Order of bleeding brakes

[97avy]

Anyone know the order for bleeding brakes on a 97 Avalon? Thanks

[nodrogkam]

I had posted this before multiple times.

all of the vehicles basically follow this procedure, and im sure yours does because i have your manual.

its quite simple but time consuming and friend is recommended.

need a crecent wrench (i use adjustable because its all i got) to open and close the bleeder valve, small diameter rubber hose to fit over the bleeder valve, and something to hold all the dirty fluid in.

OH and of course a bottle of brake fluid. Large if you want to do a complete bleedout, small/medium if you're just looking to clear out the dirty fluid in the callipers.

Please only use recommended fluid stated on brake reservior cap.
Also if you plan on using synthetic, i recommend a large bottle so you can completely clean out the system.

So as with all brake bleeding procedures you start from the brake farthest from the brake booster/master cylinder.
In this case the rear passenger brake, then rear driver, then front passenger, then front driver.

Procedure for doing this (with a friend is best)...hood must be open and brake reserviour cap must be removed and new fluid ready for use - add fluid till full if necessary.
1. 1 person in driver seat and one person next the calliper.
2. Remove rubber cap from brake bleeder valve and attach rubber hose to it.
3. Use wrench to loosen, but not remove the bleeder valve - 2-4 turns is more than enough.
4. Make driver pump the brakes in and smooth and continuous motion for about 15-20 pumps.
5. Slowly depress the brake pedal one last time and while you're doing so have your friend gently tighten the brake bleeder valve.
6. Check reservior and add fluid till full - never let the reservior go far below or below the low level. getting air in the master cylinder is a pain in the butt to fix, so make sure there is always fluid in the reservior.
7. Have foot on brake and tell friend to open valve and repeat pumping 15-20 times.
8. Repeat close bleeder, fill reservior etc.
9. Doing this about 3 times per calliper should suffice, you must make sure there are no air bubbles coming out when bleeding the system and you must tighten the bleeder valves as fluid is being pushed out to make sure no air gets back into the system.

If you do 3 sets of 15-20 pumps per calliper, expect to use a large bottle of fluid. Typically you can stop bleeding when the fluid becomes clear.


Hope this helps.

one final note - do not refill your brake fluid all the way to full when you're finished with the whole procedure, unless you're changing the brake pads too. Reason being is that the next time you change the pads the reservior will spill out being too full. So note the fluid level before bleeding and try to match that (unless the level is low, then add some), and check your pads, because if fluid is low, chances are pads are low.
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[silverxls]

that's a great description, and i hate to be a critic, but i have to point out that if you loosen the bleeder as in step 3, and then pump the brake 15-20 times, you will suck lots of air into the brake line and will never get the job done. your friend should pump the brake 4 or 5 times and then pump and hold pressure on the brake pedal, THEN loosen the bleeder. fluid and air will come out and the brake pedal will go to the floor. no matter what, your friend should not let off the brake until you then tighten the bleeder. then repeat the step again, checking in between cycles that there is ample fluid in the reservoir and adding if neccesary. if you run the resevoir low you may pump air into the system from that end.

[Mike Murrell]

There is a sequence in which brakes are bleed.

On older cars it was: RR - LR - RF - LF

You started at the farthest point and moved forward.

On newer cars and by that I mean any car with a proportioning valve, it's different. You would need to consult the FSM(factory service manual) for that year/make/model.