江淮汽车 部门：客户服务部
Mechanical Part of
Engine
Measure the gap between the connecting rod and
the crankshaft by using feeler gauge.
Standard value: 0.10-0.3mm
Limit: 0.4mm
If the limit is exceeded, replace the connecting rod
and measure again. Replace the crankshaft if
measurement is still out of the limit.
③
Side clearance of Piston Ring
Measure the side clearance between piston ring
and piston ring groove top land by the feeler
gauge.
Standard values:
For 1
st
piston ring, 0.03
～
0.07mm
For 2nd piston ring, 0.04
～
0.06mm
Limits:
For 1
st
piston ring, 0.1mm
For 2
nd
piston ring, 0.1mm
If the measurement exceeds the limit, replace the piston ring, and then remeasure the gap. Replace the
piston if the measurement is still out of the limit.
④
End Gap of Piston Ring
Ensure that the inner diameter of cylinder stays
within the specified range.
See "Cylindricality of Cylinder"
Lubricate the piston and the piston ring with new
engine oil, then insert the piston ring till the piston
reaches the middle part of cylinder, measure end
gap of piston ring by the feeler gauge.
Standard values:
For 1
st
piston ring, 0.20-0.35mm
For 2
nd
piston ring, 0.35-0.50mm
Limits:
Fig.1.1.059
Fig.1.1.057
Fig.1.1.058
Piston Ring
Feeler Gauge
Good
Feeler
Gauge
Bad
Feeler
Gauge
Piston
Piston
Ring
Piston
Ring
Measured Point
Pressed and Fixed
