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3-Series (E21, E30) Chat relating to the BMW 3-Series from 1975-1983 and 1984-1991 line. Specific models: BMW 315, BMW 316, BMW 318, BMW 318i, BMW 320/4, BMW 320i, BMW 320/6, BMW 323i, BMW 320i. E30 Family models include: BMW 325e, BMW 325i, BMW 325is, BMW 325ix.

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Old 09-10-2005, 07:04 PM   #1 (permalink)
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brake vacuum servo

I can hear a hiss noise when I push the brake pedal, like escaping air, is the unit stuffed? The brakes works, but you have to push hard.
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Old 09-11-2005, 01:48 AM   #2 (permalink)
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Other than that do your brakes work normaly?
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Finally pulled the M50 from the donor car.
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Old 09-11-2005, 05:22 AM   #3 (permalink)
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I wouldn't call it normaly, slow to react. Just put new pads on, and no leaks.
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Old 09-11-2005, 01:19 PM   #4 (permalink)
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To test a servo turn off the engine pump the brake pedal until itís hard press down on the pedal and start the engine, the pedal should sink further with the force of the servo
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