Chery QQ Service Manual 465 Engine Mechanical System
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Chery Automobile Co., Ltd
whether or not there are some blocked bearing.
6 Hooting noise of driving belt
Step
Operation
Yes
No
Definition: Successive high pitch noise can be generated because of bearing malfunction.
1
Check to see whether or not there is some damage
of accessories bearing.
Is there any noise resulting from the bearing?
To step2 System normal
2
Install new parts according to the request.
Is the maintenance completed?
System
normal
—
7 Rumbling noise of driving belt
Step
Operation
Yes
No
Definition: Low and deep slapping noise may be resulted from malposition of driving belt.
This kind of noise happens while idling cold .
One low-frequency noise can be heard when the driving belt rotate every one circle.
1
Check to see whether or not there is any severe hollowness.
Is there any severe hollowness exceeding 1/3 depth of the belt
rib?
To step2
System
normal
2
Clean belt pulley of driving belt.
Is the maintenance completed?
System
normal
To step3
3
Install new driving belt, see “replacement of driving belt” for
reference.
Is the maintenance completed?
System
normal
—
8 Diagnosis of driving belt vibration
Step
Operation
Yes
No
Definition: Vibration has something to do with the engine speed, vibration may be sensitive
to the accessories load.
1
Check to see whether or not the driving belt is wearing,
damaged, accumulated dusts or losing reinforcement.
Is there any damage or wear of the driving belt?
To step2 To step3
2
Replace the parts accordingly, see the replacement of
transmission belt” for reference. do you finish the
maintenance?
To step3
—
3
Check to see whether or not the fastener is loose or lost.
To step4 To step5
