Valve Seat

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

Valve seat width: W 

Intake (A) 

1. Standard:  1.1 mm (0.043 in)
2. Limit:  1.8 mm (0.071 in)

Exhaust (B) 

1. Standard:  1.5 mm (0.059 in)
2. Limit:  2.2 mm (0.087 in)
   Fig 1: Inspecting Intake & Exhaust Valve Seats (1 Of 2)

   Courtesy of SUBARU OF AMERICA, INC.
   Fig 2: Inspecting Intake & Exhaust Valve Seats (2 Of 2)

   Courtesy of SUBARU OF AMERICA, INC.