Geely CK Series 2007 Workshop Manual page 86

II. Crankshaft connecting rod noise diagnosis and troubleshooting
1. crankshaft connecting rod noise cause and troubleshooting
No. Noise area
Connecting rod
1
bearing noise
Main bearing
2
noise
Crankshaft
3 axial runout
noise
Flywheel
4
impact noise
2. Piston ring leakage, knock and noise causes and troubleshooting
Excessive piston ring backlash
Piston ring contra aperture
Insufficient elasticity of the piston ring
Poor seal between te piston and cylinder wall
Noise cause
Excessive connecting rod bearing radial
play
Connecting rod cover bolt loosened
Connecting rod bearing insert dimension
not as specified result in rotation or
rupture
Connecting rod bearing insert burned
Poor lubrication for connecting rod
bearing
Excessive main bearing raidal play
Main bearing cover bolt loosened
Main bearing insert burned
Poor lubrication for main bearing
Main bearing insert dimension not as
specified result in rotation or rupture
Excessive crankshaft bearing raidal play
Excessive wear of the cranshaft thrust
washer
Flywheel set bolt loosened
Noise cause
Piston ring broken
Piston ring is locked
Troubleshooting
Replace the bearing
Tighten
Replace the insert
Replace the insert
Drill the lubricant hole to normal,
improve the lubricant line
Replace the main bearing
Tighten
Replace the insert
Smoothen the lubricant line or
enlarge the oil hole
Replace the main bearing insert
Adjust (pad) to normal
Replace the thrust washer
Tighten
Elimination method
Replace
Replace
Correct (stagger)
Replace
Replace
Replace
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