Chery A21 2005 Service Manual page 52

Clearance between piston pin and piston pin hole
5) Check the connecting rod journal and
the connecting rod bearing.
a. Check the diameter of connecting rod
journal.
Use micrometer caliper to measure the
connecting rod journal.
Rotate the crankshaft for 90°, and carry out
measurement.
Calculate the roundness and cylindericity
after two measurements.
Diameter
Roundness
Cylindericity
b. Check the radial clearance of connecting
rod bearing.
Use clearance gauge to measure the radial
clearance of connecting rod bearing. Firstly
clean the connecting rod journal and
connecting rod bearing, and then put the
clearance gauge onto the journal, and fasten
the bearing bush to specified torque.
Note: The crankshaft should not be rotated
during this process.
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Standard Wearing
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Standard size Wearing limit
0.002-0.013
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