Rubber "O" exhaust hangers

[BMWTom]

I've been looking all over for information the rubber "O" shaped exhaust hangers, but can't seem to find any information. The ones that I ordered from Autoparts Warehouse seem to be too small. Do these come in different sizes, or are they supposed to be stretched out? They're hard to stretch when it's 25 degrees in the garage!

[jameshoward]

EDIT (talking nonsense) There is but one correct size. SEE ABOVE. SLS sell them. Look at the diagrammatic explosion on their website under the exhaust section and see if they look the same. They are round when new, and yes, you need to stretch them quite a bit to get them to hook on. They're rubber, so I don't thing heating them up will help.

JH

[Richard Madison]

I rarely know enough about anything to point out a possible error but I'm a kind of expert about the rubber exhaust hangers...

They do come in two  sizes...one is maybe 20% larger in diameter and thickness than the other.

Trying to stretch a small ring over the hooks for the large ring would not only be be very difficult, it might split the ring. Using a large ring on the small ring hooks will result in a loose ring that does not do a proper support job.

These rings dry out after some years because of the exhaust pipe heat and should be replaced when they no longer have any flexibility.

My car has both large and small rings.

Richard M, NYC

[Naj ✝︎]

Yes, Richard is right.
I found out the hard way.
The rings on the rear box are bigger than the ones holding the pipes about mid-ship.

naj

[jameshoward]

Opps. Apologies.

Probably explains why I had such a great time trying to get my exhaust on my car and why I can never get it off.

[ja17]

Hello,

Submerging them in very hot tap water for a few minutes before installation will make them more pliable and the water will lubricate lubricate the rubber for installation.

Mercedes actually offeres a chain re-enforced version for very severe conditions! I resorted to using these on my rallycar after breaking numerous sets of  standard rings.

The rear-most outside ring can be very difficult to install there is very little room to work between the muffler and the body. 

[BMWTom]

Okay, so I didn't see the smaller "O" rings amidship. I need the larger ones for the muffler but can not find them online. Dealer item?

Thanks 280SL71

[gzmavian]

They are available online from may suppliers.  However some suppliers only offer one size and a couple offer two sizes.  I have gone through this process myself recently.   By the way, when you check the various websites  look under "Exhaust systems" then make certain you try to locate MUFFLER HANGERS and EXHAUST HANGERS because here is where the size of the rubber hanger varies.  Good luck. 

[badali]

Call Tom Hanson at the Classic Center.  I bought the entire exhaust and hangers last summer 2 days before Blacklick.  The hangers and rubber rings are cheap but the pipes and muffler were not.  He is fast to ship.  I ordered at 2 pm and received the next morning in Pa

[BMWTom]

Problem solved. I bought a package off of ebay (then I found them on Autohaus for less. Woops.)

[abe280SL]

I went to a hardware store for my muffler hanger and bought stainless springs that I made a circle out of them close to the same diameter as the rubber.  It was a trial and error. Now I dont have to worry about the rubber drying up and rotting and having to be replaced.  My mechanic laughed at me when I did this..guess what..after many years they are holding up very well.
abe

[Larry & Norma]

Hi just taken the exhaust(muffler) off my '70 280SL to try and cure leaking joints. The rubber rings on the centre mounting appear to be larger than the rear two mountings.
Also i do not have any insulator plates installed (A0004920183). Can't see what they do unless they are just to keep heat from the rubber rings, although conduction through the metal is still going to happen. How does the centre one work? Anyone got these things installed?

[thelews]

I went to a hardware store for my muffler hanger and bought stainless springs that I made a circle out of them close to the same diameter as the rubber.  It was a trial and error. Now I dont have to worry about the rubber drying up and rotting and having to be replaced.  My mechanic laughed at me when I did this..guess what..after many years they are holding up very well.
abe

I believe the use of rubber is to insulate/dampen vibration and sound through the chassis.  Not so sure springs do that as well.