For those who bleed via the pedal pump method: How many pumps?

[sugarwood]

Since there is no blue fluid, the old and new fluid is the same color, and I can't tell when all the old fluid is out.

Does anyone have an estimate of how many pedal pumps it takes to purge the rear lines?

For the rear, I think I did 15 open/close pump cycles.
For the fronts, I did like 8 cycles. Seems reasonable?

[Oh Haha]

I don't believe there is a certain number of pumps. I had to bleed my system a few times to get a good, firm pedal. It all depends on how much air is in the system.

If the pedal is firm and you can stop, you're done.

[HarryD]

I pressure bleed my brakes. When I did it using the blue/gold fluid, I found that about 200 ml per cylinder gave me a color change. A bit more in the back, a bit less in the front. I would think the foot pump method would use about the same amount.

[DRACO A5OG]

Just make sure you place a block behind the pedal to insure you do not push all the way down, it could damage the MC because it goes past the usual wear limit, it could tear the seal.

As far as pumps, as much as it is needed, you will find a way that will satisfy you. I like to syphon the old fluid in the beginning, then put fresh fluid and flush until it goes to low level and repeat then move to the next caliper starting from the passenger side rear. Then I do it one more time for safe measure.

I always order two large cans of fluid, better to have extra then run out.

Most important is the blocking of the pedal then not opening the bleed valve too far as to allow air in via the threads ( to helps this, put some di-electric grease around the threads ), I like to insure I do not go more than 1/8th turn and the clear hose above the caliper so I can insure all air bubbles are getting up and out then to the catch bottle.

Just be meticulous.

[3literpwr]

I have used this for the last 13 years. One of the best tools I've bought. Honestly, the pump method never yields the same results in anywhere near the time.

Amazon.com: Motive Products Power Bleeder Adapters to fit most European car models: Automotive

[sugarwood]

I used about half of the liter can of ATE.
There were no air bubbles to gauge since the fluid was changed 1 year ago.
I told my helper not to go all the way down, but only 3/4.
Yea, I only turned the bleed enough to basically crack it, probably about 1/8 turn.
I also closed the bleeder each time before helper released the pedal.
The actual bleeding part only took about 1 minute per wheel.

[DRACO A5OG]

Well, I think you are good to go

[sugarwood]

Those brake lines are really thin.
I think a 3/4 pedal pump might equal 1" in fluid travel.
If so, I think it' safe to say 15 pumps is good for the rear, and 5-8 pumps for the the front.

[Bob Kontak]

Originally Posted by sugarwood

I think a 3/4 pedal pump might equal 1" in fluid travel.

One foot, right? Not one inch.

Seems reasonable.

[sugarwood]

[Cory M]

Originally Posted by 3literpwr

I have used this for the last 13 years. One of the best tools I've bought. Honestly, the pump method never yields the same results in anywhere near the time.

Amazon.com: Motive Products Power Bleeder Adapters to fit most European car models: Automotive

I agree completely. Bought mine for $40 10+ years ago, still going strong. I've bought a few different caps and have used it on several cars. Never lets me down. Also makes it a 1 man job.

[Bob Kontak]

Spinal Tap......

It's not your job to be as confused as Nigel.

Bwa ha ha ha

[Rawknees'Turbo]

You guys who use the pedal pump method are really weird - 15psi of air supplied to the master res vent spout with a compressor and the entire system is bled of air, from a completely empty state, in about 20 minutes (working solo and slowly) - no pumps to count, repeated opening and closing of bleeder screws, getting in and out of the car, etc. You're all welcome!

[PCA7GGR]

"Pump 1-2-3 and hold." Open bleeder and repeat until:
- Old yellow fluid turns blue or
- old blue fluid turns green.

[JRSIII]

I'm having a bit of trouble with this miniature bread.

[LJ851]

I got a case of super blue but it's nothing like the blue ***** rawknees has.

[Rawknees'Turbo]

^^^

A while back (when brother Bob's Targa had a functioning front end), I treated him to a case of "blew by you" on one of the Akron interstates! Good thing I didn't have a keg of 'Stones on board, though, or even big boosting might not have been enough for me to get away!!!

[LJ851]

Originally Posted by Rawknees'Turbo

You guys who use the pedal pump method are really weird - 15psi of air supplied to the master res vent spout with a compressor and the entire system is bled of air, from a completely empty state, in about 20 minutes (working solo and slowly) - no pumps to count, repeated opening and closing of bleeder screws, getting in and out of the car, etc. You're all welcome!

Truth, eat a sammich while you bleed your brakes. It's hard to go back from a pressure bleeder.

[afterburn 549]

Push a clear hose over brake nipple , other end goes in a clear bottle with enough fluid to cover the end.
Now you can see the bubbles and when to stop pumping ..
Use a stick to push the peddle dwn and you watch the other side from a kneeling or squatting position.
(looking under the car )

[sugarwood]

Originally Posted by sugarwood

Those brake lines are really thin.
I think a 3/4 pedal pump might equal 1" in fluid travel.
If so, I think it' safe to say 15 pumps is good for the rear, and 5-8 pumps for the the front.

Going to do my annual bleed.
Since there will be no air bubbles, it's impossible to know when the old fluid is out.

I will do my 15/8 count, as noted above.
I think I arrived at that estimate by watching the fluid in the nipple hose.