soft brake pedal help - Scion xB Forum
Scion xB Suspension, Chassis & Brakes Questions and answers about Scion xB suspension, chassis, & brake upgrades! You have to admit the box looks mighty fine when dropped. This is where you get the details for Scion xB suspension, chassis, & brake alterations.

 
LinkBack Thread Tools
#1 Old 06-16-2011, 02:39 PM
Registered User
 
Join Date: Jun 2011
Posts: 3
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
rlarson is on a distinguished road
(Thread Starter)
soft brake pedal help

Changed the front brake pads on my 2006 xb Monday night, i forgot to completely tighten the passenger side bleeder valve and proceeded to leak brake fluid up and down the street as I was trying to build pressure up in the brakes. I tightened the valve back up, and filled the reservoir back up with fluid. It has been 2 days but the brake pedal is still very soft. The car stops ok, but it's kind of scary. Any suggestions as to what is going on?
rlarson is offline  
Sponsored Links
Advertisement
 
#2 Old 06-16-2011, 03:17 PM
Pishtaco
 
BestmpgxB's Avatar
 
Join Date: Oct 2010
Location: NorCal
Posts: 3,852
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 2 Post(s)
BestmpgxB will become famous soon enough
Re: soft brake pedal help

You have air in the lines. Do you know how to bleed brakes?

Have you ever noticed that anybody driving slower than you is an idiot, and anyone going faster than you is a maniac? George Carlin
49.5 mpg avg over 53,000 miles. 176% of '08 EPA
Best flat drive 94.5 mpg for 10.1 mi
Longest tank 1033 km (642 mi) on 10.56 gal = 60.8 mpg
Boycotting Exxon/Mobil since 1989, BP/ARCO/Amoco since 2010

See my cross-country trip report here, & my 1000 km tank here.
BestmpgxB is offline  
#3 Old 06-16-2011, 03:30 PM
Pishtaco
 
BestmpgxB's Avatar
 
Join Date: Oct 2010
Location: NorCal
Posts: 3,852
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 2 Post(s)
BestmpgxB will become famous soon enough
Re: soft brake pedal help

I'll assume you don't. Get an assistant. Even a 10 year old neighbor will do.

Crawl under the car with bleeder wrench in hand.

Have your assistant pump on the brakes ten times and keep pressure on the pedal, while you loosen the bleeder on the rear brake farthest from the master cylinder. As you open the bleeder, brake fluid and air will exit the bleeder, and the pedal will drop to the floor. Tell your assistant to keep the pedal there, while you tighten the bleeder. Repeat the pump and bleed until only fluid comes out.

Check your brake fluid level in the master cylinder and refill as necessary. Be sure to use a new can of Toyota-spec brake fluid.

Move to the other rear brake and repeat the pump and bleed, and the brae fluid check.

Move to the front brake farthest from the master cylinder. Repeat the pump and bleed, and brake fluid check.

Repeat on remaining brake. Your brakes should be firm again.

Have you ever noticed that anybody driving slower than you is an idiot, and anyone going faster than you is a maniac? George Carlin
49.5 mpg avg over 53,000 miles. 176% of '08 EPA
Best flat drive 94.5 mpg for 10.1 mi
Longest tank 1033 km (642 mi) on 10.56 gal = 60.8 mpg
Boycotting Exxon/Mobil since 1989, BP/ARCO/Amoco since 2010

See my cross-country trip report here, & my 1000 km tank here.
BestmpgxB is offline  
#4 Old 06-16-2011, 03:32 PM
@HFDane on Instagram
 
The_Doctor's Avatar
 
Join Date: Mar 2011
Location: Griffin, GA
Posts: 6,288
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 4 Post(s)
The_Doctor will become famous soon enough
You gotta bleed your brakes.

http://www.popularmechanics.com/cars...enance/4213448




Follow me on Instagram @HFDane
The_Doctor is offline  
#5 Old 06-16-2011, 03:35 PM
Pishtaco
 
BestmpgxB's Avatar
 
Join Date: Oct 2010
Location: NorCal
Posts: 3,852
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 2 Post(s)
BestmpgxB will become famous soon enough
Re: soft brake pedal help

If you can't find an assistant, you can buy a one way check valve and hose that will let you do the bleeding alone. You drop the hose end into a glass or plastic bottle, and you don't drip brake fluid on the street/driveway/garage floor.

