REGARDING Silicone Fluid & Car Shuddering
John Ross wrote:
> brake pads jammed against the disk.
> using silicone brake fluid and I've heard rumors that it can cause the seals
to swell.
I've heard this rumor, too. I believe it to be unfounded.
Your seals are probably made of one of three elastomers, ethylene propylene
(aka EPM or EPDM), isoprene (IR or NR), or styrene butadiene (SBR, Buna S or
GRS), all three of which are rated #1 satisfactory in silicone fluids; that's
according to an elastomer handbook put out by the Parker O-ring company.
Silicone rubbers such as RTV sealants and Silastic WILL absorb silicone fluid,
causing swelling and softening. Maybe that's where the rumor came from.
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Don Mathis wrote:
> When I back up in the Bentley, the car shutters.
> when I back up in the MGA, there's a tendency to shutter.
When my XJ12 shuddered in reverse it was a bad gearbox rubber mount.
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