Originally posted by: DingDingDao
There are a couple of things moochadime hasn't touched on.
1) You will need to change the brake fluid, and bleed the brake lines. You can do this with a brake bleeder, or another way to do this is to pull the brake line away from the caliper and pump the brakes until the fluid flows without bubbles. You'll end up wasting some brake fluid, but it's the only way I know of to bleed the lines without a proper bleeder.
2) Don't forget to properly bed the brake pads, or you'll end up with uneven wear and a) shortened life on your pads and b) warped rotors. There are a couple of techniques for bedding brake pads:
--slow method: brake easy (nothing more than 75% braking pressure) for the first 200 miles or so. Obviously, if you have to brake hard, you have to, just try not to do it all the time.
--quicker method: do this at night so you won't cause an accident. Drive down a straight, level road at about 40 miles an hour, and brake hard to a slow roll (~5 mph). Repeat 8-10 times. This will probably burn off a small amount of pad, but it will effectively bed your pads in a very short amount of time.
Originally posted by: moochadime
Originally posted by: DingDingDao
There are a couple of things moochadime hasn't touched on.
1) You will need to change the brake fluid, and bleed the brake lines. You can do this with a brake bleeder, or another way to do this is to pull the brake line away from the caliper and pump the brakes until the fluid flows without bubbles. You'll end up wasting some brake fluid, but it's the only way I know of to bleed the lines without a proper bleeder.
2) Don't forget to properly bed the brake pads, or you'll end up with uneven wear and a) shortened life on your pads and b) warped rotors. There are a couple of techniques for bedding brake pads:
--slow method: brake easy (nothing more than 75% braking pressure) for the first 200 miles or so. Obviously, if you have to brake hard, you have to, just try not to do it all the time.
--quicker method: do this at night so you won't cause an accident. Drive down a straight, level road at about 40 miles an hour, and brake hard to a slow roll (~5 mph). Repeat 8-10 times. This will probably burn off a small amount of pad, but it will effectively bed your pads in a very short amount of time.
Where did you get your skills man???
Ypu dont need to bleed the brakes after doing a brake job UNLESS he replaced a brake line or has a leak in the system. If he was to bleed the brakes you do not remove the line from the caliper or brake cylinder. That will cause air to get into each of them. The proper way to bleed is using the bleader valve located on each caliper or cylinder. You can gravity bleed where you open it and let gravity take over OR 2 person it where one pumps up on the pedal holds it and you turn the valve letting the air out, close the valve, then pump again till no moreair comes out.
But your changing pads and rotors and you do not need to empty you system of fluid christ he will have to bleed the master cyclinder then as well and that can be very complicated.
As for the seating the brakes your sort of right but dont need to go through all of that. Just drive the car normal. If you normally brake hard all the time the ys your going to warp your rotors no matter if you have new brakes or not. You just need noce gentle stops all the time and you can get 100K out of a set of brakes.
If I was new to this and saw what you wrote I wouldnt tackle it 😛
Originally posted by: CadetLee
You have rear discs?
(cheap) rotors for my '98 Corolla are about 25 bucks apiece..I could pay 80+ for really nice ones, though..pads, anywhere from $20-50/set. You should be able to do it yourself for under $200..
Originally posted by: DingDingDao
lol. Sorry not trying to make it sound difficult. I've changed rotors and pads before, and IMHO I would not do a four-corner pad/rotor swap without changing the brake fluid. Being that you're a mechanic, I'm sure you're better informed than I am. :beer:
Originally posted by: DingDingDao
There are a couple of things moochadime hasn't touched on.
1) You will need to change the brake fluid, and bleed the brake lines. You can do this with a brake bleeder, or another way to do this is to pull the brake line away from the caliper and pump the brakes until the fluid flows without bubbles. You'll end up wasting some brake fluid, but it's the only way I know of to bleed the lines without a proper bleeder.
2) Don't forget to properly bed the brake pads, or you'll end up with uneven wear and a) shortened life on your pads and b) warped rotors. There are a couple of techniques for bedding brake pads:
--slow method: brake easy (nothing more than 75% braking pressure) for the first 200 miles or so. Obviously, if you have to brake hard, you have to, just try not to do it all the time.
