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Brakes & Suspension Forum sponsored by The Tire Rack |
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10-07-2003, 09:43 PM | #1 |
Scooby Newbie
Member#: 10642
Join Date: Sep 2001
Chapter/Region:
MWSOC
Location: Omaha Nebraska
Vehicle:95 Impreza EJ22T |
head scratching after rear disc conversion
Installed rear disc set up on my 95L. Other than normal expected problems(rusted bolts) got everything together. Took a long time to bleed the brake system to get all the air out, but seem to have a low pedal still. No brake warning light is on, and car can be driven, but not much pedal there......we have re-bled system with no improvement........ideas anyone???
The rear disc's I bought were used, off a WRX
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10-08-2003, 10:25 AM | #2 |
Scooby Specialist
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Join Date: Jun 1999
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South East
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Vehicle:2012 Geeteeeye and 71' VW Gulf Beetle |
Have you bled all 4 brakes each time?
I had this problem after my rear disk conversion... part was attributed to only bleeding the rears and the other part was a result of brand new pads in the rear. -Mike. |
10-08-2003, 11:08 AM | #3 |
Scooby Newbie
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Join Date: May 2002
Location: Oxford, UK
Vehicle:2002 2.5TS Blue Ridge |
You might need to bleed the master too.
In what order did you bleed the lines? This is the proper order for bleeding the lines : Code:
FRONT 3 1 2 4 REAR |
10-08-2003, 12:30 PM | #4 |
Scooby Guru
Member#: 177
Join Date: Aug 1999
Chapter/Region:
NWIC
Location: Austin, Texas, USA
Vehicle:The 93 W/EJ20K-sold Subaru-less :( |
which rear calipers did you use ?
this may be what you are expirancing they are not all the same size (piston).. stimpy did a sizeable amount of research here i bleieve he ended up changing his master cly |
10-08-2003, 01:17 PM | #5 |
Scooby Newbie
Member#: 10642
Join Date: Sep 2001
Chapter/Region:
MWSOC
Location: Omaha Nebraska
Vehicle:95 Impreza EJ22T |
All 4 have been bled each time. We havent bled the master cylinder. The order above is one of the orders we tried. Ive talked to a couple of experienced subaru techs and both said go from rr, rf, lr, lf. Ive tried bleeding methods in the shop manual and the chilton manual. Im trying gravity now. The rear calipers are stock WRX. A friend of mine locally did this swap using bigger calipers and the stock master cyl.
Thanks, Jim |
10-09-2003, 11:26 AM | #6 |
Scooby Newbie
Member#: 10642
Join Date: Sep 2001
Chapter/Region:
MWSOC
Location: Omaha Nebraska
Vehicle:95 Impreza EJ22T |
Well threw in the towel and took it to the dealer. Lucky for us we know both the service manager and the technician working on the car. When problem corrected I will post what fixed the problem.
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10-09-2003, 11:56 AM | #7 |
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MAIC
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hi, I have a 94 Impreza that came with four discs. I have the same horrible brake feel as you. I have also bleed the lines and am going to be upgrading my brakes. I'm thinking of replcaing the master cylinder in hopes of getting a better brake feel. My current brakes have massive fade, mushy pedal and a long almost to the floor pedal length. Let me know what the problem is.
thanks, micah |
10-09-2003, 01:22 PM | #8 |
Miss You Mom
Oct 1940 - Feb 2008 Super Moderator Member#: 809
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NESIC
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10-10-2003, 09:41 PM | #9 | |
Scooby Specialist
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BAIC
Location: Santa Clara CA
Vehicle:96 Impala SS (Former 02 WRX Wagon) |
Quote:
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10-11-2003, 06:29 PM | #10 |
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TXIC
Location: Houston, Tx
Vehicle:1990 Legacy & OB XT AWD 6MT EJ22T AWIC Swap |
What size MC do you have?
Also......did you start the car when you were bleeding. That one thing can make all the difference in the world. The difference in pressure generate by just adding the booster into the equation is huge, and can help push stubborn air towards the calipers. If you have too small a MC, it doesn't matter how much bleeding you do. You will have extended pedal travel. Only solution is to upgrade the MC to a larger bore then you currently have. |
10-16-2003, 10:20 PM | #11 |
Scooby Specialist
Member#: 43128
Join Date: Sep 2003
Location: SLC
Vehicle:92 RWD, 96 FWD 05 AWD |
ahh if you are stillhaving a problem try switching the calipers around. my buddy had 2.5 brakes on his l and we had the calipers on the wrong side and the brakes would not work. it was like there was always air in the system.
but what do i know? rick |
10-16-2003, 10:36 PM | #12 | |
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Quote:
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10-21-2003, 02:07 AM | #13 |
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Member#: 23269
Join Date: Aug 2002
Location: The "Safest" City in the USA
Vehicle:1998 Impreza Outback Red |
Maybe you should try reverse bleed, where you use something like a Mitivac and pump brake fluid into the bleeder instead of pumping fluid out of the bleeder. BTW, I want to do rear brake conversion on my OBS too. Do I just need a disc brake knuckle, calipers, and discs? Or is there other parts that I need to change out?
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10-21-2003, 10:36 PM | #14 | |
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10-22-2003, 12:46 AM | #15 |
Scooby Newbie
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Join Date: Aug 2002
Location: The "Safest" City in the USA
Vehicle:1998 Impreza Outback Red |
I just did that search, and this thread and the other one I also replied on are the only ones that came up...
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10-23-2003, 01:02 AM | #16 |
Scooby Newbie
Member#: 23269
Join Date: Aug 2002
Location: The "Safest" City in the USA
Vehicle:1998 Impreza Outback Red |
bump?
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11-14-2003, 01:43 AM | #17 |
Scooby Newbie
Member#: 23269
Join Date: Aug 2002
Location: The "Safest" City in the USA
Vehicle:1998 Impreza Outback Red |
ttt
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