Master Cylinder: Assembly

WARNING: This page is about a different car, the 2013 Subaru Forester. However, it is still accessible from the selected car via links, so may be relevant.

Apply a coat of grease to the contact surfaces of the push rod and piston before installation.
Grease:

SILICONE GREASE G-40M (Part No. 004404003) or equivalent

Fig 1: Identifying Grease Applying Areas On Contact Surfaces Of Push Rod And Piston
Courtesy of SUBARU OF AMERICA, INC.
Assemble in the reverse order of disassembly.
Tightening torque:

10 N.m (1.0 kgf-m, 7.4 ft-lb)