Valve Seat

WARNING: This page is about a different car, the 2012 Subaru Forester. However, it is still accessible from the selected car via links, so may be relevant.

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.

Contacting width W between valve and valve seat:

Standard

Intake

0.6 - 1.4 mm (0.024 - 0.055 in)

Exhaust

1.2 - 1.8 mm (0.047 - 0.071 in)

Fig 1: Contacting Width W Between Valve And Valve Seat

Courtesy of SUBARU OF AMERICA, INC.

Fig 2: Correcting Contact Surfaces Using Valve Seat Cutter

Courtesy of SUBARU OF AMERICA, INC.