Valve Seat

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.

Inspect the intake and exhaust valve seats of cylinder head, 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:

Intake

Standard

0.8 - 1.6 mm (0.031 - 0.063 in)

Exhaust

Standard

1.1 - 1.7 mm (0.043 - 0.067 in)

Fig 1: Identifying Contacting Width Between Valve And Valve Seat

Courtesy of SUBARU OF AMERICA, INC.

Fig 2: Creating Gap Between Valve Seat Correcting Surface

Courtesy of SUBARU OF AMERICA, INC.