User Tag List

Reply
 
Thread Tools Rate Thread Display Modes
Old 01-26-2020, 02:02 PM #1
Ifirefight's Avatar
Ifirefight Ifirefight is offline
Member
 
Join Date: Nov 2017
Posts: 284
Ifirefight is on a distinguished road
Ifirefight Ifirefight is offline
Member
Ifirefight's Avatar
 
Join Date: Nov 2017
Posts: 284
Ifirefight is on a distinguished road
Losing brake fluid mysteriously

2001 with the dreaded ABS system. Was having issues with the dash brake warning light,buzzer,trac, abs lights coming on and going off after a while. Decided to bleed the brakes a few weeks ago. Seemed to help as far as the warning lights not coming on all the time. Checked fluid level yesterday, it was at the low mark. Added fluid. All is good. My question is where did all that fluid go? I park in the same spot, no drops on the ground and no fluid anywhere under the vehicle. Is it possible that there was air trapped in the lines and it has since worked its way out?


Sent from my iPhone using Tapatalk
Ifirefight is offline   Reply With QuoteReply With Quote
Old 01-26-2020, 02:40 PM #2
19963.4lsr5 19963.4lsr5 is offline
Elite Member
 
Join Date: Aug 2013
Location: Stouchsburg PA
Posts: 5,297
19963.4lsr5 is a splendid one to behold 19963.4lsr5 is a splendid one to behold 19963.4lsr5 is a splendid one to behold 19963.4lsr5 is a splendid one to behold 19963.4lsr5 is a splendid one to behold 19963.4lsr5 is a splendid one to behold 19963.4lsr5 is a splendid one to behold
19963.4lsr5 19963.4lsr5 is offline
Elite Member
 
Join Date: Aug 2013
Location: Stouchsburg PA
Posts: 5,297
19963.4lsr5 is a splendid one to behold 19963.4lsr5 is a splendid one to behold 19963.4lsr5 is a splendid one to behold 19963.4lsr5 is a splendid one to behold 19963.4lsr5 is a splendid one to behold 19963.4lsr5 is a splendid one to behold 19963.4lsr5 is a splendid one to behold
As pads ware the fluid level goes down. When fluid gets to the minimum line you are supposed to check your brake pads and shoes.

Sometimes the rear wheel cylinders leak and it’s not obvious until you remove the rear drums.


Sent from my iPhone using Tapatalk
19963.4lsr5 is offline   Reply With QuoteReply With Quote
Old 01-26-2020, 02:45 PM #3
Kanoe's Avatar
Kanoe Kanoe is offline
Senior Member
 
Join Date: Dec 2013
Location: Yukon
Posts: 1,317
Kanoe is just really nice Kanoe is just really nice Kanoe is just really nice Kanoe is just really nice
Kanoe Kanoe is offline
Senior Member
Kanoe's Avatar
 
Join Date: Dec 2013
Location: Yukon
Posts: 1,317
Kanoe is just really nice Kanoe is just really nice Kanoe is just really nice Kanoe is just really nice
I don't think air in the system would be it, it's a sealed system so air shouldn't be in there and couldn't work its way out.

There is not a lot of volume there. Maybe you wouldn't see a drip. It would only be a couple ounces over several weeks? Could you have a bleeder not quite tight enough? It would likely leak under pressure more so than resting. Get a helper to tromp on the brakes and look under for weeping.

I don't know if it's possible for the master cylinder to leak into the booster but maybe. That's one spot you wouldn't see.
__________________
-1996 4Runner. 3RZ 5-Spd. 4x4 Base model. OME2906/Toyota OEM rears with 2004 Tacoma Dual Rate Fronts on Bilstien 4600s.
-1993 Corolla Wagon 7AFE
-2001 Echo D.D.
Kanoe is offline   Reply With QuoteReply With Quote
Old 01-26-2020, 07:20 PM #4
BrianK14 BrianK14 is offline
Member
 
Join Date: Jun 2016
Location: Lexington, KY
Posts: 251
BrianK14 is on a distinguished road
BrianK14 BrianK14 is offline
Member
 
Join Date: Jun 2016
Location: Lexington, KY
Posts: 251
BrianK14 is on a distinguished road
Agreed with all that 19963 said above
BrianK14 is offline   Reply With QuoteReply With Quote
Old 01-26-2020, 07:38 PM #5
brillo_76's Avatar
brillo_76 brillo_76 is offline
Elite Member
 
