Problem with flushing the brake system 03 Focus ZX5 - Focus Fanatics
Focus Fanatics Ford Focus Forums
HomeContact UsAbout UsGalleryDiscussion ForumsMarketplace



Go Back   Focus Fanatics > Ford Focus Tech Discussions > General Technical Chat

General Technical Chat This section is for technical discussions relating to general maintenance, electrical issues, engine trouble, and recalls.

Search This Forum | Image Search | Advanced Search    
FocusFest Ford Focus Tire & Wheels FocusFanatics Merchandise

Reply
 
Thread Tools Display Modes
Old 12-30-2012, 12:28 PM   #1
marsdog
Focus Rookie
 
Join Date: Feb 2012
Fan#: 94801
Location: Atlanta, GA
What I Drive: 2003 red ZX5

Posts: 11
FF Reputation: 1 marsdog Good Standing Member
Buy-Sell-Trade Rating: (0)
Question Problem with flushing the brake system 03 Focus ZX5

Sorry, wrong place. Moved to general tech discussion


marsdog is offline  
    Reply With Quote
Sponsored Links
Advertisement
 
Old 12-30-2012, 12:43 PM   #2
marsdog
Focus Rookie
 
Join Date: Feb 2012
Fan#: 94801
Location: Atlanta, GA
What I Drive: 2003 red ZX5

Posts: 11
FF Reputation: 1 marsdog Good Standing Member
Buy-Sell-Trade Rating: (0)
Question Problem with flushing the brake system 03 Focus ZX5

I tried to flush the brake system of my 03 Focus ZX5. It has 80k miles and the mechanics warned me to change the brake fluid several times already.

I did the 'press pedal - open bleed screw - close bleed screw - release pedal' approach with a friend helping me and ran almost 1 qt new fluid through to get clear fluid come out of all four wheels.

Then the problem came -- I almost lost the brake force. I figured it must be some air went into the system during the process so I did the bleeding one more time. I didn't see much bubble (if any) come out during the bleeding. The brake pedal is quite firm with engine off but becomes very soft as soon as I turned the engine. Now I have some brake force but it is still softer than before.

Shall I bleed the system one more time? Does driving some miles help move air down the pipe? Is it possible I broke something else?

BTW: with the two-men approach, I don't have to leave some fluid in the waste fluid bottle, put the other end of bleed tube under the fluid and hold the bottle higher than bleed nipple, do I?
marsdog is offline  
    Reply With Quote
Old 12-30-2012, 02:13 PM   #3
elsolo
Focus Fanatic
 
elsolo's Avatar
 
Join Date: Mar 2012
Fan#: 96835
Location: Long Beach, CA
What I Drive: 2003 dark shadow grey metallic ZX3

Posts: 1,923
FF Reputation: 17 elsolo Great Standing Member
Buy-Sell-Trade Rating: (1)
How likely is it that you sucked a little air into the system by letting the fluid level in the master cylinder reservoir get too low?

If you have anti-lock brakes, you are supposed to disconnect the battery first. Not sure why or if it matters at all, I have never disconnected the battery to bleed the brakes on anything.
elsolo is offline  
    Reply With Quote
Old 12-30-2012, 02:49 PM   #4
misfire
Moderator
 
misfire's Avatar
 
Join Date: Jan 2006
Fan#: 31379
Location: West Chester, PA
What I Drive: 2012 SEL Hatch, 2014 Mazda CX-5

Posts: 15,678
FF Reputation: 30 misfire Great Standing Member
Buy-Sell-Trade Rating: (13)
Quote:
Originally Posted by marsdog View Post
Sorry, wrong place. Moved to general tech discussion
you didn't move it, you opened a new thread.

MERGED TO: Technical Chat thread already in existence.
__________________
Will aka Misfire
2010/2011/2012/2013 Ford Master Certified Service Advisor
2003 LX "traded in"/2010 SES "traded in"/2012 SEL Hatch "current"
misfire is offline  
    Reply With Quote
Old 12-30-2012, 03:31 PM   #5
whynotthinkwhynot
Captain TMI
 
whynotthinkwhynot's Avatar
 
Join Date: Jan 2005
Fan#: 18416
Location: the armpit of TN, Memphis, TN
What I Drive: 05 ZXW; 02 Windstar; 13 C-Max SEL

Posts: 19,795
FF Reputation: 267 whynotthinkwhynot Outstanding Standing Memberwhynotthinkwhynot Outstanding Standing Memberwhynotthinkwhynot Outstanding Standing Member
Buy-Sell-Trade Rating: (1)
Eh, you don't need buddies. That process is slower, and more prone to issues afterwards. Get you a Miti-Vac brake bleeder kit for about $25. Some stores might let you rent it. This is a vacuum bleeder. Read the directions. Go bleed your brakes. You'll be done in less than an hour by yourself. Most of that time will be getting proper access to the bleeder nipple.

Now you did have the cap off the master cylinder when you were bleeding- right? If not, you will need a new master cylinder.
__________________
Be eclectic.
---The Complete How-To Archive--

Moderating everything now, let me know if I can help.

Quote:
Originally Posted by the user formerly known as ZX3_Chick View Post
You're special aren't you.
whynotthinkwhynot is offline  
    Reply With Quote
Old 12-30-2012, 03:32 PM   #6
coldbear
Focus Enthusiast
 
Join Date: Sep 2010
Fan#: 78292
Location: Dayton, OH
What I Drive: 2001 Burgandy ZXT

Posts: 339
FF Reputation: 1 coldbear Good Standing Member
Buy-Sell-Trade Rating: (0)
Need a power bleed.

