Valve Seat

WARNING: This page is about a different variant/trim than selected.

Inspect the intake and exhaust valve seats, and correct the contact surfaces with a valve seat cutter if they are defective or when valve guides are replaced.

Valve seat width W:

Standard:

Intake (A)

0.8 - 1.4 mm (0.03 - 0.055 in)

Exhaust (B)

1.2 - 1.8 mm (0.047- 0.071 in)

Fig 1: Identifying Valve Seat Width

Courtesy of SUBARU OF AMERICA, INC.

Fig 2: Applying Valve Seat Cutter In Valve Seats

Courtesy of SUBARU OF AMERICA, INC.