Suzuki 2000 Grand Vitara SQ625 Service Manual page 288

6A1-46 ENGINE MECHANICAL (G16 ENGINE)
D Inspect valve stem end face for pitting and wear. If pitting or wear
is found there, valve stem end may be resurfaced, but not so
much as to grind off its chamfer. When it is worn so much that its
chamfer is gone, replace valve.
D Seating contact width:
Create contact pattern on each valve in the usual manner, i.e., by
giving uniform coat of marking compound to valve seat and by ro-
tatingly tapping seat with valve head. Valve lapper (tool used in
valve lapping) must be used.
Pattern produced on seating face of valve must be a continuous
ring without any break, and the width of pattern must be within
specified range.
Standard seating width revealed g
by contact pattern on valve face
In
1.1 – 1.3 mm
(0.0433 – 0.0512 in.)
Ex