Chery QQ Service Manual 465 Engine Mechanical System
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Chery Automobile Co., Ltd
Knocking noise while idling
heat start
Check the engine to see if it is under the following
circumstances:
l
Driving belt wear
l
Check tension , replace driving belt if necessary.
l
The compressor of air condition system
l
Replace parts if necessary .
l
Oil viscosity is not suitable.
l
Use oil with suitable viscosity according to estimated
temperature, see maintenance and lubrication for
reference.
l
Piston pin clearance is too big.
l
Replace piston and piston pin if necessary.
l
Calibrate location of connecting rod
l
Check connecting rod, replace if necessary.
l
Clearance of piston and cylinder liner is not enough.
l
Bore cylinder , install new piston
l
Adjust looseness or torque of crankshaft balancer.
l
Replace wearing parts
l
Make sure that the direction of piston pin is right.
l
Install piston correctly.
Slight pinking sound while
heat start.
Check to see if the engine is under the following
conditions:
l
Detonation or ignition knock
l
See engine control system for reference.
l
Exhaust manifold leak gas.
l
Fasten bolt or replace gasket
l
Clearance of connecting rod bearing is too big.
l
Replace connecting rod bearing if necessary
Severe knocking sound Check to see if the engine is under the following
