Cylinder Head And Valves: Inspection: Valve

WARNING: This page is about a different car, the 2014 Mitsubishi Outlander. However, it is still accessible from the selected car via links, so may be relevant.

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: Inlet 1.022 mm (0.0402 inch) Exhaust 1.094 mm (0.0431 inch)

Limit: Inlet 0.522 mm (0.0206 inch) Exhaust 0.594 mm (0.0234 inch)

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

Standard value: Inlet 112.27 mm (4.420 inch) Exhaust 113.07 mm (4.452 inch)

Limit: Inlet 111.77 mm (4.400 inch) Exhaust 112.57 mm (4.432 inch)

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