Brake Fluid Flush

Submitted: Thursday, Feb 28, 2008 at 15:20
ThreadID: 55008 Views:6665 Replies:5 FollowUps:10
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Hello Every one

Any tricks or traps in flushing brake fluid on 2001 FZJ105 100 series cruiser just replaced the pads want to change fluid looks a bit average


Old pop
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Reply By: redfive - Thursday, Feb 28, 2008 at 15:57

Thursday, Feb 28, 2008 at 15:57

Well this is how i do it change your pads and everything first then park on a bit of a slope with the rear of the car going down hill choc the wheels with something.
Hose down the inner wheel and brakes with water help diluted the brake fluid open up the bleed nipple on one side (do the longest side first ) should be the left hand rear and make sure you keep a eye on the fluid level.
"Never let it run out" make sure you use a different colour brake fluid so you know when it changes colour its flushed.
So do one side first then the other then turn car around and do the front.
You let gravity do the work and it doesn't mess with things just make sure you dont "let the brake res run out".
When your finished get some degreaser and spray all the brakes and wheels and hose it off and you should have a nice firm pedal again

AnswerID: 289826

Follow Up By: oldpop - Thursday, Feb 28, 2008 at 16:16

Thursday, Feb 28, 2008 at 16:16
Hello Redfive
Thanks for that info
will do it tmorrow

Old pop
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Reply By: Member - Phil G (SA) - Thursday, Feb 28, 2008 at 16:35

Thursday, Feb 28, 2008 at 16:35
Make sure you use DOT 3 fluid - your Toyota Dealer is one of the few places that still have it.
AnswerID: 289836

Follow Up By: oldpop - Thursday, Feb 28, 2008 at 16:49

Thursday, Feb 28, 2008 at 16:49
Hi Phill G

I have Valvoline dot 3\4 can this be used


Old pop
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Follow Up By: Member - Phil G (SA) - Thursday, Feb 28, 2008 at 17:47

Thursday, Feb 28, 2008 at 17:47
If its DOT 3, it should be OK.
DOT 4 fluid can swell the seals, so i simply buy the Toyota stuff - less than $10 for 500mls.
FollowupID: 555170

Reply By: Gerhardp1 - Thursday, Feb 28, 2008 at 19:16

Thursday, Feb 28, 2008 at 19:16
Rather than dripping fluid all over the wheels and driveway, and wasting precious water hosing it into the gutter, I suggest a better way.

Drop by Supercheap and get a brake bleed tool. This is a plastic hose that goes on your bleeder nipple, and has a non-return ball valve. Place one end on nipple, the valve end into a container to catch the crud. This tool allows you to do the job single handed.

Then drop the end of an old rag (with no fluff) into the master cylinder, and siphon out as much of the old fluid as is easy to retrieve - this is an optional step, but in my view speeds things up by minimising the mixing of old and new fluid. Fill the cyl with new brake fluid of the appropriate type, and then bleed all 4 wheels in their correct sequence, making sure you don't run the cyl dry. It should only take 6-8 pumps of the pedal to do each wheel as the lines don't hold that much fluid.

Job done, no mess on drive or wheels, old fluid properly disposed of.

AnswerID: 289863

Follow Up By: oldpop - Thursday, Feb 28, 2008 at 20:10

Thursday, Feb 28, 2008 at 20:10
Hello Gerhardp1

will visit supercheap tomorrow
thanks for the advice

Old pop
FollowupID: 555192

Follow Up By: Stephen M (NSW) - Thursday, Feb 28, 2008 at 21:28

Thursday, Feb 28, 2008 at 21:28
Even a quicker and cleaner way to suck the old fluid out from the master cylinder is a syringe and suck it out that way. Less chance of spilling on car or paintwork around. Just make sure as mentioned above not to let the master run out. I flush my power steering the same way,takes longer but no upsetting any hoses.Regards Steve M
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Follow Up By: Member - Davidp P (VIC) - Thursday, Feb 28, 2008 at 23:59

Thursday, Feb 28, 2008 at 23:59
PUMPING the pedal means that the seals on the piston are forced further than their normal "polished" area into a potentially pitted area for the first time and that can cause a tiny nick in the seal which results in seal failure. Better to avoid pumping of the pedal. Siphon fluid out of master, top up with fresh and pressurise if you can adapt a spare cap with a nipple and bike pump. When pads wear down open bleed nipple before pushing piston back.... gets rid of the worst bleep then close bleed this means new fluid is diluted the least........cheers silverback
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Follow Up By: blown4by - Saturday, Mar 01, 2008 at 12:47

