Removing the chain tensioner of cylinders 1-4

NOTE: TECHNICAL INFORMATION
The work must be performed with vehicle care to prevent component damage.

Press back the chain tensioner (2) using the tensioning rail.
Retain the piston on the chain tensioner with the special tool 0 491 012 (11 4120).
Loosen and remove the screws on the chain tensioner.

Courtesy of BMW OF NORTH AMERICA, INC.