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.
Hi sorry Iíve been away for the summer, but Iíve started racing single seatrs (not BMWs.)
Technically you should never push any brake piston back without opening the bleed nipple. This put back pressure on the master cylinder. Iíve never known it to cause a problem on BMís but it does hurt other make. As long as you close the nipple as before the fluid stop running out you have to bleed the brake.
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