
12.
SERVICE
DATA
“STD”
in
the following table is the parts dimension from the brand new engine
or
the spare parts.
Whereas, “Limit” shows the maximum allowance for the parts
to
be used
on
the engine.
If
the measurement exceeds beyond the “Limit”, the part needs to be replaced and/or repaired.
12-
1
CLEARANCE
DATA
AND
LIMITS
Unit:
rnrn
(in)
CYLINDER
HEAD
0
Flatness
Valve seat contact width
0
Valve guide inside dia.
ITEM
IN.
EX.
EH12,17
EH25
L
”
”
“
“
EH12/17/25
STD
LESS
THAN
0.05
(0.002)
0.7
-
1
.o
(0.028
-
0.039)
5.500
-
5.51
8
(0.21
65
-
0.21
72)
6.600
-
6.622
(0.2598
-
0.2607)
Limit
0.1
(0.004)
2.0
(0.079)
5.65
(0.2224)
6.75
(0.2657)
-
57
-
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