Does One Effect The Other?
01-27-2014, 09:59 AM
#1
Racer
Thread Starter
Does One Effect The Other?
I'm in the process of installing a new clutch master & slave cylinder along installing new shocks at all four corners. With the understanding I will be replacing the front struts I need to either disconnect the brake line to free it from the strut or cut the brake hose retainer on the strut to release it. I will need to bleed the clutch after I install the new master & slave cylinders, will I also need to bleed the brake lines even if I do not disconnect the brake lines? I ask this because if I do, I'll just discount the brake lines instead of cutting the retainer.
Thanks
Thanks
01-27-2014, 10:39 AM
#2
Rennlist Member
Good question. I am getting ready to install new brake lines myself and hope you don't mind me piggy backing on your question but if you do bleed all lines, when do you bleed the slave cylinder? i.e. where does it fit in with the standard rr-lr-rf-lf sequence?
01-27-2014, 12:22 PM
#3
Rennlist Member
Both systems feed from the same reservoir, but that is where the interconnectivity ends.
If you look at your brake fluid reservoir, you'll see the clutch line exits the middle rear wall of the reservoir, while the brakes feed off of the bottom. The idea is that in the event of a clutch fluid leak, you'd still have fluid in the reservoir to operate the brakes since it draws from a lower point in the reservoir.
If you do not open the brake lines, you do not have to re-bleed them when replacing clutch hydraulic components. If both systems have been opened I would bleed the brakes first, and then the clutch. But, as long as you don't manipulate the clutch pedal while the reservoir is out of fluid, it doesn't really matter which is bled first.
If you look at your brake fluid reservoir, you'll see the clutch line exits the middle rear wall of the reservoir, while the brakes feed off of the bottom. The idea is that in the event of a clutch fluid leak, you'd still have fluid in the reservoir to operate the brakes since it draws from a lower point in the reservoir.
If you do not open the brake lines, you do not have to re-bleed them when replacing clutch hydraulic components. If both systems have been opened I would bleed the brakes first, and then the clutch. But, as long as you don't manipulate the clutch pedal while the reservoir is out of fluid, it doesn't really matter which is bled first.
Last edited by jstyer; 01-27-2014 at 12:25 PM. Reason: Edited for clarity.
01-27-2014, 02:28 PM
#6
Rennlist Member
thanks jstyer for that detailed explanation.
Dan, I am looking forward to the challenge! It took me two looks on RL and two trips to the garage to even locate the thing! Then it was an 'ah!' moment! There it was lurking!
Dan, I am looking forward to the challenge! It took me two looks on RL and two trips to the garage to even locate the thing! Then it was an 'ah!' moment! There it was lurking!
01-27-2014, 03:02 PM
#7
I'm in the process of installing a new clutch master & slave cylinder along installing new shocks at all four corners. With the understanding I will be replacing the front struts I need to either disconnect the brake line to free it from the strut or cut the brake hose retainer on the strut to release it. I will need to bleed the clutch after I install the new master & slave cylinders, will I also need to bleed the brake lines even if I do not disconnect the brake lines? I ask this because if I do, I'll just discount the brake lines instead of cutting the retainer.
Thanks
Thanks
why not just plan on doing the whole system w/ fresh fluid?
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01-27-2014, 04:30 PM
#8
Track Day
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Bill Verburg
Quote:
Originally Posted by zooming993
I'm in the process of installing a new clutch master & slave cylinder along installing new shocks at all four corners. With the understanding I will be replacing the front struts I need to either disconnect the brake line to free it from the strut or cut the brake hose retainer on the strut to release it. I will need to bleed the clutch after I install the new master & slave cylinders, will I also need to bleed the brake lines even if I do not disconnect the brake lines? I ask this because if I do, I'll just discount the brake lines instead of cutting the retainer.
Thanks
You need to bleed anyway because of the new clutch master/slave setup and the brakes ought to be flushed annually anyway
why not just plan on doing the whole system w/ fresh fluid?
Quote:
Originally Posted by zooming993
I'm in the process of installing a new clutch master & slave cylinder along installing new shocks at all four corners. With the understanding I will be replacing the front struts I need to either disconnect the brake line to free it from the strut or cut the brake hose retainer on the strut to release it. I will need to bleed the clutch after I install the new master & slave cylinders, will I also need to bleed the brake lines even if I do not disconnect the brake lines? I ask this because if I do, I'll just discount the brake lines instead of cutting the retainer.
Thanks
You need to bleed anyway because of the new clutch master/slave setup and the brakes ought to be flushed annually anyway
why not just plan on doing the whole system w/ fresh fluid?
01-27-2014, 08:11 PM
#10
RL Community Team
Rennlist Member
Rennlist Member
When I replaced the struts I cut the hose mounts with a mototool saw from Harbor Freight. I then cut the mounts on the new struts before I installed them. A piece of cake!
01-27-2014, 08:48 PM
#11
Three Wheelin'
Repair manual shows "approx. 1 liter" for normal brake fluid change, and "approx. 1.6 liters" for hydraulic brake booster brake fluid changes. I believe the hydraulic brake boosters are on Turbo and 4S models. The clutch doesn't take much before it runs clear, I'd estimate 200ml, max. I like to have 2 litres of fluid on hand when I do both brakes and clutch.
01-27-2014, 11:27 PM
#12
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you can get different colour fluid to be sure you have flushed the whole system an rid it of the old fluid - Just a quick FYI
motiv pressure bleeder is your bFF.
If you have abd be sure to bleed this also or the system will not be correctly functioning
careful of the e46 below
motiv pressure bleeder is your bFF.
If you have abd be sure to bleed this also or the system will not be correctly functioning
careful of the e46 below