Quick brake bleeding question
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From: Wagener, SC
Quick brake bleeding question
I looked on the internet, and searched here and read about 30 threads, but I didn't see a mention/answer to this peticular question:
When doing the two person brake pedal pushing method to bleed brakes, what is the approx number of pedal pushes for the outward rear brake line before I can start looking for the new fluid?
I just didn't want to go through a quart of fluid and 100 pushes when 10 pushes would of done the job. Just a rough guesstimate will suffice....
Thanks!
When doing the two person brake pedal pushing method to bleed brakes, what is the approx number of pedal pushes for the outward rear brake line before I can start looking for the new fluid?
I just didn't want to go through a quart of fluid and 100 pushes when 10 pushes would of done the job. Just a rough guesstimate will suffice....
Thanks!
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From: Mobile, Alabama
I hope this answers your question as there is no way to determine the actual number of times you will need to pump and bleed. It is determined by watching for no air bubbles and clear brake fluid.
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From: Wagener, SC
New master cylinder, new drums, rotors, calipers, wheel cylinders, pads, shoes, all new brake hardware/springs.
One less system to worry about. I don't think the brake system was EVER serviced by the po. Soft lines look good though.
Problem is, everything has been leaking so bad, and for so long, I don't think there is any old fluid left in the lines. I just want to make sure I don't stop short in bleeding the rear, and leave air in the lines. That would sort of negate the $300.00 I spent on brake parts today.
One less system to worry about. I don't think the brake system was EVER serviced by the po. Soft lines look good though.
Problem is, everything has been leaking so bad, and for so long, I don't think there is any old fluid left in the lines. I just want to make sure I don't stop short in bleeding the rear, and leave air in the lines. That would sort of negate the $300.00 I spent on brake parts today.
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From: Mobile, Alabama
Hopefully you have bench bled the master cylinder and if not you will need to remove it and perform this operation to save you lots of problems. It will require a lot of brake fluid to fill all the new wheel cylinders and calipers. Just remember to keep the master cylinder full to avoid filling the system with air.
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From: Denver Metro Area, CO
Great point!
Yes, very important to do that....
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From: Virginia
I do know to get a air pocket purged from the rear-most line, you need near the amount of fluid the reservoir in the master cylinder will hold. So if you bleed it till you have about half the fluid left, fill it back up and and bleed it till about half is gone again, that will be about right for replacing all the fluid to the rear most wheel cylinder.
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Posting Guru
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From: Wagener, SC
Hopefully you have bench bled the master cylinder and if not you will need to remove it and perform this operation to save you lots of problems. It will require a lot of brake fluid to fill all the new wheel cylinders and calipers. Just remember to keep the master cylinder full to avoid filling the system with air.
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From: Wagener, SC
I do know to get a air pocket purged from the rear-most line, you need near the amount of fluid the reservoir in the master cylinder will hold. So if you bleed it till you have about half the fluid left, fill it back up and and bleed it till about half is gone again, that will be about right for replacing all the fluid to the rear most wheel cylinder.
Perfect! That's what I was looking for. Gives me a point of reference.
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Get yourself a mighty vac... Start at the right rear wheel... Once the pump pulls with no air bubbles move to left rear do same then right front finishing with left front...
If you didn't bleed the mc... You either need to pull it out or bleed it by slightly cracking the lines that connect to the master...
Good luck
If you didn't bleed the mc... You either need to pull it out or bleed it by slightly cracking the lines that connect to the master...
Good luck
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Posting Guru
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From: Wagener, SC
You're kidding, right? If my wife found out I bought something to accomplish what I could of done with my foot FOR FREE, I'd never need brakes again!!
But really, thanks for the suggestion.
But really, thanks for the suggestion.
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You can actually borrow one for free from auto zone.... As for cheaper doing it by pumping the pedel... Well for that you need a friend... And most friends(at least mine) need beverages... So you got a six before you start.. A six while your doing it and at least a case when your done to celebrate a job well done..
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From: Wagener, SC
Ha!! Know what you mean. That was my going rate "back in the day", whenever a friend asked me for help. I was easy, especially after the second six.
Now a days, that's what kids are for. I had 7, just to make sure at least one was available...
Now a days, that's what kids are for. I had 7, just to make sure at least one was available...
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Posting Guru
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From: Wagener, SC
I do know to get a air pocket purged from the rear-most line, you need near the amount of fluid the reservoir in the master cylinder will hold. So if you bleed it till you have about half the fluid left, fill it back up and and bleed it till about half is gone again, that will be about right for replacing all the fluid to the rear most wheel cylinder.
Quick question. Why are the rear brakes on the small reservoir? With the length of the lines and all, I would think that you would need more fluid available to service the rear. The front lines are a short run, but are on the large reservoir. How come?
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From: Denver Metro Area, CO
Because the front brakes supply 80% of the stopping action of the brake system as a
whole, the extra fluid is a "just in case" buffer and provides for them working for a longer
amount of time in the event of leaks (which should be discovered during periodic
maintenance).
whole, the extra fluid is a "just in case" buffer and provides for them working for a longer
amount of time in the event of leaks (which should be discovered during periodic
maintenance).
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From: Charles Town, W bygod Va
Its actually because of the volume of fluid needed to fill the calipers when the pads wear. The wheel cylinders require less of course because of the diamater of the piston. You shouldnt need to top off the fluid unless you have a leak, when the reservoir for the frt is low it tells you your pads are worn.