Hose size for bleeding brakes
 

I’m flushing my brakes soon and need to know what size hose I need to attaching to the brakes.
Anyone know the diameter to get?

Thanks,
Shawn


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As long as it's flexible enough, I.D. isn't critical. I use large fuel tubing from a hobby store, it's usually about $1/foot and easy to source if you have a hobby store nearby that sells nitro cars/boats/planes/helis.

I'd also like to know tubing size needed for draining brake fluid and draining coolant from the radiator. Are we talking 1/16" ID is even fine if it's flexible? 1/2"? 1"? Just a ballpark answer is needed so I can get something before I take stuff off the car to get at it.

I imagine 1/4" is fine (I have some clear tubing I bought for brewing beer) but I haven't found measurements of the barbs anywhere, so don't know if they're a lot smaller or bigger than I'm expecting.

EDIT: Didn't bother searching for the radiator one, so I looked and found 8mm, but the brake flush guides don't mention a specific size.

For brakes I use the clear fish tank air line tubing. it is flexible enough you can pop it on nice and snug.

Needs to fit on the barb of the bleeder.

5/16” ID is what I ended up using. 1/4” was a bit tight to go on.


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Im doing my first flush next week, do you happen to remember what size flare nut wrench would be right for the job? (for the bleeder valve)

I think it is https://smile.amazon.com/ATE-706202-...omotive&sr=1-1 but Im not sure.

10mm

I've never used a flare nut wrench on the bleeder valve. The bleeder valve you can use a normal combo wrench on. The flare nut wrench is for the brake line fittings.

Bleeders have a tendency to round off, or worse yet, break off in the caliper. A good quality 6pt box end wrench is best if you have room to swing it.

Or break it loose with a 6pt socket, snug it back barely, the go at it with a combo wrench.

Shouldn’t have any space constraints with the wheels pulled off, I’m usually battling them from underneath with a rim right in the way. Mercedes get brakes bled every two years, we have a pressure bleeder running all day long.

Yeah, no need for a flare nut wrench on the bleeder, there's no hard line on it stopping you from putting a box end wrench or socket over it.


I always use a socket to break it loose and an open end wrench to open/close while actually bleeding (when the rubber hose is on), then final tighten with the socket again.

Just flushed mine a couple weeks ago. 5/16" tube and 10mm wrench/socket.
I installed SpeedBleeders which are 11mm.

Link where to buy the speedbleeders you installed? I'm not sure the size that our cars have. Thank you!

Speedbleeders
 

http://www.speedbleeder.com/


The type is SB1010 for our OEM calipers.
They come two in a package, so order two packs for a total of four bleeders. US$60.00