Brakes are spongy - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

Milly · 05-31-2012, 03:21 PM

Okay so I've bled my brakes in the right order like 5 times. I've ran almost 2 bottles through the lines.

When I took it for a test ride you'd have to pump the brakes in order to stop. After a couple pumps you could hold it down.

New brake pads and all, is there still air in the lines or do I need new brake lines??

Thanks!

satek · 05-31-2012, 03:40 PM

Did you replace the bmc or let the bmc run dry at some point?

Milly · 05-31-2012, 04:32 PM

Nope the Bmc has not been replaced, the brakes weren't spongy before I took the calipers off to paint them.. So I was thinking there was just air in it until I bled it 5 times and it didn't help much.

The Bmc I don't think ever ran completely dry but it did go below minimum at one point... Not during the last bleed though, I made sure of it..

mr2gons14 · 05-31-2012, 07:10 PM

sounds like air in the lines use one of those do it urself bleeders they are awesome.

Milly · 05-31-2012, 07:22 PM

where do i get a do it yourself bleeder?

i used the little cup thing with a bit of brake fluid at the bottom....ran a tube from the bleeder valve to the cup... had friend pump brakes, did each caliper for about 2-3 cup fulls of fluid...

KiLLeR2001 · 05-31-2012, 07:43 PM

Oh come on... At least search first...

http://zilvia.net/f/tech-talk/455823...ts-spongy.html

Milly · 05-31-2012, 08:13 PM

Quote:

Originally Posted by KiLLeR2001

Oh come on... At least search first...

http://zilvia.net/f/tech-talk/455823...ts-spongy.html

Thanks for the link....read through it, and in the end it turns out it was the BMC?

I guess I'll be purchasing one from the autozone in a couple days!

OddyseusDSM · 05-31-2012, 09:47 PM

did ya bench bleed the master? if you left off to paint and ran it dry it'll cause this issue. car on put pressure to the brakes, if the pedal slowly goes to the floor while applying constant pressure its the master

also when bleeding DO NOT PUMP TO THE FLOOR!!!!! EVER!!!!! I work at autozone, you wouldn't believe how many we sell just cause someone ruined the piston seal while bleeding. not taking a shot at you man, just warning people. 1/2 pumps except when you got a new or refurb'd, i just do it as to never have a problem.

Also because i work at Autozone and mentioned autozone i have to state that i am not trying to sell you anything, and any advice/opinion i have given is not necessarily reflected by autozone etc etc.....

6330 · 06-05-2012, 01:22 AM

Check around the seals on the caliper, you could be losing pressure if the seals are damaged.

Milly · 06-05-2012, 06:41 AM

I changed the bmc and the problem got better, now I only have to push it once but it goes to the floor, and slows down kind of slow... Won't lock up for sure.

People have been saying new booster?

05-31-2012, 03:21 PM	#1
Milly Leaky Injector Join Date: Mar 2012 Location: Charleston sc Posts: 112 Trader Rating: (0) Feedback Score: 0 reviews	Brakes are spongy Okay so I've bled my brakes in the right order like 5 times. I've ran almost 2 bottles through the lines. When I took it for a test ride you'd have to pump the brakes in order to stop. After a couple pumps you could hold it down. New brake pads and all, is there still air in the lines or do I need new brake lines?? Thanks!

05-31-2012, 07:10 PM	#4
mr2gons14 Zilvia Addict Join Date: Jun 2011 Location: Phoenix, AZ Age: 30 Posts: 639 Trader Rating: (7) Feedback Score: 7 reviews	sounds like air in the lines use one of those do it urself bleeders they are awesome. __________________ zilvia.net/f/cars-sale/517359-95-240sx-sr20-swap-uras-greddy-apexi-ect.html

05-31-2012, 07:43 PM	#6
KiLLeR2001 Post Whore! Join Date: Jun 2007 Location: オーランドフロリダ Posts: 7,955 Trader Rating: (46) Feedback Score: 46 reviews	Oh come on... At least search first... http://zilvia.net/f/tech-talk/455823...ts-spongy.html __________________

06-05-2012, 01:22 AM	#9
6330 Join Date: Dec 2010 Location: Sydney Australia Posts: 12 Trader Rating: (0) Feedback Score: 0 reviews	Check around the seals on the caliper, you could be losing pressure if the seals are damaged. __________________

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05-31-2012, 03:40 PM	#2
satek Leaky Injector Join Date: Jan 2010 Location: Vancouver BC Age: 30 Posts: 132 Trader Rating: (0) Feedback Score: 0 reviews	Did you replace the bmc or let the bmc run dry at some point?

05-31-2012, 04:32 PM	#3
Milly Leaky Injector Join Date: Mar 2012 Location: Charleston sc Posts: 112 Trader Rating: (0) Feedback Score: 0 reviews	Nope the Bmc has not been replaced, the brakes weren't spongy before I took the calipers off to paint them.. So I was thinking there was just air in it until I bled it 5 times and it didn't help much. The Bmc I don't think ever ran completely dry but it did go below minimum at one point... Not during the last bleed though, I made sure of it..

05-31-2012, 07:22 PM	#5
Milly Leaky Injector Join Date: Mar 2012 Location: Charleston sc Posts: 112 Trader Rating: (0) Feedback Score: 0 reviews	where do i get a do it yourself bleeder? i used the little cup thing with a bit of brake fluid at the bottom....ran a tube from the bleeder valve to the cup... had friend pump brakes, did each caliper for about 2-3 cup fulls of fluid...

05-31-2012, 09:47 PM	#8
OddyseusDSM Zilvia Junkie Join Date: Jan 2009 Location: NL, CT Posts: 373 Trader Rating: (4) Feedback Score: 4 reviews	did ya bench bleed the master? if you left off to paint and ran it dry it'll cause this issue. car on put pressure to the brakes, if the pedal slowly goes to the floor while applying constant pressure its the master also when bleeding DO NOT PUMP TO THE FLOOR!!!!! EVER!!!!! I work at autozone, you wouldn't believe how many we sell just cause someone ruined the piston seal while bleeding. not taking a shot at you man, just warning people. 1/2 pumps except when you got a new or refurb'd, i just do it as to never have a problem. Also because i work at Autozone and mentioned autozone i have to state that i am not trying to sell you anything, and any advice/opinion i have given is not necessarily reflected by autozone etc etc.....

06-05-2012, 06:41 AM	#10
Milly Leaky Injector Join Date: Mar 2012 Location: Charleston sc Posts: 112 Trader Rating: (0) Feedback Score: 0 reviews	I changed the bmc and the problem got better, now I only have to push it once but it goes to the floor, and slows down kind of slow... Won't lock up for sure. People have been saying new booster?