[Healeys] Engine Mounts

[Simon Lachlan]

I swear I’ve looked at some of these things – exhaust mountings, if I had to commit – and the rubber was splitting away from the metal because the metal was painted. So the adhesion was no better than the paint to metal bond. That can be pretty good, but if it isn’t and it just turns into a flakey mess..............

Simon

 

From: Healeys [mailto:healeys-bounces at autox.team.net] On Behalf Of michael.salter at gmail.com
Sent: 13 November 2016 17:35
To: David Porter; healeys at autox.team.net
Subject: Re: [Healeys] Engine Mounts

 

Hi Dave,
Not sure how relevant this is but I have noticed that most rubber to steel bonding seems to start at the edges, particularly on original components. 
I am inclined to believe that a large contributing factor in the steel to rubber bond is actually caused by corrosion of the steel.
Also usually it seems that the oxidation of the rubber is a quite thin layer and the underlying rubber is still in perfect condition although very old.
Of course this is not always the case as very deep cracks in the engine mount rubber blocks are not uncommon. 
Just my observations. 
Michael S 
BN1 #174
With original BSF thread engine mounts..

Correct diagnosis is half of the repair.





On Sun, Nov 13, 2016 at 11:20 AM -0500, "David Porter" <frogeye at porterscustom.com> wrote:

Rubber continues to vulcanize throughout it's life time. As such it hardens and shrinks and eventually pulls the adhesive away from the mounts. Perhaps, one could use the new body panel epoxy's to reattach the rubber, but you would still have a very hard rubber buffer....

dp

 

On 11/12/2016 5:24 PM, WILLIAM B LAWRENCE wrote:

The current thought is that rubber ages as well as being detrimentally affected by UV and environmental ozone. As such we are told not to use tires that are over six years old. I think the same thing happens to other rubber parts as well. I've installed rubber plugs and grommets on my BN1 that deteriorated with 6 months of installation. For that reason I won't buy "NOS" rubber parts and I think any new rubber parts should be date coded.

  _____  

From: Healeys  <mailto:healeys-bounces at autox.team.net> <healeys-bounces at autox.team.net> on behalf of Bob Spidell  <mailto:bspidell at comcast.net> <bspidell at comcast.net>
Sent: Saturday, November 12, 2016 2:24:11 PM
To: Healeys
Subject: [Healeys] Engine Mounts 

 

The engine mounts on my BJ8--whose engine I am overhauling--had the 
rubber part separating from their metal backing.  This didn't surprise 
me, as they have 25+ years and 120K+ miles on them. However, I got under 
the BN2 the other day and noticed its mounts were separating as well, 
and these only have a few years and a few hundred miles on them.   
Apparently--like most rubber or rubber/metal parts from contemporary 
suppliers--they are crap. Anyone know a source for quality, durable 
engine mounts for Big Healeys?

TIA,

Bob

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-- 
Dave Porter Porter Custom Bicycles 2909 Arno St. NE Albuquerque, NM 87107 505-352-1378 Go HERE: my world www.porterbikes.com/ 

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