hey guys, just have a few questions before i go through and replace my master cyclinder. ive never done brakes before but im sure it cant be too hard. it says to drain my brake fluid. to do that, should i just open the bleeder valve on one of my calipers or all of them and let it all drain out till it doesnt drain anymore, then start to remove the brake master cyclinder? any help/instructions you can give is good. i have the helms manual, but it isnt too clear on how to do everything.
btw, is it ok to keep the car on jack stands for a long time? like over night or 2 days?
before red92 says something, i know to use the flare wrench set for the brake fittings so im gonna go buy a set tomorrow from home depot.
any other advice/help/imstructions would be great. im gonna be using this thread to ask questions during the process if i need help.
that should help some bit... thats for bench bleeding...
since you're gonna be replacing the master cylinder...
once it is installed.... have the brake fluid filled up to the max line... then bleed all 4 corners starting with the Passenger side Rear, then Driver Side Front, then Passenger Side Front, then Driver Side Rear....
then refill the master cylinder to max line... and there ya go..
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its easy. just look at some directions. you just need a 10mm flare wrench (you dont need it, but it is recommended). just make sure and bench bleed it, whatever that is. basically just put some fluid through the cylinder first. installation is easy. just BE CAREFUL when putting the brake lines back on. do not strip them, go slow and it will be a PITA guaranteed but it will be worth it in the end.
but how do i do a complete flush of my old brake fluid? or will that happen automatically when i install the new BMC and bleed all 4 brakes? i just want to make sure all the brake fluid is my new one because i think the old brake fluid isnt the same as my new one so i dont want to mix the two at all.
and it says to drain my brake fluid. to do that, should i just open the bleeder valve on one of my calipers or all of them and let it all drain out till it drains everything, then start to remove the brake master cyclinder?
and now your saying i have to bench bleed my BMC? i looked at the instructions and im a bit confused. it says about plastic tubes, but i dont have any plastic tubes that came with it. i dont really understand because if i put brake fluid in the master cylinder then doesnt that mean when i take off the tubes and nipples that are in the brake fittings, all the fluid will spill out when i try to install it in my car? or is it just to get everything inside coated with brake fluid? in that case, could i just put some brake fluid in it and depress the plunger and let the brake fluid leak into a bucket or something. i think i may understand if the brake master cylinder doesnt let brake fluid out unless its depressed to push it out.
do i need to go buy a BMC bench bleeding kit?
or can i just unscrew the line leading to the part that distributes to the 4 brakes, and let it bleed through there into a bucket and then when its drained, connect it back?
if someone could just give me very detailed directions as to how to approach this, like instead of just says drain the brake fluid, say how. it would be appreciated. i might even make a write up on how to do this again when im finished for future people who want to replace their master cylinders.
i know i asked a lot of detailed questions, but i really appreciate it cuz this is my first time and i dont wanna mess up and i wanna know exactly what to do and how to do it thanx guys.
Last edited by MidNiteMysT; 09-05-2005 at 01:37 AM.
but how do i do a complete flush of my old brake fluid? or will that happen automatically when i install the new BMC and bleed all 4 brakes? i just want to make sure all the brake fluid is my new one because i think the old brake fluid isnt the same as my new one so i dont want to mix the two at all.
the old brake fluid will drain out when you bleed the brakes.....
Quote:
Originally Posted by MidNiteMysT
and it says to drain my brake fluid. to do that, should i just open the bleeder valve on one of my calipers or all of them and let it all drain out till it drains everything, then start to remove the brake master cyclinder?
just take out as much as you can from the master cylinder.. hell just take out the master cylinder w/ the fluid on it.... you're replacing it anyways.....
Quote:
Originally Posted by MidNiteMysT
and now your saying i have to bench bleed my BMC? i looked at the instructions and im a bit confused. it says about plastic tubes, but i dont have any plastic tubes that came with it. i dont really understand because if i put brake fluid in the master cylinder then doesnt that mean when i take off the tubes and nipples that are in the brake fittings, all the fluid will spill out when i try to install it in my car? or is it just to get everything inside coated with brake fluid? in that case, could i just put some brake fluid in it and depress the plunger and let the brake fluid leak into a bucket or something. i think i may understand if the brake master cylinder doesnt let brake fluid out unless its depressed to push it out.
the plastic tubes are for bench bleeding your master cylinder..... what you are doing is trying to get rid of all the air thats inside the master cylinder.....
