Valves And Cylinder Head Inspection; Valve Guides - Suzuki Swift User Manual

ENGINE MECHANICAL (G13B, 1-CAM 16-VALVES ENGINE) 6A1-45
INSPECTION

Valve Guides

Using a micrometer and bore gauge, take diameter readings on
valve stems and guides to check stem-to-guide clearance.
Be sure to take reading at more than one place along the length of
each stem and guide.
If clearance exceeds limit, replace valve and valve guide.
Item
5.465 – 5.480 mm
In
(0.2152 – 0.2157 in.)
Valve stem
diameter 5.440 – 5.455 mm
Ex
(0.2142 – 0.2148 in.)
In
Valve guide g 5.500 – 5.512 mm
I.D. Ex (0.2166 – 0.2170 in.)
0.020 – 0.047 mm
In
(0.0008 – 0.0018 in.)
Stem-to-guide g
clearance
0.045 – 0.072 mm
Ex
(0.0018 – 0.0028 in.)
If bore gauge is not available, check end deflection of valve stem
with a dial gauge instead.
Move stem end in directions (1) and (2) to measure end deflection.
If deflection exceeds its limit, replace valve stem and valve guide.
Valve stem end
deflection limit
Valves
D Remove all carbon from valves.
D Inspect each valve for wear, burn or distortion at its face and stem
and, as necessary, replace it.
D Measure thickness "a" of valve head. If measured thickness ex-
ceeds limit, replace valve.
Valve head thickness
Standard
In
0.8 – 1.2 mm
(0.03 – 0.047 in.)
Ex
Standard
0.07 mm
(0.0027 in.)
0.09 mm
(0.0035 in.)
In 0.14 mm (0.005 in.)
Ex 0.18 mm (0.007 in.)
Limit
0.6 mm (0.024 in.)
0.7 mm (0.027 in.)
Limit
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–
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