The servo of my M3 is rusty in places and the master cylinder needs new seals and a clean.
I removed the concertina plastic boot after having looked at the ETK drawing and expected to see some kinda air filter underneath , but nothing. Peering down where the push rod exits, you can see a foam like substance that seems disintegrated.
The back of the servo has a metal sealing cap covering it , but which doesn't seem to show up as any part in the ETK.
So is the foam like substance the air filter that is under this cap ? I was reluctant to try and remove the cap as it doesn't seem available.
Thanks
Brake servo
Moderator: martauto
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Cloggy Saint
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The gasket between the servo and bulkhead is made of foam so it's probably the remains of that.
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BMG
- E30 Zone Regular
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Can't be. This is under the rubber boot and right down into the servo and a different colour material to the gasket I removed.