Join Date: May 2017
Location: Western PA
Posts: 6,011
Real Name: Jon
brillo_76 has a reputation beyond repute brillo_76 has a reputation beyond repute brillo_76 has a reputation beyond repute brillo_76 has a reputation beyond repute brillo_76 has a reputation beyond repute brillo_76 has a reputation beyond repute brillo_76 has a reputation beyond repute brillo_76 has a reputation beyond repute brillo_76 has a reputation beyond repute brillo_76 has a reputation beyond repute brillo_76 has a reputation beyond repute
brillo_76 brillo_76 is offline
Elite Member
brillo_76's Avatar
 
Join Date: May 2017
Location: Western PA
Posts: 6,011
Real Name: Jon
brillo_76 has a reputation beyond repute brillo_76 has a reputation beyond repute brillo_76 has a reputation beyond repute brillo_76 has a reputation beyond repute brillo_76 has a reputation beyond repute brillo_76 has a reputation beyond repute brillo_76 has a reputation beyond repute brillo_76 has a reputation beyond repute brillo_76 has a reputation beyond repute brillo_76 has a reputation beyond repute brillo_76 has a reputation beyond repute
+ 2 with the other 2 users. If your brake system doesn't have any leaks. It goes to min line. Brake are warn out. If a small seep in the back shoes can be hidden for a while.

Sent from my SM-J337V using Tapatalk
__________________
7 3rd gens listed in the build thread (2 are parts mobiles)
Build Thread: https://www.toyota-4runner.org/3rd-g...os-builds.html
Brillo's Bucket Fluid Ex changer: https://www.toyota-4runner.org/3rd-g...ml#post3358086
Sparks Plugs Wire and Coil Information: https://www.toyota-4runner.org/3rd-g...on-5vz-fe.html
brillo_76 is offline   Reply With QuoteReply With Quote
Old 01-26-2020, 07:56 PM #6
Honda pc Honda pc is offline
Member
 
Join Date: Jul 2016
Location: Socal
Posts: 77
Honda pc is on a distinguished road
Honda pc Honda pc is offline
Member
 
Join Date: Jul 2016
Location: Socal
Posts: 77
Honda pc is on a distinguished road
I thought 4runner were plagued often by leaky wheel cylinder in back.. If its drum brakes.

Sent from my SM-N960U using Tapatalk
Honda pc is offline   Reply With QuoteReply With Quote
Old 01-27-2020, 02:21 PM #7
Kanoe's Avatar
Kanoe Kanoe is offline
Senior Member
 
Join Date: Dec 2013
Location: Yukon
Posts: 1,317
Kanoe is just really nice Kanoe is just really nice Kanoe is just really nice Kanoe is just really nice
Kanoe Kanoe is offline
Senior Member
Kanoe's Avatar
 
Join Date: Dec 2013
Location: Yukon
Posts: 1,317
Kanoe is just really nice Kanoe is just really nice Kanoe is just really nice Kanoe is just really nice
Quote:
Originally Posted by Honda pc View Post
I thought 4runner were plagued often by leaky wheel cylinder in back.. If its drum brakes.

Sent from my SM-N960U using Tapatalk
You don't hear much about it on this forum. Maybe 1 or 2 over the years but not a common complaint like the rear ale seals.
__________________
-1996 4Runner. 3RZ 5-Spd. 4x4 Base model. OME2906/Toyota OEM rears with 2004 Tacoma Dual Rate Fronts on Bilstien 4600s.
-1993 Corolla Wagon 7AFE
-2001 Echo D.D.
Kanoe is offline   Reply With QuoteReply With Quote
Old 01-27-2020, 05:17 PM #8
rightyouareken's Avatar
rightyouareken rightyouareken is offline
Member
 
Join Date: Feb 2019
Location: Seattle, WA
Posts: 384
rightyouareken has a spectacular aura about rightyouareken has a spectacular aura about rightyouareken has a spectacular aura about
rightyouareken rightyouareken is offline
Member
rightyouareken's Avatar
 
Join Date: Feb 2019
Location: Seattle, WA
Posts: 384
rightyouareken has a spectacular aura about rightyouareken has a spectacular aura about rightyouareken has a spectacular aura about
Did you follow the instructions on the master cylinder reservoir for how to properly check the fluid level? On the 2001-2002s with the hydraulic brake booster you need to pump the brake pedal ~40 times with the truck off to purge the pressure from the accumulator before checking the level. Once you turn the truck on and the system "pumps up" the fluid level drops down a bit, so if you top it off with it pressurized, the fluid may be overfilled.
__________________
2020 4Runner Venture
2002 4Runner SR5 4WD (sold)
1998 BMW M3/4/5
rightyouareken is offline   Reply With QuoteReply With Quote
Old 01-28-2020, 02:18 PM #9
Ifirefight's Avatar
Ifirefight Ifirefight is offline
Member
 
