Chery A21 2005, Service Manual, Page: 39 / 475

30
Standard
value
Limit
value
IN
￠
5.98
±
0.008 Outer diameter
of valve stem
(mm)
EX
￠
5.96
±
0.008
IN
￠
5.4
±
0.1 Inner diameter
of valve guide
(mm)
EX
￠
5.4
±
0.1
IN 0.02 Clearance
(mm)
EX 0.04
IN 0.3
±
0.15
Thickness of
value top
（
mm
）
EX 0.3
±
0.15
2.2.3 Installation
The installing steps are reverse to those for
removal.
Note:
1) Dismantle the valve springs in two groups
with 1st and 4th cylinders in one group, 2nd
and 3rd cylinders in the other group. When
the piston runs tothe top dead center of 1st
and 4th pistons, you should dismantle the
valve springs of the 1st and 4th cylinders,
replace the valve oil seal, and mount valve
springs immediately. When the piston runs to
the top dead center of2nd and 3rd cylinders,
you should replace the valve oil seal. Thus,
you can prevent the valve from falling into
the cylinders, reducing unnecessary troubles.
2) Apply engine lubricant onto the oil seal lip
when installing the valve oil seal.
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