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he clutch release bearing on our BMW Bavaria started grinding about a month ago, so it was time to take the transmission out and replace the bearing.
I bought the bearing a while ago, before I started taking everything apart. I held off getting a new disk and pressure plate so I could check the thickness of the friction material on the clutch disk. It was 8.5mm, while the minimum thickness (for the outboard release lever) is 7.8mm. I ordered a new clutch disk (21 21 1 223 125) anyway and pressure plate (21 21 1 202 052).