Valve Seats; Seating Contact Width - Suzuki Samurai 1986 Service Manual

Check end face of each valve stem for wear.
l
This face meets rocker arm intermittently
'in operation, and might become concaved or
otherwise irregular. As necessary, smoothen
the end face with an oil stone and, if this
grinding removes the end stock by as much as
0.5 mm (0.0196 in.) (as measured from the
original face), replace the valve.
Limit on stock allowance
of valve stem end face
Check each valve for radial runout with
l
dial gauge and "V" block. To check runout,
rotate valve slowly. If runout exceeds limit,
replace valve.
Limit on valve head
radial runout
Fig.

Valve Seats

CAUTION :
Valves to be checked and serviced for seat-
ing width and contact pattern must be those
found satisfactory in regard to stem clearan-
ce in the guide and also requirements stated
on preceding page under valves.

Seating contact width:

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Produce contact pattern on each valve in the
usual manner, namely, by giving uniform coat
of marking compound to valve seat and by
rotatingly tapping seat with valve head.
Valve lapper (tool used in valve lapping)
must be used.
mm
0.5
(0.0196 in.)
a
mm (0.003 in.)
0.08
I
The pattern produced on seating face of valve
must be a continuous ring without any break,
and width 6@ of pattern must be within
stated range as follows.
width revealed
Fig.
Fig. 3-5-14
(0.0512 - 0.0590 in.)
3-21