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Changing from Silicone brake fluid to regular brake fluid.


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JakeT
New User

Oct 11, 2015, 6:44 PM

Post #1 of 6 (1210 views)
Changing from Silicone brake fluid to regular brake fluid. Sign In

Hi all,
I have a street rod that has a Silicone brake fluid in the system. I want to change it over to standard brake fluid. My question is: can I flush out the Silicone with the fluid Im replacing it with or do I need to flush it out with a solvent first?

What brake fluid should I use?
Thanks;
JakeT


Tom Greenleaf
Ultimate Carjunky / Moderator
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Oct 11, 2015, 8:03 PM

Post #2 of 6 (1201 views)
Re: Changing from Silicone brake fluid to regular brake fluid. Sign In

Read containers. Should be DOT 3, 4 and DOT 5 should be synthetic. Difference is higher boiling points if pure and DOT most are not hygroscopic meaning "water/moisture" absorbing which maintains higher boiling points but promotes rust in low areas as some moisture collects and doesn't with the first two.


I think all are compatible but you end up with properties of the lower # one which is the most common. I would want the change to be complete anyway to get any type of old fluid out is better than mixed or old stuff. Pay total attention to use only fluid meant for brakes! It's not an oil at all!


T



kev2
Veteran
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Oct 12, 2015, 7:54 AM

Post #3 of 6 (1190 views)
Re: Changing from Silicone brake fluid to regular brake fluid. Sign In

why is the change necessary?
time hassle expense etc..... I can not see a reason to go this route......
KISS -


Tom Greenleaf
Ultimate Carjunky / Moderator
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Oct 12, 2015, 8:18 AM

Post #4 of 6 (1187 views)
Re: Changing from Silicone brake fluid to regular brake fluid. Sign In

Good point Kev! Why? I haven't messed with changing to higher DOT #s and can't imagine a difference noticed just that it claim a higher boiling point. IMO if fluid is really boiling lines or a brake problem is at hand to fix and DOT3 would boil faster and faster yet if exposed to water/moisture + not much. 1-2% moisture you lose well over 100F of boiling point maximums,


T



kev2
Veteran
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Oct 12, 2015, 12:59 PM

Post #5 of 6 (1179 views)
Re: Changing from Silicone brake fluid to regular brake fluid. Sign In

SILICONE dot5 IS an improvement over dot 3 and 4....


price is higher BUT its like blood pretty much should last a livetime a topping off maybe but cost is low compared to the suggested swap


Tom Greenleaf
Ultimate Carjunky / Moderator
Tom Greenleaf profile image

Oct 12, 2015, 1:13 PM

Post #6 of 6 (1176 views)
Re: Changing from Silicone brake fluid to regular brake fluid. Sign In

Never used it Kev + never required on anything I've dealt with. Was told it's all you just said, better at everything BUT as said doesn't absorb humidity/water/moisture so will (was told by dealer of this) puddle like water under gas would and rust right there if not changed out on a schedule.
IDK - any type should probably be bled out clean and new periodically but it's not listed as a routine thing that I know of? I should do more on my own I've owned them all so long it's not funny anymore and did silicone grease all the lines and bleeders knowing I'd be there some day and they'll work! Any when I'm there do that too, T







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