Caution! Note the mark on the exhaust side of the crown applied on disassembly.
Install the piston.
Press the piston pin in with drift, BMW No. 11 6 581.
Install piston pin circlip with mandrel, BMW No. 11 6 581, and adapter, BMW No. 11 6 583.
Assembly sequence:
Place piston pin circlip (2) flat on bench.
Place sleeve (1) over the single-hook circlip (2) so that the ring gap is opposite the flat on the sleeve and the hook is in the groove.
Press the circlip into the sleeve.
Using the domed side of assembly drift (3), push the circlip in as far as possible.
Turn the assembly drift round and push in the circlip until seated in the groove.
Position sleeve, BMW No. 116583, with installation arbor, BMW No. 11 6 581, against piston.
Caution! Support side of piston.
Press piston pin circlip into piston with firm pressure.