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nelsonmay10
Joined: 17 Apr 2005 Posts: 115 Location: Charlotte, NC
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Posted: Sat Mar 14, 2009 10:53 pm Post subject: Brake question for 325i |
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I have a 6cly 1990 convertible and have a break pedal that depresses to the floor when the car starts. After a little driving the pedal has tension. Anyway, it started doing this and I changed the front brake pads. I left the top off the brake fluid reservoir and pressed the pedal lightly to make sure there was air in the reservoir. My ABS light also comes on.
Anyway, it is acting up again and this only happens when the car starts or has not been driven for a long period of time. (2-4 hours).
Before I go digging, could I have air in the lines, due to a crack? I don't see brake fluid leaking. Or should I look for something else?[/i] |
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idanity
Joined: 21 May 2005 Posts: 3097 Location: N.W.U.S.A.
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Posted: Sun Mar 15, 2009 1:41 am Post subject: |
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definate air in the lines.
as fluid cannot compress, and air/ gas can compress.
the air in the system may get compressed enough to be squished in the line, and stay that way until the car shuts off, and releases its pressure build up.
sounds like a nice time for a full bleed _________________ .......... |
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beejay
Joined: 18 Nov 2002 Posts: 1158 Location: Eastern, Pa
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Posted: Sun Mar 15, 2009 8:37 am Post subject: |
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sounds more like the master cylinder is failing _________________ Bob
92 325ic gone
14 BRZ ltd
05 Tundra SR5 TRD
01 VFR800fi - 03 DR650S - 83 CB1100F - 82 CB900F - 69 CB750 |
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nelsonmay10
Joined: 17 Apr 2005 Posts: 115 Location: Charlotte, NC
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Posted: Sun Mar 15, 2009 1:36 pm Post subject: RE: |
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To make sure I have a full bleed correct, do I bleed one tire at a time while topping of fluid, or do I drain the system and start over with bleeding one tire at a time. |
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85-325e
Joined: 30 Jun 2002 Posts: 4712 Location: Southampton, NY
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Posted: Sun Mar 15, 2009 3:43 pm Post subject: |
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Nelson... You start with the furthest wheel away... the rear passenger side... then do the rear driver's side, the the front passenger side and then the front driver, then the clutch slave if applicable (later models had a seperate line for the clutch slave).
You should probably use a different color fluid. Last time I did mine, I used the blue fluid and had gold in there before. The color differentiation lets you really know when the entire line is filled with new fluid.
You dont' drain the entire system. you do it as stated above, and new fluid will replace all the old fuild as you do it. Make sure you keep the reservoir topped up so you don't introduce air into the system. A pressure bleeder helps a lot of you're doing it alone. _________________ Cosmo - 1985 BMW 325e, Single Owner, 265,000+ ORIGINAL miles and still going strong! But now on the East Coast and the salt air corrosion is eating my beautiful car alive...
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dale
Joined: 22 Aug 1999 Posts: 3087 Location: Seattle, WA USA
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