Chery QQ, Service Manual

Page: 44 / 635

Chery QQ Service Manual
Mechanical Part of SQR 472Engine
43
2.5 Disassembly and assembly of the piston and
connecting rod assembly
2.5.1 Remove the first ring, second ring and the oil
ring with a pair of piston ring moving pliers.
Notice : Don
’
t get the piston and piston ring of each
cylinder confused.
2.5.2 Remove the piston, connecting rod and the
piston pin with special tool.
Disassemble the piston pin with special tool as indicated in
the right figure.
①
As indicated in the right figure, disassemble the piston
which is at the state mentioned above with special
tools. Remove the piston pin with special tool, and
then remove the piston and the connecting rod.
3 Cleanup
3.1 Cylinder Body
Warning: In the course of cleanup, protect your eyes
with eyeglass.
3.1.1 Clean up the cylinder body, cylinder head, oil
pan, oil pump and the oil seal with a flat blade.
3.2 Piston
Warning: In the course of cleanup, protect your eyes
with eyeglass.
3.2.1 Use an old ring to remove the carbon in ring
groove.
3.2.2 Remove the carbon of parts with scavenger.
Notice : Don
’
t use hard articles such as metal brush.
Special Tool
Special Tool