Club 80-90 Forums

just found this maybe of use to someone meant to be quite good for higher torque engines
http://www.nicoclub.com/archives/make-y ... s-how.html

Agreed but nice to know about Flexane - think of the rubber mounts and fittings you could make with that stuff.....

That's true... I could make some new feet for the bottom of me kettle!

Don't think that's quite what we had in mind though!

could you refill a perished mount with this stuff.

could you refill a perished mount with this stuff.

Doubt it..

Quality (VW) as opposed to marginally acceptable rubber bonded components, require excepional preparation and pre-treatments to garner long term life without de-bonding or premature perishing/solvent/hydrocarbon damage..

Case in point - GSF diesel silencer mounts, a few months on a syncro, maybe a year on a 2WD

VW diesel engine mounts (seem to) last about 15 to 20 years.. ?

Also the compliance has to be about right (and hysteresis loss too) to minimise NVH and suspend the mass at the correct natural frequency (that doesn't clash with dominant forcing (driving) frequencies)

HarryMann wrote:

could you refill a perished mount with this stuff.

Doubt it..

Quality (VW) as opposed to marginally acceptable rubber bonded components, require excepional preparation and pre-treatments to garner long term life without de-bonding or premature perishing/solvent/hydrocarbon damage..

Case in point - GSF diesel silencer mounts, a few months on a syncro, maybe a year on a 2WD

VW diesel engine mounts (seem to) last about 15 to 20 years.. ?

Also the compliance has to be about right (and hysteresis loss too) to minimise NVH and suspend the mass at the correct natural frequency (that doesn't clash with dominant forcing (driving) frequencies)

don't want any HYSTERICS from the dominant nagging driving force would we!

Gonna report this post for being way to edificated!!! (sure it made sense to someone somewhere!!)

Em
x

Hehe, maybe Emm

Perhaps wiseing up should be the new dumbing down

All redwords respond to a quick googling. Hysteresis is effectively a loss of energy (due heat generation) between extension and return of a compliant (springy) medium, that is, a non-perfect spring effect (but deliberately so) - thus a damping/dissipating effect. Stiffness inverse of compliance etc

Translation -
A factory rubber/metal bonding process is quite different to a home workshop one. Things like degreasing standards, temperature, humidity probably quite important.
Flexane is great stuff (was using it early 70's), quite expensive, and might well produce a 'get you out of trouble' fix
Unlikely to match stiffness without careful product choice and last anything like original factory item

Happy to b proved wrong as usual.

xx

Don't know about engine mounts but it gives you shiny toecaps on your best parade shoes (if I remember correctly).

er...........could I make condoms out of this stuff? They'd be very strong wouldn't they. Girls could make solid ones maybe

^^^^ me thinks you have strayed on to the wrong forum here.....wrong sort of technical help!!!

Hey Harrymann, do you think amongst the print on the tin it says "marginally acceptable rubber bonded component" - underneath 'do not inhale fumes'