Chuck S

I did a coolant and brake fluid replacement a couple of weeks ago. Last done by the dealer 5 years and 20,000 miles ago.

The gravity brake fluid process worked well other than the left rear caliper where it barely dripped for an hour. Other cylinders got several ounces in 15 minutes. Car is braking just fine.

Any way to push/suck more clean fluid in this brake caliper?

-- Chuck

flanders

Use a pressure/vacuum bleeder or get someone to push the brake pedal.
Could be some junk or rust in the bleeder valve that restricts the flow.
5 years in use is a bit to long for brake fluid and it will have degraded a lot during that period.

EELPIE

When I did mine I started with the front right then the left front. Both fronts flowed well. With the left flowing the fastest

The rears were SLOW. I did both at the same time. They were so slow I had no fear of running the master cylinder dry.

Cannot think of a way to speed up the process. Using vacuum devices or two person bleeding speeds the process but you are not gravity bleeding anymore.

I like the firm pedal I get from gravity bleeding.

But it is painfully slow.

The ABS unit has something to do with the speed of the bleed.

Gravity bleeding my 1990 non ABS Miata takes no time at all.

Chuck S

Thanks, everyone. I think I'll try one of the vacuum devices to see what I can suck thru that line. (Now to determine which one.)

-- Chuck

Jah2000

Yeah, it's super duper slow. So much so, that I never wanna gravity bleed again.

I will prolly try those bottles with the built-in check-valve, the next time I need to bleed brakes.
(as I don't like running speed-bleeder valves on the actual brakes (had them in past cars)... just preference, as I like oem, more solid and simpler parts).

cenix

I always do a combo of both traditional brake pedal pump for all sides, then a good gravity bleed after. It's amazing how much air still comes out. Brake pedal is stiff and problem free.

Thomas Guide

Hey Chuck, I just got this as per recommended in the Honda manual for vacuum testing, engine testing and other stuff but it also comes with parts to bleed your brakes and some great instructions. I can't wait to use it to do my brakes in a month, the gravity bleed took me 4 hours last time on a work night, it was so slow I never want to do that again.

Part # YA4000B

You can buy a new one from Snap On (Bluepoint / Mityvac) like I did or pick them up on Ebay for half off. There are generic versions of this, and I have one of those too but it's of lesser quality. I really like the quality of this tool and the customer support guys are great.

Chuck S

Thanks for the recommendation. I'll investigate used (or Harbor Freight). Gravity bleeding my rear brakes too so long I gave up after a couple of hours. Very little drained out. I like the ability of these pumps to suck the old oil out of the brake and clutch reservoirs.

-- Chuck

engifineer

I have a motive pressure bleeder I have used on my other cars that works wonderfully. I need to make a cap for the S2k though as the adaptor I have does not fit well and thus will not hold pressure.

For the S2k, I have done it via the brake pedal. Came out nice and firm like every other car I have ever bled brakes on.

s2000ellier

https://www.speedibleed.com/vaf/prod...403&option=294

I've used this with success