[Mgb-v8] Bushings

[Dodd, Kelvin]

Barrie.

The critical thing is that the outer bush has to be a precise fit to the
ID of the tube it is pressed into, so the rubber can bond to the metal.

The next important thing is that the steel sleeve on the ID of the
bushing is clamped correctly by the fastener so it cannot rotate.

There were a number of MGB V8 bushings on the market a while ago that
had inner steel sleeves that were too short and were not clamping
correctly. It's not readily evident when you install them that they are
not clamped, so it's always a good idea to measure the sleeve and
compare it to the locating mounting points to ensure that it can be
clamped correctly without bending the locating tabs.

The same holds true for Poly bushings that use a steel sleeve. The
sleeve must be correctly trimmed to it is securely clamped in location.


It would probably be worthwhile looking at a soft Polyurethane for this
application, since you don't run the risk of an incorrectly specified
rubber bushing shearing under too much load.

Superpro in the UK made up Watts Linkage and trailing arm bushings for
the Rover SD1 application that are a pretty low durometer Poly that
should not transfer too much vibration to the bodyshell.

I havn't tried them yet (too lazy) but they are reputed to work well.


kelvin



> -----Original Message-----
> From: mgb-v8-bounces at autox.team.net
> [mailto:mgb-v8-bounces at autox.team.net] On Behalf Of Barrie Robinson
> Sent: Friday, August 07, 2009 1:40 PM
> To: mgb-v8 at autox.team.net; mgs at autox.team.net
> Subject: [Mgb-v8] Bushings
>
> I need some really hard engineering advice here.
>
> I have Panhard rod and rear axle location bars on my 1955
> Aston Martin - okay, okay it is not an MG - but it does live with
> one!!!   At the end of these struts are "eyes' into which are pressed
> Silent Bloc bushings.  Then a bolt goes through and into a bracket -
> voila !    Replacement of these S B bushings are over $100 each.  I
> wonder if these can be replaced by those bushings we use on
> our suspensions - provide they fit ???  Has anyone had
> experience or had knowledge of Silent Bloc
>
> Regards
>
> Barrie Robinson
>
> 705-721-9060 (Canada)
> MGB GT V8
> Aston Martin DB 2/4 MkII in the wings
> http://www.britishv8.org/MG/BarrieRobinson.htm            TRY
> www.britcot.com - a unique web site for car goodies