So far as I know there is only one company that is reproducing engine mounts
for our cars, and they are not being made in China. What I have bought from
them has been the highest quality. Unfortunately, I forgot to look in my pile
of stuff at the office to post the name of the company, as I suggested that I
would this morning. I do believe that they may be listed on the Web site as a
parts supplier. I keep thinking that their name is King, or Royal, or maybe
even Imperial...anyone out there know who I am trying to think of here?
Paul
In a message dated 4/2/2004 12:21:16 PM Eastern Standard Time,
daveford1@xxxxxxxxxxx writes:
>
>
> Most of the rubber components installed for isolation purposes such as
> powertrain mounts and body mounts but are a natural rubber compound (good
> mechanical, temperature performance and low damping for good isolation).
> It is comprised mostly of material harvested at plantations of rubber trees
> located in good geographic growing areas like Malaysia. It is then
> compounded depending on application, with various small powders and carbon
> blacks and typically sulfer or peroxide is uased as a cure agent. Then it is
> cured and mold bonded to the metal brackets (molded at higher temps for
> specific times). The OEM parts go through extensive testing in climatic
> chambers (temp cycles, ozone, durability, fatigue corrosion/bond failure
> etc.) and are tweaked to pass specific verification tests as decribed in the
> DVP&R (design verification plan and report). Sometimes they are a synthetic
> such as EPDM but typically you give up one or more of the basic desireable
> properties that Nat_Rubber has. They do age and crack fail and there is no
> way to stop that process, but it can be slowed down with quality materials
> and processing. When you buy an aftermarket replacement from China for $10
> you should probably buy a dozen if you plan on keeping the car. Though they
> do have a shelf life so a high quality part that has been sitting for
> several years is not going to perform as a new part.
> My LHS mount kept failing on my 400+ hp XXXX Replica (been scolded for using
> non-Imperial vehicular designations on this site and I don't wanna get my
> mouth washed out with soap for a second offense) car so I wrapped a length
> of cable around it and welded it together with my trusty Henrob (do not get
> the mount of the surface that it is molded to hotter than ~275-300 degrees
> and so far it seems to work fine (cars in winter storage but it did make it
> there with no problem eh)..
>
>
> >From: DONALDDICKINSOND@xxxxxx
> >Reply-To: mailing-list@xxxxxxxxxxxxxxxx
> >To: mailing-list@xxxxxxxxxxxxxxxx
> >Subject: Re: IML: bonding rubber -- age issues
> >Date: Fri, 2 Apr 2004 09:12:59 EST
> >
> >I am under the impression that rubber (which in most cases is really a
> >synthetic compound) is due to the loss of plasticizers causing brittleness.
> > This
> >can be slowed considerably by treating, on a regular basis, with
> >vinyl/rubber
> >conditioners to replace these plasticizers (same for vinyl covered dashes
> >etc).
> >You chemists on the list what say you?
>
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