Join Date: Nov 2017
Posts: 284
Ifirefight is on a distinguished road
Ifirefight Ifirefight is offline
Member
Ifirefight's Avatar
 
Join Date: Nov 2017
Posts: 284
Ifirefight is on a distinguished road
Quote:
Originally Posted by rightyouareken View Post
Did you follow the instructions on the master cylinder reservoir for how to properly check the fluid level? On the 2001-2002s with the hydraulic brake booster you need to pump the brake pedal ~40 times with the truck off to purge the pressure from the accumulator before checking the level. Once you turn the truck on and the system "pumps up" the fluid level drops down a bit, so if you top it off with it pressurized, the fluid may be overfilled.


Yes, I did follow the instructions. I have the service manual for the 01 4Runner. I will pull the tires off and check the pads and drums in the rear. Thanks for the support.


Sent from my iPhone using Tapatalk
Ifirefight is offline   Reply With QuoteReply With Quote
Old 01-28-2020, 07:14 PM #10
rightyouareken's Avatar
rightyouareken rightyouareken is offline
Member
 
Join Date: Feb 2019
Location: Seattle, WA
Posts: 384
rightyouareken has a spectacular aura about rightyouareken has a spectacular aura about rightyouareken has a spectacular aura about
rightyouareken rightyouareken is offline
Member
rightyouareken's Avatar
 
Join Date: Feb 2019
Location: Seattle, WA
Posts: 384
rightyouareken has a spectacular aura about rightyouareken has a spectacular aura about rightyouareken has a spectacular aura about
Quote:
Originally Posted by Ifirefight View Post
Yes, I did follow the instructions. I have the service manual for the 01 4Runner. I will pull the tires off and check the pads and drums in the rear. Thanks for the support.


Sent from my iPhone using Tapatalk
Ok cool. It's an easy thing to miss and is unusual for most cars. Good luck finding the culprit.
__________________
2020 4Runner Venture
2002 4Runner SR5 4WD (sold)
1998 BMW M3/4/5
rightyouareken is offline   Reply With QuoteReply With Quote
Old 08-04-2020, 04:52 PM #11
Ifirefight's Avatar
Ifirefight Ifirefight is offline
Member
 
Join Date: Nov 2017
Posts: 284
Ifirefight is on a distinguished road
Ifirefight Ifirefight is offline
Member
Ifirefight's Avatar
 
Join Date: Nov 2017
Posts: 284
Ifirefight is on a distinguished road
UPDATE. Been meaning to update this. It was a bad rear brake cylinder. Easy fix and cheap. I replaced both of the rear ones to be safe. Losing brake fluid mysteriously


Sent from my iPhone using Tapatalk
Ifirefight is offline   Reply With QuoteReply With Quote
Old 08-04-2020, 06:53 PM #12
gamefreakgc's Avatar
gamefreakgc gamefreakgc is offline
Elite Member
 
Join Date: Oct 2014
Location: Citrus Heights, California
Age: 36
Posts: 7,326
Real Name: Jerod
gamefreakgc has a brilliant future gamefreakgc has a brilliant future gamefreakgc has a brilliant future gamefreakgc has a brilliant future gamefreakgc has a brilliant future gamefreakgc has a brilliant future gamefreakgc has a brilliant future gamefreakgc has a brilliant future gamefreakgc has a brilliant future gamefreakgc has a brilliant future gamefreakgc has a brilliant future
gamefreakgc gamefreakgc is offline
Elite Member
gamefreakgc's Avatar
 
Join Date: Oct 2014
Location: Citrus Heights, California
Age: 36
Posts: 7,326
Real Name: Jerod
gamefreakgc has a brilliant future gamefreakgc has a brilliant future gamefreakgc has a brilliant future gamefreakgc has a brilliant future gamefreakgc has a brilliant future gamefreakgc has a brilliant future gamefreakgc has a brilliant future gamefreakgc has a brilliant future gamefreakgc has a brilliant future gamefreakgc has a brilliant future gamefreakgc has a brilliant future
Quote:
Originally Posted by Ifirefight View Post
UPDATE. Been meaning to update this. It was a bad rear brake cylinder. Easy fix and cheap. I replaced both of the rear ones to be safe. Losing brake fluid mysteriously


