Brake Fluid question
Brake Fluid question
Author
Discussion

wotnoburgers

Original Poster:

149 posts

131 months

Tuesday 31st January 2017
quotequote all
Hi All,

Silly question?

Can you use silicone brake fluid in an Aston? I have a V8 Vantage and due a change. Other cars I have have silicone fluid but not sure if you can in the AM??
Any comments welcome

Thanks
Dave

telum01

987 posts

146 months

Wednesday 1st February 2017
quotequote all
Definitely don't use silicone based brake fluid.

davek_964

11,350 posts

206 months

Wednesday 1st February 2017
quotequote all
By coincidence, I was discussing my next service with an independent yesterday and was told that the brake fluid is changed every service - I.e annually. Is there a reason yours isn't being done as part of the normal service?

Big Ry

1,682 posts

150 months

Wednesday 1st February 2017
quotequote all
davek_964 said:
By coincidence, I was discussing my next service with an independent yesterday and was told that the brake fluid is changed every service - I.e annually. Is there a reason yours isn't being done as part of the normal service?
For some reason it seems that the first and third services on a V8 do not include a fluid change (I guess it's not required).


davek_964

11,350 posts

206 months

Wednesday 1st February 2017
quotequote all
I just spoke to an Aston dealer and discovered Aston have changed the service matrix for the older cars to bring it inline with the newer ones.
So my 10 year service is basically just an oil and filter change - if I want other stuff done (brake fluid, coolant, pollen filter etc) then they have become 'add on options'. 6 months ago, the service would have cost almost twice as much, but included almost twice the work.

Ken Figenus

6,011 posts

148 months

Wednesday 1st February 2017
quotequote all
That sounds like progress and common sense! I seriously doubt brake fluid needs changing annually in an Aston as my DD is very similar in weight/performance and the same brake fluid lasts 3 years. The 'car' isnt more hygroscopic is it?! But BMW do want to change the 'all important' cabin microfliters at every service at £180 eekrolleyes Wish they would all see their customers more as people rather than turnover prospects!

wotnoburgers

Original Poster:

149 posts

131 months

Wednesday 1st February 2017
quotequote all
telum01 said:
Definitely don't use silicone based brake fluid.
Hi all,
thanks for the comments so far
Could I ask why Silicone Brake fluid cant be used?

Thanks

Buster73

5,635 posts

184 months

Wednesday 1st February 2017
quotequote all
I can't remember brake fluid being changed as a service item till relatively recently as in the last five plus years.

The cynic in me just thought it was another revenue stream for garages.

wotnoburgers

Original Poster:

149 posts

131 months

Wednesday 1st February 2017
quotequote all
Ah,
A bit of googling!!

Is it something to do with the ABS?

Please let me know as I am curious

many thanks

telum01

987 posts

146 months

Wednesday 1st February 2017
quotequote all
silicone brake fluid isn't compatible with what we use, so if there's any in the system it can turn to gel. it's easily aerated, so you have to be extremely careful about how you fill the system to avoid air getting in. plus it isn't compatible with ABS systems, which is a dealbreaker on its own.

jeyjey

221 posts

128 months

Wednesday 1st February 2017
quotequote all
I think brake fluid changing wasn't such a big deal 20 years ago because by the time your brake lines were rusted out the car was ready for the scrap heap anyway.

Brake fluid absorbs water from the atmosphere, whether the car is driven or not. In California or Nevada I might go 4 years between changes, but here in Ireland I wouldn't go more than 2.

Cheers,
Jeff.

yourtheguy

146 posts

176 months

Saturday 4th February 2017
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OMG that's mine screwed then.
I had to replace an ABS unit about 2 years ago due to corrosion in the unit caused by water as the fluid had not been changed.
After spending £1300 I decide to go down the silicon route and have not had any problems as yet ( that's probably jinxed it).
I can't see why it would do anything to the ABS the only thing I would think is to attack the seals, but as it said on the bottle it will work with any system that uses DOT4.
Hope this helps a little.

Cheers Simon.

F1NDW

411 posts

182 months

Saturday 4th February 2017
quotequote all
yourtheguy said:
OMG that's mine screwed then.
I had to replace an ABS unit about 2 years ago due to corrosion in the unit caused by water as the fluid had not been changed.
After spending £1300 I decide to go down the silicon route and have not had any problems as yet ( that's probably jinxed it).
I can't see why it would do anything to the ABS the only thing I would think is to attack the seals, but as it said on the bottle it will work with any system that uses DOT4.
Hope this helps a little.

Cheers Simon.
Are you sure your not confusing silicon and synthetic here?

Gavc

226 posts

164 months

Sunday 5th February 2017
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I have a small diagnostic tool that indicates the water content of brake fluid. I change when it gives me the indication to do which is around 3% absorbency. Which works out about every 3 yrs, to change every year is just another money making add on at the garage.

Prattking

41 posts

173 months

Sunday 5th February 2017
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My DB7 Vantage was converted to Dot5 silicon fluid in November 2014 and had no problems so far. The system has to be flushed through with new fluid as it must be all silicon but evidently silicon does not attract water.

DB9VolanteDriver

2,661 posts

207 months

Sunday 5th February 2017
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Prattking said:
My DB7 Vantage was converted to Dot5 silicon fluid in November 2014 and had no problems so far. The system has to be flushed through with new fluid as it must be all silicon but evidently silicon does not attract water.
True, so the boiling problem goes away, but since it doesn't absorb water, any water that does get in collects and can cause corrosion in the calipers. It also tends to give a slightly softer pedal. It is great for older collector vehicles that aren't used much, esp motorcycles, since spills won't take paint off.