Weak Brakes - Toyota Nation Forum : Toyota Car and Truck Forums

daniel2002p · 06-12-2006, 09:23 AM

Ok here is the deal, yesterday I replaced my frond and read brake pads, and now the car ir braking like shit. I know they are on properly, and I went to the dealer and purchased toyota original brake pads, but now you can hit the brake pedal all the way and the car will not brake like before, while before I changed the brakes if you hit the brakes almost all the way the tires will start locking up.... now here is my question, if I just replaced the brake pads and nothing else and I am sure that they are on right and all that stuff, is it possible that I could have gotten air in the lines somehow and that I may need to bleed the lines???

D

BTW 05 rolla s

Flashmn · 06-12-2006, 12:42 PM

New pads will always take some time to seat and you shouldnt overwork them or they'll glaze and become shit. Also have you changed the brake fluid?

AVANT · 06-12-2006, 05:02 PM

When you change pads, air will almost always get in. Air is highly compressible, so a small bubble will affect your braking a lot. Bleed them and see it how turns out.

As said, brake new pads don't work very well brand new. Especially if you did not resurface the brake rotors (which you should alway do with a pad change unless you're replacing the rotors with new ones imo).

Combined, it can affect your stopping power dramatically.

punter · 06-12-2006, 05:32 PM

Can't believe you didn't bleed the brakes after a pad change.

I guess your lucky it didn't cause an accident, live and learn i guess.

punter · 06-12-2006, 05:36 PM

On a side note why would the pads need changing on an 05 corolla, thats a very short life span for pads.

Flashmn · 06-12-2006, 05:59 PM

its a heavy car.

I never generally bleed my brakes if I only change pads, since you push the pistons in, how is air gonna get in, when theres no air in there to begin with.

punter · 06-12-2006, 06:04 PM

Fluid often leaks aroung the seals as the wen't designed to be move that much at once.
(ie. to wear the pads down it takes 3 years, and you push it back that amount in 20 secs)

Everytime i've changed my pads they needed bleeding, somtimes it was a minimal amout, but air is still air.

Flashmn · 06-12-2006, 06:08 PM

Yeah fluid leaks UNDER PRESSURE, now that same pressure prevents air from going in, got it? good.

punter · 06-12-2006, 06:57 PM

Brake fluid is only under pressure when you push the pedal.

Seems kinda odd you trying to tell me the air I bled out of my brakes wasn't there.

daniel2002p · 06-12-2006, 10:11 PM

Thanks who all that replied, and for right now I am not driving the car untill I figure this out, I am driving my 04 tacoma in the mean time, but tomorrow I will try to blead the braking system and see where that gets me. Punter to answer your question, I wanted some performance pads and rotors so I got them and replaced the rotor and pads, the factory brake pads had plenty of "meat" on them, I just wanted to change them out with some better pads....

D

punter · 06-13-2006, 06:35 AM

What brand of pads are they, they're not full on race pads are they? (ie. they don't work when cold)

Anyway bleed them as seem if that helps.

Flashmn · 06-13-2006, 07:37 AM

Quote:

What brand of pads are they, they're not full on race pads are they? (ie. they don't work when cold)

Quote:

I know they are on properly, and I went to the dealer and purchased toyota original brake pads

.... and toyota stealership sells race pads now?

daniel2002p · 06-13-2006, 10:16 AM

TRD brakepads, not really total race pads, but their version of the TRD brake pads and rotors

retiredat44 · 06-13-2006, 11:00 AM

Buy a cheap brake bleed kit fromt he auto parts store. You might be able to bleed it alone, without help, with the kit which includes a bottle and hose to hookup to the bleed nipple. But, I always get someone to help bleed the brakes, that way when they puch the peddle down, I can look for air bubble in the hose.

I like to buy a decent size bottle of brake fluid, if you don't know which to get, ask the counter person. Make sure you have the proper size wrench for the nipple, mine use an 8mm boxend. Be extremely careful when you tighten the nipple, it doesn't take much force to over-tighten and break it.

There are probably instructions, maybe even on the autozone website, or other, but since I have been working on stuff my whole life, I don't look up instructions for everything.