Quote:
Originally Posted by MidNiteMysT
do i need to go buy a BMC bench bleeding kit?
or can i just unscrew the line leading to the part that distributes to the 4 brakes, and let it bleed through there into a bucket and then when its drained, connect it back?
you can buy one if you want to... but if you have a big round metal pan.... that'll do just as good... just when you're bleeding the master cylinder.... just have the master cylinder facing diagnaly towards the bottom of the metal pan...
Quote:
Originally Posted by MidNiteMysT
if someone could just give me very detailed directions as to how to approach this, like instead of just says drain the brake fluid, say how. it would be appreciated. i might even make a write up on how to do this again when im finished for future people who want to replace their master cylinders.
I think there's some out there in PO... just gotta search for it...
Quote:
Originally Posted by MidNiteMysT
i know i asked a lot of detailed questions, but i really appreciate it cuz this is my first time and i dont wanna mess up and i wanna know exactly what to do and how to do it thanx guys.
Im the same way too... lol
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its easy. just relax. put some plastic over your fender to protect the paint from possible fluid spills. just do it. thats what i did. you CAN do it. its simple. just take your time, dont rush. its fun! oh, get a friend to help you with bleeding the brakes
yea, im gonna put some plastic of some sort to protect the paint, im sure i can find something.
about the bench bleeding, you said i need a big round metal pan. it can just be any bucket of some sort right? just to catch the falling fluid
and what part of it should be facing diagonally towards the pan? like which way do i lean it? and when i put brake fluid in the master cylinder, does it just drip out the brake line fittings or it has to be pushed out for it to come out? i just dont understand why since all the fluid will leak out anyway and instroduce more bubbles, ya know?
i tried o submerge the cylinder....took too much fluid. just work with it. use the included tubes and it will be easy. you can figure it out. basically you just want to pump fluid through the cylinder without letting air in. put fluid in the reservior and then put the tubes on he outlets on the cylinder and submerge the tubes so if you suck anything up, its just fluid. very simple
i cant even find this bench bleeding kit from autozone. maybe ill just have to do without it... but i wanna do it right the first time. i guess ill call up another place.
but can you guys answer the simple question of when you put fluid in the reservior, does it leak out of the brake line fitting holes freely, or you have to put pressure in the reservior for it to leak out? thats what im having a lot of confusion with.
i tried o submerge the cylinder....took too much fluid. just work with it. use the included tubes and it will be easy. you can figure it out. basically you just want to pump fluid through the cylinder without letting air in. put fluid in the reservior and then put the tubes on he outlets on the cylinder and submerge the tubes so if you suck anything up, its just fluid. very simple
well thats the problem, i dont have the tubes or the fittings so im not able to do it. i need to find those first.
i cant even find this bench bleeding kit from autozone. maybe ill just have to do without it... but i wanna do it right the first time. i guess ill call up another place.
but can you guys answer the simple question of when you put fluid in the reservior, does it leak out of the brake line fitting holes freely, or you have to put pressure in the reservior for it to leak out? thats what im having a lot of confusion with.
when you put brake fluid in.. it won't leak out... you have to simulate the brake pedal pushing the brake master cylinder...
when you take out the brake master cylinder... you'll see a pin outside the Brake Booster... that pin pushes the primary piston inside the brake cylinder... and thus.. brake fluid comes out from the reservoir....
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o ok... yea, i think i figured that out today actually. i can just mount my new BMC and "bench bleed" it on the car. ill just have someone press on the brake while i hold the tube in the resevior until i dont see anymore bubbles, then take the tubes out. i went to autozone today and found something that i think may work. and i also got nipples to put over the brake lines so no air can be introduced into the line but im sure some will anyway.
i have a question tho, i see like 2 other reserviors for brake fluid. what do i do with those?? should i replace those brake fluid too? im not even sure what they are for. i thought tere was only one place to put brake fluid and that was in the BMC. please enlighten me on that.
now that i got the bench bleeding stuff, i can finally start that as soon i get my car in the garage. everythings starting to piece together now i just have to know about those other brake fluid reserviors.
The only other reserviors I can think of is the clutch reservior. but I don't have ABS and can't remember is has its own reservior. Other than that? There is the Power Steering reservior, the coolant overflow reservior, and the windsheild washer fluid reservior.
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i read the top of the caps and they said "dot 3 or 4 brake fluid" so i know they have brake fluid in em. maybe ill take a pic of em tomorrow and post em.
depending on your car, the AB reservior is on the passenger side. the clutch reservior is the smaller of the two on the driver side and then brake reservior is the bigger of the two on the driver side.
im in the middle of replacing my master cylinder. i got the old one out, even tho my nuespeed strut bar is in the way. i had to manuever around that. but anyway, i have a question
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so im gonna go buy a set tomorrow from home depot.
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