gio Vyper 4WD 1100cc 4 seater XY1100UEL, Service Manual

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Chery QQ Service Manual
Mechanical Part of SQR 472Engine
6-24
of the assembly of cylinder head, slowly tighten these bolts
in the order as indicated in the right figure for several
times untill ther are tightened properly.
Notice : Remove the cylinder head bolts with a torque
socket wrench in the contrary order.
2.3 Disassembly of cylinder head and cylinder head
gasket
Notice : The cylinder head gasket is nonreusable.
2.4 Disassembly of valve adjustment gasket and valve
tappet
2.5 Disassemble the valve spring retainer lock, spring
retainer, spring seat, valve spring, intake valve, and
exhaust Valve etc with special tools.
2.6 Disassembly of valve oil seal and valve spring gasket
2.7 Cleanup
2.7.1 Clean the carbon dust on the valve.
2.7.2 Clean the bottom surface of cylinder head and the
surface of intake and exhaust manifold with scraper knife.
Notice : The surface of the cylinder head may not be
scratched in the course of cleanup.
Do not pollute the intake port and water passage.
3. Routine Inspection
3.1 Cylinder Head
Measure the flatness at each point with ring gauge as
indicated in the figure.
Cylinder head: 0.10mm
Surface of intake/exhaust manifold: 0.10 mm
。
3.2 Valve Spring
3.2.1 Measure the square degree of valve spring with
square. Replace if it exceeds the specified value.
Limit : 1.2mm