Which brake fluid should I be using?

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fidget
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Which brake fluid should I be using?

Post by fidget »

Hi all

Going to be replacing the calipers this weekend and will need to bleed them, which brake fluid should I be using . I looked in the wiki but couldnt find anything , also managed to leave my haynes manual at work so cant check that either

thanks in advance


James
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AdrianC
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Re: Which brake fluid should I be using?

Post by AdrianC »

fidget wrote:Going to be replacing the calipers this weekend and will need to bleed them, which brake fluid should I be using . I looked in the wiki but couldnt find anything , also managed to leave my haynes manual at work so cant check that either

DOT4. It's the stuff that's easiest to get, anyway.

DOT3 is a lower boiling point.
DOT5 is silicone based, very difficult to bleed, and needs the complete system rebuilding before being used.
DOT5.1 is compatible with DOT3/4, but expensive and a bit unnecessary unless you're building something for track days. Which is certainly an interesting concept... <grin>

Don't forget to change it every two years, since it's hygroscopic, and absorbs moisture from the atmosphere - reducing the boiling point and causing internal corrosion of cylinders & calipers.
A year and a half living in a Westy hightop... http://www.WhereverTheRoadGoes.com" onclick="window.open(this.href);return false;

fidget
Posts: 126
Joined: 04 May 2010, 20:45
80-90 Mem No: 9027
Location: Braintree, essex

Re: Which brake fluid should I be using?

Post by fidget »

Thanks Adrian

Off up the road to get some now


thanks

James
If Pac-Man affected us as kids, we'd all be running around in darkened rooms, munching magic pills and listening to repetitive electronic music

Red Westie
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Re: Which brake fluid should I be using?

Post by Red Westie »

As he said....DOT 4....starting from the furthest wheel from the master cylinder (thats the N/S/R on a R/H/D) then O/S/F then N/S/F finishing with O/S/F. About a litre should do it.
I tend to revisit the first cylinder (because the fluid was the old stuff in the resevoir) and give it a few extra pumps at the end to ensure it's new fluid is coming through, makes sense if you think about it.

Martin
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