Saturday, Mar 01, 2008 at 12:47
Re sucking the power steering fluid out with a syringe that is fine but don't forget the reservior internal filter/screen & what about all the dirty fluid in the steering pump/steering rack & lines, etc. If you drop off the return line into a container & run the engine, keeping the reservoir topped up all the time until clean fluid returns, you flush all that old #rap out.
FollowupID: 555551

Follow Up By: blown4by - Saturday, Mar 01, 2008 at 19:54

Saturday, Mar 01, 2008 at 19:54
Sorry but the Supercheap 1 man operated bleeder is a piece of junk in my experience. If it works for you. Great.
FollowupID: 555617

Follow Up By: Member - Davidp P (VIC) - Saturday, Mar 01, 2008 at 20:31

Saturday, Mar 01, 2008 at 20:31
I in theory but in practice the taper thread still lets air back in to the brake line and the NON return valve sometimes DOES.....cheers slvrbk (who needs vwls)

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Reply By: Member - sdr00y (Beecroft) - Thursday, Feb 28, 2008 at 20:48

Thursday, Feb 28, 2008 at 20:48
Don't get any fluid on your paint work either, it eats away at the paint. If you do, wipe then wash it off.

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AnswerID: 289884

Reply By: blown4by - Saturday, Mar 01, 2008 at 12:41

Saturday, Mar 01, 2008 at 12:41
his is how I was taught when I did my apprecticeship & it has served me well for 40 years. I have never repaced or re-sealed a wheel cylinder, caliper or m/cyl on any vehicle I have owned & none has ever leaked and most were kept for many years. If you don't have pressure bleeding equipment do the following:
1. Siphon all fluid from the m/cyl using a clear length of beverage tubing or G-J clear tubing with an internal dia that fits snugly over your brake bleeder nipples. Suck the remaining fluid out from any depressions (you can see it coming up the tube so you dont get a mouth full) I use an ice cream container to contain all the old fluid and place it close to the m/cyl so you are not dripping fluid on the paintwork. If you do spill any wash with running H2O immediately. Get any black gunge remaining in the m/cyl out with clean lint free rag and wrapped around a small screwdriver.
2. Re-fill the m/cyl using clean new fluid (per the specs in your handbook) & re-fit the cap. Make sure you new fluid is not past its shelf life because stored in the shed "for years" it can absorb moisture, especially once the container has been opened, and defeats the purpose of what you are trying to achieve. The higher the DOT # the higher the boiling point. Brake fluid is very hygroscopic which means it suck moisture from the atmosphere & can absorb its own weightin H2O.Any moisture in the fluid lowers the boiling point & the fluid gets very hot when braking hard & if it were to boil gas bubbles are produced which being compressible = pedal to the metal & no brakes. Not good!
3.First go to the wheel furtherest away from the m/cyl (this is important) & using the correct size ring spanner gently check if the bleeder will turn anti-clockwise slightly but not enough to open it letting air into the system. Once you know it is able to be undone fit the clear tube over the bleeder nipple. If you have the correct size it will be tight fit & if necessary heat it first in hot water. Using the correct tight fitting ring spanner is important as the bleeders can be very tight & round off easily & break off as well if you force them too much.When you first test each one for tightness watch the bleeder as the spanner turns & if you see any hint of the spanner turning & the bleeder on the wheel side of the spanner staying stationary STOP because it is going to break off. They get seized easilyas they seal on a machined taper seat.
4. Place the tube in a small jar & have someone hold their foot firmly on the brake pedal. Open the bleeder until the pedal has reached the floor. Close the bleeder & tell them to let the pedal up & pump it until firm again. It is important not to let any air into the system so DO NOT have the bleeder open at any time the pedal is not under pressure or held down to the floor. Repeat the pedal pumping & bleeding until clean fluid comes the the clear tube. DO NOT let the m/cyl level get too low. If you do air gets in the system & is a bugger to get all of it out
5. Repeat this process at each wheel in order of distance from the m/cyldoing the one closest to the m/cyl last. Make sure all bleeders are tightened firmly & their rubber dirt caps are re-fitted.
6. Wash off any spilt lfuid with water, degreaser is not needed.Make sure the m/cyl is topped up. Regards pushing the m/cyl piston & seals past their polished zone into a pitted zone, the whole m/cyl bore is polished from new & if the fluid is flushed regularly (at least evey 24 months) there wont be a pitted zone. You will be amazed at the #rap that comes out in the old fluid & if bad enough you may experience slightly more responsive brakes. Good luck.
AnswerID: 290230

Follow Up By: Gerhardp1 - Saturday, Mar 01, 2008 at 15:42

Saturday, Mar 01, 2008 at 15:42
The Supercheap non-return valve allows you do do all this with one person, not two.
FollowupID: 555570

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