Reply To: Brake fluid

[BernieParticipant]

No!

I have used silicone in my Tractions for many years and have not experienced any problems myself.  Nevertheless, I have heard a couple of tales of people who did have problems similar to those of Phil (above).

I have personally converted two systems, making the change from ornery stuff to silicone.  On the first occasion (in the early ’90s) I was rebuilding a Light 15 for a friend.  The pipework was flushed but all 5 cylinders were brand new and, although they had not seen any other fluid, they were dismantled and all the seals rinsed and then coated with the new fluid before fitting.  Having a small drop of fluid inside the dust boots minimises the chance of atmospheric moisture attacking areas of the pistons and cylinders which are not permanently immersed in fluid.

The second was my own Légère.  In light of the successful experience with the Light 15, I made that change shortly afterwards.  That time the whole system was flushed thoroughly and, although the actual cylinders were not changed, all the seals in the master and all four wheel cylinders were replaced with new parts and “wetted” before introducing the silicone fluid.

My experience was that the pedal was very firm on both cars. Te Light 15 is still with the same owner and the brakes have never been a problem .  The Légère brakes were still fine when I finally sold it in 2016.

The 15/6 was already on silicone when I bought it in 2016 .  Had I not been assured all the cylinders had been replaced, I would have checked them myself and, if nothing else, I would have replaced all the seals as a priority.  Again, the pedal is firm and the brakes are very positive.

Based on my own experience, I think the answer very probably lies in ensuring all components are clean and in perfect condition from the offset.  Assuming this precaution is taken, I have no hesitation in recommending the use of silicone brake fluid.

Finally, in addition to the two advantages mentioned by Chris, I reckon there is a third …. as he says, the silicone fluid is non-hygroscopic and does not absorb moisture from the atmosphere so, unlike the ornery stuff, it will not need to be changed every couple of years (especially if the vehicle only covers a low annual mileage).

B…………