Chery A21 2005, Service Manual, Page: 411 / 475

CHERY A21 SERVICE MANUAL MECHANISM OF 2.0NALC ENGINE
22
f: Examine the protruding capacity of
valve stem.
And Examine the protruding high of valve
stem with vernier caliper.
（
See picture
）
Standard Value
（
mm
）
Protruding Capacity
Of Intake Valve
stem
47.5
Protruding Capacity
Of Exhaust Valve
stem
47.5
5) Examine the axial clearance of camshaft.
Replace the camshaft if the value of axial
clearance exceeds the normal value.
Standard Value
Intake camshaft 0.015
—
0.02
Exhaust camshaft 0.015
—
0.02
6) Examine the planeness of cylinder
a: Clear the lower surface of cylinder head.
b: With the help of ruler and feeler gauge,
check whether the lower surface of
cylinder head is warped.(Measure it in
the sequence of A, C, D, E, F, G in the
picture)
Standard
Value
Cylinder head planeness 0.04
Top of Valve Stem
Protruding High of Valve Stem
Seat of Valve Spring
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