Chery QQ, Service Manual

Page: 43 / 635

Chery QQ Service Manual
Mechanical Part of SQR 472Engine
42
2.4 Inspect the crankshaft for its radial clearance.
2.4.1 Remove the crankshaft bearing cap by softly
tapping with a resin hammer.
2.4.2 Clean the inside and surface of the bearing bushing,
the inside and surface of the bearing cap, the cylinder wall
and journal. Inspect them for abrasion and damage
carefully.
2.4.3 Adjust the radial clearance of the crankshaft with a
clearance gauge, and tighten the bearing bushing cover
bolts with the specified torque.
Torque : 70
±
3.5N.m
Notice : After tightening the bolts, the rotating torque of
the crankshaft should be less than 1Nm
（
The torque of crankshaft without piston connecting rod
）
2.4.4 Remove the bearing cap and measure the maximum
width with a clearance gauge. If the measurement result
exceeds the limit, replace the bearing bushing.
Standard value : 0.025-0.069mm
Limit : 0.10mm
2.4.5 Remove the main bearing bushing cap of the
crankshaft, crankshaft, crankshaft bearing bushing and
crankshaft axial thrust plate
Notice : Tighten the bolts for the crankshaft bearing cap
in the order shown in the right figure. Tighten the bolts for
three times, then the torque must be up to the specified
value.
Protection Sleeve
Clearance Gauge
Width Compare of Clearance Gauge