--quicker method: do this at night so you won't cause an accident. Drive down a straight, level road at about 40 miles an hour, and brake hard to a slow roll (~5 mph). Repeat 8-10 times. This will probably burn off a small amount of pad, but it will effectively bed your pads in a very short amount of time.
Originally posted by: moochadime
Originally posted by: DingDingDao
There are a couple of things moochadime hasn't touched on.
1) You will need to change the brake fluid, and bleed the brake lines. You can do this with a brake bleeder, or another way to do this is to pull the brake line away from the caliper and pump the brakes until the fluid flows without bubbles. You'll end up wasting some brake fluid, but it's the only way I know of to bleed the lines without a proper bleeder.
2) Don't forget to properly bed the brake pads, or you'll end up with uneven wear and a) shortened life on your pads and b) warped rotors. There are a couple of techniques for bedding brake pads:
--slow method: brake easy (nothing more than 75% braking pressure) for the first 200 miles or so. Obviously, if you have to brake hard, you have to, just try not to do it all the time.
--quicker method: do this at night so you won't cause an accident. Drive down a straight, level road at about 40 miles an hour, and brake hard to a slow roll (~5 mph). Repeat 8-10 times. This will probably burn off a small amount of pad, but it will effectively bed your pads in a very short amount of time.
Where did you get your skills man???
You dont need to bleed the brakes or change all the fluid after doing a brake job UNLESS he replaced a brake line or has a leak in the system. If he was to bleed the brakes you do not remove the line from the caliper or brake cylinder. That will cause air to get into each of them. The proper way to bleed is using the bleader valve located on each caliper or cylinder. You can gravity bleed where you open it and let gravity take over OR 2 person it where one pumps up on the pedal holds it and you turn the valve letting the air out, close the valve, then pump again till no more air comes out.
But your changing pads and rotors and you do not need to empty your system of fluid christ he will have to bleed the master cyclinder then as well and that can be very complicated.
As for the seating the brakes your sort of right but dont need to go through all of that. Just drive the car normal. If you normally brake hard all the time then yes your going to warp your rotors no matter if you have new brakes or not. You just need nice gentle stops letting friction take over and you can get 100K out of a set of brakes. I cant recall the last time I had to replace the brakes on my own car to be honest.
If I was new to this and saw what you wrote I wouldnt tackle it 😛 But I did forget one extreamly important thing. After you are done DO NOT MOVE THE CAR untill you sit in park and pump the pedal back up. Because you pushed all the calipers in they will not be touching the rotor and you need to pump the pedal before moving the car or you will no thave any brakes at all untill you do. by then you will be out into the street before they catch.
Originally posted by: whoiswes
Originally posted by: CadetLee
You have rear discs?
(cheap) rotors for my '98 Corolla are about 25 bucks apiece..I could pay 80+ for really nice ones, though..pads, anywhere from $20-50/set. You should be able to do it yourself for under $200..
that's exactly what i would have said...
Originally posted by: DingDingDao
lol. Sorry not trying to make it sound difficult. I've changed rotors and pads before, and IMHO I would not do a four-corner pad/rotor swap without changing the brake fluid. Being that you're a mechanic, I'm sure you're better informed than I am. :beer:
i wouldn't change my fluid either - modern brake fluid doesn't need to be changed nearly as often, nor is it in the owner's best interest to do so. sure, if you have the skills, you could change the fluid every time you change out the pads (or rotors). but to tell a complete novice to do so is irresponsible - he doesn't NEED new brake fluid, he needs new rotors and pads.
don't give him more work that he already has - he can tackle the lines next time around.
sorry if this sounds harsh - i can't tell if that last comment is sarcastic or not... :laugh:
Originally posted by: DingDingDao
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No not sarcastic. He does have more experience and knowledge than I do.
Sorry guys, no need to flame. I wrote what I knew (er, what I thought I knew), but you learn something new every day and I just learned that a) you don't need to change the brake fluid and b) I need nomex for my flame-suit 😉