master cylinder problem?

[jason_law]

hi, i have an integra si manual with no abs..........i found that sometimes in the morning or in very hot day, in the traffic light, the brake will slowly sink to bottom.........and when i release the pedal and push again, it's fine....it just happened sometimes, so, i cant really go to garage and show them, what problem will it be??? i have changed new pad and fuild...also, i checked i never lose any brake fuild...


thx

[Horny_Devil]

try this it will tell u if the seal is stuffed

Originally Posted by horny_devil

check ur master cylinder first

you can also check ur brake booster by doing the following

1. with the engine stoped derpess the break pedal several times - The travel distance shouldnt change.
2. With the brake pedal full depressed, start the engine - the pedal should move down a lil when the engine starts.
3. depress the brake, stop the engine and hold the pedal in for about 30sec - the pedal should neither sink or rise.
4. restart the engine, run it for about a minute and then turn it off. then firmly depress the brake several times - the pedal travel should decrease with each application.
5. if ur brakes do not operate as described above, the brake booster is either is in need of repair or failed.


this tell u that the system is airtight. if it fails then there is a problem with the seal round the piston

[jason_law]

1. with the engine stoped derpess the break pedal several times - The travel distance shouldnt change.




nornally, it will travel less each time u press it??

[Dw33d0r]

Yes your master cylinder is stuffed. Buy a new one, I paid $80 for a near-new one for my DA6, I was having the same sinking pedal problem.

Just make sure that when you remove the old one, use a decent open-ended crescent to undo the 10mm nuts that hold the steel hoses to the master cylinder, as they're super tight and will round easily. I had to use vice grips, mine were that tight.. then just undo the 2 bolts holding the master cylinder onto the booster, swap it over with the new one, do everything back up, bleed the whole system. It took me around an hour and a half.

[Horny_Devil]

press it till it gets hard, then it shouldnt move anymore just be hard

[jason_law]

so, which car's master cylinder will fit my car??? cos i dont want to take the rise as it's brake.........and how can i identify the master cylinder???
will the abs one fit my car???thx

[Horny_Devil]

u can buy a seal kit at the likes of repco and just replace the seals on it as thats probably whats fucked

[jason_law]

hi......
i just went to repco yesterday......they said they only have the following

non-abs with b18a engine
abs with b18c engine...


but what i need is non-abs with b18c engine.(15/16 master cylinder)....so, will the non-abs with b18a engine will fit??

also, they said that they wont sell repair kit......the whole master cylinder cost $260.......anyone here can hook me up to get a cheap one??

thx

[Dw33d0r]

Try Strongs.