Valve Seat

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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 of valve seat W:

Standard

Intake

1.0 mm (0.039 in)

Exhaust

1.5 mm (0.059 in)

Fig 1: Intake And Exhaust Valve Seats Inspection Area

Courtesy of SUBARU OF AMERICA, INC.