Fit cylinder base gasket on engine housing: oil bore must be clear.
Oil the piston rings and press the sliding piston ring sleeve, BMW No. 11 6 510, over the piston rings from above so that the piston projects from the sliding sleeve by about 2 mm (0.08 in).
Slide timing chain and wire through chain aperture of cylinder, then slide cylinder over piston.
Remove sliding sleeve.
Secure cylinder to engine housing hand-tight.