BMW E90 clutch rattles or knocks when the pedal is pressed
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Why does the E90 clutch rattle or knock when I press the pedal?
A rattle or knock when the clutch is pressed usually points to the dual-mass flywheel, which has developed play with wear. The clutch release bearing can also cause the noise. A common repair is to replace the flywheel and the clutch kit together.
What should be replaced at the same time as the flywheel and clutch?
Replace the flywheel mounting bolts with new ones and consider renewing the crankshaft rear seal. If the seal starts to leak later, the clutch has to be taken apart again. It is worth ordering the bolts separately from a parts shop.
Can the rattle come from somewhere other than the clutch?
Yes. The grommet at the base of the gear lever can be poorly seated and let noise into the cabin, even though the engine sound has not changed. Check the grommet before bigger jobs.
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