Cylinder Head And Valves: Inspection: Valve

WARNING: This page is about a different variant/trim than selected.

Repair the valve seat if contact with the valve seat is poor, uneven or broken.
Measure the margin.
If the limit is exceeded, replace the valve.

Standard value:

Intake 1.022 mm (0.0402 inch)

Exhaust 1.094 mm (0.0431 inch)

Limit:

Intake 0.522 mm (0.0206 inch)

Exhaust 0.594 mm (0.0234 inch)

Fig 1: Identifying Valve Seat Contact Facet Margin
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
Measure overall length of the valve.
If the limit is exceeded, replace the valve.

Standard value:

Intake 113.18 mm (4.456 inches)

Exhaust 105.89 mm (4.169 inches)

Limit:

Intake 112.68 mm (4.436 inches)

Exhaust 105.39 mm (4.149 inches)

Fig 2: Identifying Valve Length
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.