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#1
05-04-2005, 08:16 PM
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brake problem
 I just replaced my front brakes. All went well, until I started driving the car.  The pedal hit the floor. I need to pump it a few times to make it grab.  I've changed brakes before, the only difference is... I released the lid on the brake fluid master cylinder, just as I read on the forums.  I thought I must have let air in the system, so I bled the lines with no change. I read in the manual that the front brakes don't engage until the rear ones do first. Because the rear pads are old and the front ones are new, would this cause the problem? 
Last edited by dannmarr; 05-05-2005 at 07:32 PM. 
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#2
05-04-2005, 09:58 PM
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Barring some paranormal event, you need a new master cylinder. Eventually you won't be able to pump the pedal and stop at all.
No, the difference in pad age doesn't matter. No, the feature of the rear brakes being held off until the fronts apply is a safety feature to keep the rear end from skidding around the front. It's such a small difference in time that you would never have suspected it had you not read it. When you push the pistons back into the caliper you should first open the bleeder on that caliper and push the fluid out instead of back through the ABS pump and into the master cylinder. There's a lot of gargbage that accumulates in the calipers.
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ASE Certified Master Automotive Technician w/L1. ASE Certified Master Medium/Heavy Truck Technician. Certified EVT (Emergency Vehicle Technician) Last edited by Beav; 05-04-2005 at 10:10 PM.
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#3
05-04-2005, 10:02 PM
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Did you bleed all four brakes?
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Mychailo :: 2006 Silver Mitsubishi Evolution 9, E85, 34 psi peak, 425wtq/505whp DJ :: 1995 Laguna Blue SVX L AWD 5MT (sold) Visit my locker SVX Mods: ND iridium spark plugs, Impreza RS fpr, afr tuned to 13.2:1 using a custom MAF bypass, custom exhaust, WRX 5MT w/ STi RA 1st-4th gear & stock WRX 5th gear, Exedy 13 lb flywheel & Sport Clutch, STi Group N tranny & engine mounts, urethane spacers in rear subframe, rear diff mounts, and pitch stopper, SVX Sport Strut Springs (185f/150r), custom 19 mm rear swaybar, urethane swaybar mounts, Rota Torque 17x8", 225/45-17 Proxes 4 tires, Axxis Deluxe Plus organic brake pads.
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#4
05-05-2005, 12:11 AM
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And there is an order to bleed them in too.
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. Earl .... ... .... ><SVX(*> Subaru Ambassador [COLOR=”silver”]1992 Tri Color L[/COLOR] ~45K (06/91) #2430 1992 Dark Teal LS-L ~184K (05/91) #0739 1992 Claret LS-L ~196K (05/91) #0831 1992 Pearl LS-L ~103K (06/91) #1680 1992 Pearl LS-L ~151K (06/91) #2229 1992 Dark Teal LS ~150K (07/91) #3098 (parts car) 1992 White LS-L ~139K (08/92) #6913 1993 25th AE ~98K (02/93) #164 1993 25th AE ~58K (02/93) #176 1993 25th AE ~107K (02/93) #215 1993 25th AE ~162K (02/93) #223 1994 Laguna Blue Pearl LSi ~124K (1/94) #2408 1994 Laguna Blue Pearl LSi ~144K (10/93) #1484 1994 Laguna Blue Pearl LSi ~68K (10/93) #1525 1994 Barcelona Red LSi ~46K (02/94) #2624 1994 Pearl LSi ~41K (12/93) #1961 1995 Bordeaux Pearl LSi ~70K (02/95) #855 1996 Polo Green LSi ~95K (03/96) #872 1997 Bordeaux Pearl LSi ~55K (08/96) #097 2003 Brilliant Red LS1 Convertible ~29K (04/03) #8951 1999 Magnetic Red LS1 Coupe ~33K (04/99) #6420 My Email | Old Locker | New Locker | Picture of 15 of the 19
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#6
05-05-2005, 12:04 PM
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The symptoms seem to point to the master cylinder but I'm sure you didn't touch that when changing the brakes.
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David B. SVXipedia @ SVX-IW.COM -- SVX Information Warehouse 2.0 coming...eventually! Ebony 1992 SVX LS-L 5 spd Koni/GC Stebro 187k miles RIP (Rust In Pieces) 1993 SVX 5 spd Koni/GC Stebro Polyurethane bushings still available!
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#7
05-05-2005, 12:28 PM
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Quote:
__________________
ASE Certified Master Automotive Technician w/L1. ASE Certified Master Medium/Heavy Truck Technician. Certified EVT (Emergency Vehicle Technician)
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#8
05-08-2005, 06:53 PM
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I fixed the problem.
 I bought a "one man bleeding kit" for 4 dollars at an auto store. Comes with a plastic bottle and a see through tube. Just connect the end of the tube to the bleeding valve, pump the brakes, check the tube. If you see bubbles in it, pump the brakes again until they are all gone. Job done.  I believe air entered into my brake line because I left the cap loose on the master cylinder while changing the brakes, something I never did in the past. Thanks for everyones input. 
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#9
05-08-2005, 08:55 PM
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Leaving the cap loose won't allow air into the system. Keep an eye on it for a couple days, don't get into a situation in case the problem recurs.
__________________
ASE Certified Master Automotive Technician w/L1. ASE Certified Master Medium/Heavy Truck Technician. Certified EVT (Emergency Vehicle Technician)
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