If you were bleeding brakes and now you have a soft pedal, you need to POWER BLEED that system. Since the introduction of ABS brakes, this system requires another bleeding process.( Power). You've probably got a small air pocket in your lines causing problems. Good luck, keep us informed how it came out.?
coldbear is offline  
    Reply With Quote
Old 12-30-2012, 05:05 PM   #7
marsdog
Focus Rookie
 
Join Date: Feb 2012
Fan#: 94801
Location: Atlanta, GA
What I Drive: 2003 red ZX5

Posts: 11
FF Reputation: 1 marsdog Good Standing Member
Buy-Sell-Trade Rating: (0)
There was once the fluid level in master cylinder reservoir lower than MIN. s
Maybe this caused the problem?

I don't have ABS so the old school way should work fine.


Quote:
Originally Posted by ello View Post
How likely is it that you sucked a little air into the system by letting the fluid level in the master cylinder reservoir get too low?

If you have anti-lock brakes, you are supposed to disconnect the battery first. Not sure why or if it matters at all, I have never disconnected the battery to bleed the brakes on anything.
marsdog is offline  
    Reply With Quote
Old 12-30-2012, 05:14 PM   #8
marsdog
Focus Rookie
 
Join Date: Feb 2012
Fan#: 94801
Location: Atlanta, GA
What I Drive: 2003 red ZX5

Posts: 11
FF Reputation: 1 marsdog Good Standing Member
Buy-Sell-Trade Rating: (0)
Quote:
Originally Posted by whynotthinkwhynot View Post
Eh, you don't need buddies. That process is slower, and more prone to issues afterwards. Get you a Miti-Vac brake bleeder kit for about $25. Some stores might let you rent it. This is a vacuum bleeder. Read the directions. Go bleed your brakes. You'll be done in less than an hour by yourself. Most of that time will be getting proper access to the bleeder nipple.

Now you did have the cap off the master cylinder when you were bleeding- right? If not, you will need a new master cylinder.
You mean leave the master cylinder reservoir open during bleeding? No, I did put the cap back (to avoid squirting fluid, I read somewhere) but disconnected the cable goes into the cap (not sure what that is for). How did this hurt the master cylinder?
marsdog is offline  
    Reply With Quote
Old 12-30-2012, 05:24 PM   #9
whynotthinkwhynot
Captain TMI
 
whynotthinkwhynot's Avatar
 
Join Date: Jan 2005
Fan#: 18416
Location: the armpit of TN, Memphis, TN
What I Drive: 05 ZXW; 02 Windstar; 13 C-Max SEL

Posts: 19,795
FF Reputation: 267 whynotthinkwhynot Outstanding Standing Memberwhynotthinkwhynot Outstanding Standing Memberwhynotthinkwhynot Outstanding Standing Member
Buy-Sell-Trade Rating: (1)
Quote:
Originally Posted by marsdog View Post
You mean leave the master cylinder reservoir open during bleeding? No, I did put the cap back (to avoid squirting fluid, I read somewhere) but disconnected the cable goes into the cap (not sure what that is for). How did this hurt the master cylinder?
Brake fluid does not compress. So if you put the cap back on, then you have someone open up a bleeder, push fluid out, tighten the bleeder, and then let up on the pedal, things can break. AFAIK, there is not a design that overcomes this basic principle, but you might get lucky and it's just air in the system. A vacuum bleeder will set you straight. If you can get a hard pedal again- then you're ok. If not then you need to replace the master cylinder and be sure to follow the bench bleeding process, then vacuum bleed again.
__________________
Be eclectic.
---The Complete How-To Archive--

Moderating everything now, let me know if I can help.

Quote:
Originally Posted by the user formerly known as ZX3_Chick View Post
You're special aren't you.
whynotthinkwhynot is offline  
    Reply With Quote
Old 12-30-2012, 05:31 PM   #10
marsdog
Focus Rookie
 
Join Date: Feb 2012
Fan#: 94801
Location: Atlanta, GA
What I Drive: 2003 red ZX5

Posts: 11
FF Reputation: 1 marsdog Good Standing Member
Buy-Sell-Trade Rating: (0)
Quote:
Originally Posted by whynotthinkwhynot View Post
Brake fluid does not compress. So if you put the cap back on, then you have someone open up a bleeder, push fluid out, tighten the bleeder, and then let up on the pedal, things can break. AFAIK, there is not a design that overcomes this basic principle, but you might get lucky and it's just air in the system. A vacuum bleeder will set you straight. If you can get a hard pedal again- then you're ok. If not then you need to replace the master cylinder and be sure to follow the bench bleeding process, then vacuum bleed again.
Thanks. Will try the vacuum bleeder. "Mity Vac MV8020 Brake Bleeding Kit" is what you referred to, right?

I drove 30+ miles with the soft pedal this afternoon and it was not that bad. Any other sign I can tell if the master cylinder is broken, e.g. fluid leak after driving?
marsdog is offline  
    Reply With Quote
Reply

Bookmarks & Social Networks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -5. The time now is 01:21 AM.


Copyright 2002-2014 FocusFanatics.com. All Rights Reserved : Terms of Use : Privacy Policy : Advertise Information : Site Map

Focus Fanatics Ford Focus Forum offers many fun ways for you to engage with other Ford Focus Owners from across the world. Whether it be about the aftermarket performance modifications, technical how-to's, European tuned suspension or awesome fuel economy similar to the Acura TLX. You can find all Ford Focus related information here. Join our Ford Focus discussion forums and chat with local Focus enthusiasts in your area.