Valve Seat Width Measurement Procedure

WARNING: This page is about a different car, the 2007 Suzuki XL7. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Measuring Valve Seat Width In Cylinder Head

Courtesy of SUZUKI OF AMERICA CORP.

Measure the valve seat width in the cylinder head using a proper scale.

Fig 2: Identifying Seat Width On Valve Face
Courtesy of SUZUKI OF AMERICA CORP.
Measure the seat width on the valve face (1) using a proper scale.
NOTE: The seat contact area must be at least 0.5 mm (0.020 in) from the outer diameter (margin) of the valve. If the contact area is too close to the margins, the seat must be reconditioned to move the contact area away from the margin.
Compare your measurements with the specifications listed in ENGINE MECHANICAL SPECIFICATIONS .
If the seat widths are acceptable, check the valve seat roundness using the VALVE SEAT ROUNDNESS MEASUREMENT PROCEDURE .
If the seat width is not acceptable, you must grind the valve seat using the VALVE AND SEAT RECONDITIONING PROCEDURE to bring the width back into specification. Proper valve seat width is critical to providing the correct amount of valve heat dissipation.