Use pliers, BMW # 17 5 500, to open the clamp securing the coolant hose to the water pump (arrow) and disconnect the hose.
Disconnect ground cable (arrow) from cylinder.
Remove cylinder base screws.
Push the rear chain guide forward and carefully lift the cylinder clear.
Installation is the reverse of the removal procedure: pay particular attention to the following.
Note: When installing, use a new cylinder base gasket.
Oil the piston rings and press the sliding piston ring sleeve, BMW # 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).
Push the timing chain through the chain aperture in the cylinder and secure the chain.
Slip the cylinder over the piston.
Remove sliding sleeve.
Tightening torques:
- Cylinder to engine block: 10 Nm
- Ground cable to cylinder: 8 Nm