Mazda 323 1988 Workshop Manual page 60

INSPECTION AND REPAIR 1
A
Seat contact
EX
IN
5. Check the seat contact width and valve seating po-
sition on the valve face.
Width:
1 .1-l .7 mm (0.043-0.067 in)
6. Check that the valve seating position is at the cen-
ter of the valve face.
(1) If the seating position is too high, correct the
valve seat using a 7.5O cutter, and a 45O cutter.
(2) If the seating position is too low, correct the
valve
seat using a 35O (IN) or l5"
(EX),
and
a 45O cutter.
7. Seat the valve to the valve seat using a lapping
compound.
8. Check the sinking of the valve seat.
Measure protruding length (dimension "L") of the
valve stem.
Dimension "L": 39.0 mm (1.535 in)
(1) If
"L"
is as below, it can be used as it is
39.0-39.5
mm (1.535-l .555 in)
(2) If
"L"
is as below, insert a spacer between the
spring seat and cylinder head so that
"L"
will
be as specified.
39.5-40.5 mm (1.555-l ,594 in)
(3) If
"L"
is more than as below, replace the cyl-
inder head.
40.5
mm (1.594 in) or more
Valve Spring
1, Inspect each valve spring for cracks or damage.
2. Check the free length and angle, replace if
necessary.
Free length
Standard: 43.7 mm (1.720 in)
Minimum: 42.3 mm (1.665 in)
1
A-41