Mazda 323 1988 Workshop Manual page 57

IA
INSPECTION AND REPAIR
Margin
thickness
Valve face
I-l-
Valve stem
Valve g
Valve and Valve Guide
1. Inspect each valve for the following, replace or
resurface as necessary.
(1) Damaged or bent stem
(2) Roughness or damage to the face
(3) Damage or uneven wear of the stem tip
2. Check the valve head margin thickness, replace
if necessary
Margin thickness
IN : 0.5 mm (0.020 in) min.
EX: 1.0 mm (0.039 in) min.
3. Measure the valve length.
Length
IN : 103.77 mm (4.0854 in)
EX: 102.67 mm (4.0421 in)
4. Measure the valve stem diameter.
Diameter
IN : 8.970-6.985 mm (0.2744-0.2750 in)
EX: 6.965-6.980 mm (0.2742-0.2748 in)
5. Measure the valve guide inner diameter.
Inner diameter
IN : 7.01-7.03 mm (0.2760-0.2768 in)
EX: 7.01-7.03 mm (0.2760-0.2768 in)
6. Measure the valve stem to guide clearance
(1) Method No. 1
~ I
Subtract the valve stem measurement from the
corresponding valve guide inner diameter
measurement.
l A--38