Sent from my iPhone using Tapatalk
Great job being attentive to the signals your car was giving you! A lot of people would have just kept filling it up until the leak got worse and worse.
__________________
'98 4Runner SR5 - 4x4 JDM 5VZ-FE Supercharged - 249K miles.
326WHP 347TQ

AEM F/IC 6, 11 PSI, 3" Intake and 3" Exhaust
Jerod's Supercharged T[u]RD Build
gamefreakgc is offline   Reply With QuoteReply With Quote
Old 08-04-2020, 09:44 PM #13
Sarki Sarki is offline
Member
 
Join Date: Dec 2014
Location: New York-Lower Hudson Valley
Posts: 493
Sarki has a spectacular aura about Sarki has a spectacular aura about
Sarki Sarki is offline
Member
 
Join Date: Dec 2014
Location: New York-Lower Hudson Valley
Posts: 493
Sarki has a spectacular aura about Sarki has a spectacular aura about
Quote:
Originally Posted by rightyouareken View Post
Did you follow the instructions on the master cylinder reservoir for how to properly check the fluid level? On the 2001-2002s with the hydraulic brake booster you need to pump the brake pedal ~40 times with the truck off to purge the pressure from the accumulator before checking the level. Once you turn the truck on and the system "pumps up" the fluid level drops down a bit, so if you top it off with it pressurized, the fluid may be overfilled.
This point is very true. I realized this after replacing my rear shoes & drums and rebuilding bell cranks. I bled the entire system with Motive power bleeder with great results.
I filled reservoir up to max level and over next few days noticed the level is lower in the master reservoir after driving. Almost topped it up to max level again but waited overnight to check next day.
Fluid level was back at max level next day.
Monitored this over following weeks and noticed exactly what you have said in your explanation.
I now have very good working brakes and an effective and properly working parking brake.
__________________
2002 SR5 Sport 4WD
Sarki is offline   Reply With QuoteReply With Quote
Old 11-27-2020, 03:07 PM #14
OliviaBall OliviaBall is offline
Junior Member
 
Join Date: Nov 2020
Location: London
Posts: 1
OliviaBall is on a distinguished road
OliviaBall OliviaBall is offline
Junior Member
 
Join Date: Nov 2020
Location: London
Posts: 1
OliviaBall is on a distinguished road
You need to check carefully all the hoses and clamps, usually it is the main problem if fluid disappearing. I had the same problem and not only with the brake fluid, but with engine antifreeze as well. When I was stopping the engine, I was hearing how the fluids were getting out little by little and I was feeling the smell of those. That scared me a lot and I thought that the car is dead and there is no chance to repair it. So I decided to read more about this and I realized that I can repair everything by myself. Now everything is works well and I am very thankful. I would recommend you not to hesitate to learn more information about braking system and to understand how everything works and what fluid your car needs.

Last edited by OliviaBall; 12-02-2020 at 09:07 PM.
OliviaBall is offline   Reply With QuoteReply With Quote
Reply

Tags
brake , coming , fluid , lights , warning

Thread Tools
Display Modes Rate This Thread
Rate This Thread:

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 On

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Losing brake fluid very slowly. Where from? Sporin 4th Gen T4Rs 23 06-13-2019 10:09 PM
How to redo thermostat (and install trans cooler) without losing much fluid DK327 3rd gen T4Rs 5 05-26-2016 11:48 PM
Brake fluid/dash light situation/ fluid level FlaskTL 5th gen T4Rs 19 06-03-2015 10:53 PM
Losing radiator fluid scoots0492 Problems & Warranty Issues 9 04-01-2008 11:05 PM
Brake fluid, transmission fluid, and rear differential fluid NViejeP 4th Gen T4Rs 12 03-31-2007 03:43 PM

Powered by vBadvanced CMPS v3.2.2

All times are GMT -4. The time now is 02:45 AM.

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2024 DragonByte Technologies Ltd.
Feedback Buttons provided by Advanced Post Thanks / Like (Lite) - vBulletin Mods & Addons Copyright © 2024 DragonByte Technologies Ltd.
User Alert System provided by Advanced User Tagging (Lite) - vBulletin Mods & Addons Copyright © 2024 DragonByte Technologies Ltd.
***This site is an unofficial Toyota site, and is not officially endorsed, supported, authorized by or affiliated with Toyota. All company, product, or service names references in this web site are used for identification purposes only and may be trademarks of their respective owners. The Toyota name, marks, designs and logos, as well as Toyota model names, are registered trademarks of Toyota Motor Corporation***Ad Management plugin by RedTyger
 
Copyright © 2020