Chery QQ Service Manual page 46

Chery QQ Service Manual
4.2.4 Measure the diameter of the piston
4.2.4.1 Measure at about 11 mm to the bottom of the
piston, along the direction vertical to the piston pin.
φ
72
Standard value:
4.2.5 Inspect the clearance between the piston ring and
the ring gloove
4.2.5.1 Measure around the ring gloove with a piston
ring and a feeler gauge
Standard value
(mm)
0.03~0.06
First ring
Second
0.03~0.06
ring
4.2.6 Inspect the end clearance of piston ring
4.2.6.1 Put the piston ring 45mm below the top surface
of the cylinder hole. Press down the piston ring with the
piston head, and then measure the opening with a feeler
gauge.
Standard value
(mm)
First ring 0.25-0.40
Second
0.35~0.50
ring
0.20~0.70
Oil ring
-
. 0 013
-
. 0 025
Limit
(mm)
0.12
0.11
Limit
(mm)
0.65
0.65
1.00
Mechanical Part of SQR 472Engine
45