Inspect Valve Seats

(a) Apply a light coat of prussian blue to the valve face.

(b) Lightly press the valve face against the valve seat.

(c) Check the valve face and valve seat according to the following procedure:

(1) If prussian blue appears 360° around the valve face, the valve face is concentric. If not, replace the valve.

(2) If prussian blue appears 360° around the valve seat, the guide and valve face are concentric. If not, resurface the valve seat.

(3) Check that the valve seat contact is in the middle of the valve face with the width between 1.0 to 1.4 mm (Intake side (0.039 to 0.055 in.)).

(4) Check that the valve seat contact is in the middle of the valve face with the width between 1.2 to 1.6 mm (Exhaust side (0.047 to 0.063 in.)).

Do It Yourself Car Diagnosis

Do It Yourself Car Diagnosis

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