Quote:
Originally Posted by Greeners
when you re-assemble, put the two seals together in the tank then fit the filter unit.
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Two seals? I only have a single seal on the tank port. It only fits one way and as you say, must be fitted onto the port rim before lowering the filter module on top, followed by the locking ring. The locking ring should easily screw on by hand. If you have to sit on it to start the thread, the seal isn't in the correct position. The original BMW seal is marked with the words 'This Side Down', but I don't know if they still are.
TC