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Chery QQ Service Manual
Mechanical Part of SQR 472Engine
45 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. Standard value: 72 013 . 0 025 . 0 φ - -
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) Limit (mm) First ring 0.03~0.06
0.12 Second ring 0.03~0.06
0.11
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) Limit (mm) First ring 0.25-0.40 0.65 Second ring 0.35~0.50
0.65 Oil ring 0.20~0.70
1.00
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