Chery A21 2005, Service Manual, Page: 54 / 475

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7) Check the cylinder block
a: Check whether there is scuffing or piston
scraping on the cylinder wall. If the
defect exits, please dissection the
cylinder or and set with bushing or
replace it.
b: Use cylinder gauge to measure the inner
diameter and cylindericity.
Standard value
Limit
value
Cylindericity
Cylindericity=max. cylinder diameter-min.
cylinder diameter.
Measure the cylinder diameter in the A and B
directions, and calculate the cylindericity in
the two directions and select the max value.
3.2.3 Installation
1) Apply oil onto the piston pin and in the
piston pin hole, and use piston pin to
connect the piston with the connecting
rod, and then mount the piston pin
circlip.
2) Mount piston ring. Mount all the rings
onto the piston according to the
sequence: the bushing ring of oil control
ring upper and lower blades, second air
ring, first air ring. Observe the piston
ring direction when mounting various
rings: those with
“
TOP
”
onto it shall be
positioned upwards. Form an angle by
crossing the two blades and the bushing
ring, with the closed angle at the
bushing ring joint pointing at the piston
top, and the first ring and second ring
intersecting with the blades for 1200.
12 mm
Center
Bottom
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