6pack friends,
I have also used silicone in my hydraulic systems for almost 8 years with
no detrimental effects. The only thing I can't explain is why the purple
brake fluid eventually turns brown despite all the components having been
renewed when the switch to DOT 5 was made.
However, my point in replying is to urge the experts in this group to
figure out why Jerry Shaw's brake system failed. The majority seem to
concur that it wasn't caused by silicone, but I'd like to learn what then
caused Jerry's problems. Jerry, perhaps if you would provide more details
about the brake problems you experienced someone might come up with
alternative explanations.
Best to all,
Bob Fabie
'75 TR6
On Sat, Feb 9, 2013 at 6:20 PM, Glenn Franco <gaf3@charter.net> wrote:
> I spent the last 8 years of my career in Brake Engineering with TRW
> (owns Lucas) as my supplier.
> There are a multitude or reasons why they will not warranty components
> that use Dot5
>
> * All their bench durability and life testing is primarily done with
> DOT 3 or 4
> * DOT 5 is not Hygroscopic and does not absorb moisture
> * All Fluid boil tests are done with DOT 3 or 4 with max H20 absorption
> * Field testing in Death Valley is done with DOT 3
> * The legal staff probably warned them against it.
>
> That being said I have used Silicone DOT 5 in My TR6 for the past 4
> years with no problems or lifted paint.
>
> With any fresh brake builds I use Silicone DOT 5.
>
> Just my 2 cents worth
> Glenn
>
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