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Bleeding brake and clutch lines

Posted: Sat Jun 09, 2018 10:45
by DavidOliver
I have recently been bleeding brake lines. Being used to a two man job, pedal pusher and bleed screw operator, and now being a lone operator, my wife is not a Lotus fan and less when she is asked to sit in the driver seat, I got hold of a pressure bottle type. This can provide some interesting puddles of wasted fluid around the engine bay and loss of large quantities of expensive brake fluid.
I then discovered the suction equipments and found I can still get air bubbles in the clear plastic bleed line even with the nipple closed. Air leaking in around the pipe/nipple connection-

I ask Forum Members for their preferred method for fluid bleeding.
How does a car manufacturer bleed brakes on a new car?

Dave the cog.

Re: Bleeding brake and clutch lines

Posted: Sat Jun 09, 2018 13:48
by Phantasm
Here is a method...
https://youtu.be/ag-Q_lP0dOk

Re: Bleeding brake and clutch lines

Posted: Sat Jun 09, 2018 16:35
by Alan_M
Being another lone worker, I use a Sealey pressure bleeder. I originally bought this as my daily driver could only be bled with a pressure bleeding system.

You should not be getting any pools of fluid in the engine bay if all seals are good.

When I initially connected it to my Excel and pressure tested ( without fluid in the bleeder, as per instructions) I had a leak between the reservoir and the master cylinder. This was due to the rubber washer nearest the bulk head being a poor seal - a bit old and tired I suspect. I removed the reservoir cleaned everything up and added an additional rubber washer between top of master cylinder and base of reservoir. This gave an air and fluid tight seal.

Re: Bleeding brake and clutch lines

Posted: Sat Jun 09, 2018 18:15
by Pete Boole
I'm another user of pressure bleeders - I've been using the same Gunson's "Easibleed" for about 20 yrs - used it dozens of times. You do have to get the seals right though!

Pete

Re: Bleeding brake and clutch lines

Posted: Sun Jun 10, 2018 07:49
by Lotus-e-Clan
I've used Gunsons easy bleed but prefer to use a simple clear well-fitted hose with a non-return valve with the end dipped into a jar of fluid. This way I do the pumping - making sure I let the pedal return very slowly on the last stroke. Then I only nip the bleed screw IF the clear hose show no sign of bubbles. Works for me anyway - you need a good non-return valve and you should only open the nipple the minimum to get flow.

Re: Bleeding brake and clutch lines

Posted: Sun Jun 10, 2018 15:47
by bash
I use a gunsuns easybleed but beware of the cap, I had one blow off and shower the car with brake fluid luckily I got it all off in time before any damage. I now put tie wraps over the cap as a safety measure but it works fine.

Bash

Re: Bleeding brake and clutch lines

Posted: Sun Jun 10, 2018 16:04
by MrCoolA
Pressure bleeder every time. Changed and upgraded all my brakes and never had any issue with it. Just take your time.

Re: Bleeding brake and clutch lines

Posted: Tue Jun 12, 2018 12:10
by tonypoll
I too use Gunsuns Easybleed. Works just fine - if you get the cap on tight!