Have you ever noticed that anybody driving slower than you is an idiot, and anyone going faster than you is a maniac? George Carlin
49.5 mpg avg over 53,000 miles. 176% of '08 EPA
Best flat drive 94.5 mpg for 10.1 mi
Longest tank 1033 km (642 mi) on 10.56 gal = 60.8 mpg
Boycotting Exxon/Mobil since 1989, BP/ARCO/Amoco since 2010

See my cross-country trip report here, & my 1000 km tank here.
BestmpgxB is offline  
#6 Old 06-16-2011, 04:40 PM
Registered User
 
Join Date: Jun 2011
Posts: 3
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
rlarson is on a distinguished road
(Thread Starter)
Re: soft brake pedal help

Quote:
Originally Posted by BestmpgxB View Post
I'll assume you don't. Get an assistant. Even a 10 year old neighbor will do.

Crawl under the car with bleeder wrench in hand.

Have your assistant pump on the brakes ten times and keep pressure on the pedal, while you loosen the bleeder on the rear brake farthest from the master cylinder. As you open the bleeder, brake fluid and air will exit the bleeder, and the pedal will drop to the floor. Tell your assistant to keep the pedal there, while you tighten the bleeder. Repeat the pump and bleed until only fluid comes out.

Check your brake fluid level in the master cylinder and refill as necessary. Be sure to use a new can of Toyota-spec brake fluid.

Move to the other rear brake and repeat the pump and bleed, and the brae fluid check.

Move to the front brake farthest from the master cylinder. Repeat the pump and bleed, and brake fluid check.

Repeat on remaining brake. Your brakes should be firm again.
This can be done without removing the tires right?
rlarson is offline  
#7 Old 06-16-2011, 05:13 PM
@HFDane on Instagram
 
The_Doctor's Avatar
 
Join Date: Mar 2011
Location: Griffin, GA
Posts: 6,288
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 4 Post(s)
The_Doctor will become famous soon enough
Yeah, the bleeder valves are behind the brakes. So no tires need to come off if you can reach the bleeder valves




Follow me on Instagram @HFDane
The_Doctor is offline  
#8 Old 06-17-2011, 10:28 AM
Registered User
 
whitej47's Avatar
 
Join Date: Jan 2009
Location: West Covina, CA
Posts: 4,800
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
whitej47 will become famous soon enough whitej47 will become famous soon enough
Send a message via AIM to whitej47
Re: soft brake pedal help

Quote:
Originally Posted by BestmpgxB View Post
Check your brake fluid level in the master cylinder and refill as necessary. Be sure to use a new can of Toyota-spec brake fluid.
You can use any DOT3 brake fluid and that will do just fine. I used Penzoil when I refilled mine. Some people say they prefer DOT 4 or higher, but you would have to drain the entire systemt and the stock brake lines and master cylinder are not designed for this fluid.

I would also like to note that for the majority of brake pad replacements out there you DO NOT(and should not) need to mess with bleeding the fluid at all. People always "feel better" with new fluids, but if you don't have any problems (i.e. leaky calipers, soft pedal, etc.) don't mess with the system. I ended up doing mie do to my 4x SS brake line replacement and rear disc brake conversion...in this case it was necessary.

ETA= Soon enough...June '12, made it!

Quote:
Originally Posted by BigRuss View Post
...and FUSA...
naahhhhhhh
whitej47 is offline  
#9 Old 06-21-2011, 12:01 PM
Registered User
 
Join Date: Jun 2011
Posts: 3
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
rlarson is on a distinguished road
(Thread Starter)
Re: soft brake pedal help

Thanks for the help everyone, bled the lines the other night and they work great now!
rlarson is offline  
#10 Old 06-21-2011, 12:11 PM
Pishtaco
 
BestmpgxB's Avatar
 
Join Date: Oct 2010
Location: NorCal
Posts: 3,852
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 2 Post(s)
BestmpgxB will become famous soon enough
Re: soft brake pedal help

Glad I could help. Enjoy!

Have you ever noticed that anybody driving slower than you is an idiot, and anyone going faster than you is a maniac? George Carlin
49.5 mpg avg over 53,000 miles. 176% of '08 EPA
Best flat drive 94.5 mpg for 10.1 mi
Longest tank 1033 km (642 mi) on 10.56 gal = 60.8 mpg
Boycotting Exxon/Mobil since 1989, BP/ARCO/Amoco since 2010

See my cross-country trip report here, & my 1000 km tank here.
BestmpgxB is offline  
Reply

User Tag List

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



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
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome