecked. - It also would be a heat-sink to stop the very hot exhaust gas weakening the brackets attached to it.