EM -34 ENGINE DOHC
VALVES
1. Using a wire brush, clean the valve thoroughly.
ECA9281A
2. Check
each valve for wear, damage and distortion of
the h
ead and the stem at B position. Replace, if nec-
essa
ry. If stem end, A, is hollowed out or worn, resur-
face
as necessary. This correction must be limited to
amin
imum. Also resurface the valve face.
Repl
ace the valve if the margin has decreased to less
than
the service limit.
Margin
[Standard]
Intake : 1.1 mm (0.043 in.)
Exhaust : 1.3 mm (0.051 in.)
[Limit]
Intake : 0.8 mm (0.028 in.)
Exhaust : 1.0 mm (0.040 in.)
Margin
ECKD221A
VALVE SPRINGS
1. Check the free height of each valve spring. If they
exceed the servicd limit, replace the springs.
2. Using a square, test the squareness of each spring.
If a spring is excessively out - of - square, replace it.
Valve spring
[Standard]
Free height : 44 mm (1.7323 in.)
Load :
21.6 kg/35 mm (47.6 lb/1.3780 in.)
45.1 kg/27.2 mm (99.4 lb/1.0709 in.)
Outofsquare: 1.5
[Limit]
Free height : - 1.0 mm (- 0.039 in.)
Out of square : 3
2˚
Free
height
Out-of-square
ECA9281C
Check the valve stem-to-guide clearance. If the clearance
exceeds the service limit, replace the valve guide with the
next oversize part.
Valve stem-to-clearance
[Standard]
Intake : 0.03 ~ 0.06 mm (0.0012 ~ 0.0024 in.)
Exhaust : 0.05 ~ 0.08 mm (0.0020 ~ 0.0031 in.)
[Limit]
Intake : 0.1 mm (0.0040 in.)
Exhaust : 0.15 mm (0.0059 in.)
Valve guide
Guide inside diameter
Stem diameter
ECA9281D
ZENITH POWER PRODUCTS - 416
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