Geely Emgrand X7. Manual part — 240

2.21.7.10 Drive Belt Chirp Diagnosis

Diagnostic Hints: The symptom may be due to wet drive belt or pulley and may be an
intermittent fault. Drive belt may need to spray a small amount of water to reproduce customer
reported fault. If the symptom reoccurs after spraying water, then clean the pulley. Loose or
unreasonable installation of body components, suspension components or other vehicle parts can
also cause the chirp sound.

Fault Definition: The following conditions are the drive belt chirp sound symptoms

z A chirp jack noise can be heard once the drive belt rotates a lap.

z Noise often happens on a rainy day or in a cold morning.

1

Verify the fault. Does the engine have chirp sound?

2

Dismantle the drive belt to confirm whether the giggle does not arise again?

A. Dismantle the drive belt. Refer to 2.13.8.3 Replacement of Drive Belt.

B. Run the engine, but no more than 30 s.

Does the scream disappear?

3

Inspect whether the drive belt surface is normal? (do not have ball, crack, etc)

Refer to 2.13.7.9 Drive Belt Inspection

4

Inspect whether the drive belt pulley is installed correctly? (do not happen
misalignment)

5

Inspect whether the drive pulley is normal?

Inspect whether the pulley is bent, twisted and so on.

No

Reinstall the drive pulley. If necessary,
replace the drive belt.

Yes

No

Refer to 2.6.8.3 Replacement of Drive Belt
to replace the drive belt.

Yes

No

Refer to 2.6.7.4 Engine Noise Diagnosis

Yes

Yes

To Diagnostic Hints

No

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6

Inspect whether all fasteners associated with the drive belt are normal?

7

Replace the drive belt. Confirm the fault is fixed.

No

Tighten loose fasteners.

Yes

No

Replace the failed pulley.

Yes

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2.13.7.11 Drive Belt Scream Diagnostic

Diagnostic Hints: Loose or unreasonable installation of body, suspension and other components
may cause screams. If there is intermittent noise, inspect the attached components by changing the
engine load. It is recommended to inspect whether the air-conditioning system is over filled,
power steering hose is clamped, the power steering fluid is correct or whether the generator is
faulty.

Fault Definition: The following conditions are the drive belt screams symptoms

z Scream is caused by drive belt slippage.

z Noise appears when a big load added to the drive belt, such as air-conditioning system

compressor starting, the running engine with the throttle quickly opening or drive belt
skidding in a drive component.

2

Dismantle the drive belt. Confirm whether the scream disappears?

A. Dismantle the drive belt. Refer to 2.13.8.3 Replacement of Drive Belt.

B. Run the engine, but no more than 30 s.

Does the scream disappear?

3

Inspect whether the bearings of all accessory drive belt pulleys are normal?

Pulley bearings do not appear stuck, loose and so on.

4

Inspect whether drive belt tensioner device is working properly?

Tensioner pulley bearing device does not appear stuck, loose. Tensioner device does not appear
loose and other damages.

1

Verify the fault. Does the engine scream?

No

Replace the drive belt tensioner assembly. Refer to
the 2.13.8.4 Replacement of Drive Belt Tensioner

Yes

No

Replace the damaged pulley or bearing.

Yes

No

Refer to 2.13.7.3 Engine Noise Diagnosis

Yes

No

To Diagnostic Hints

Yes

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5

Inspect whether the correct drive belt is used?

Refer to 2.13.7.4 “Drive Belt Inspection” to inspect for the extension of the drive belt.

6

Inspect whether all fasteners associated with the drive belt are normal?

7

Inspect whether the drive pulley is normal?

Inspect whether the pulley is bent, twisted and so on.

8

To Diagnostic Hints

No

Replace the failed pulley.

Yes

No

Tighten loose fasteners.

Yes

No

Refer to 2.13.8.3 Replacement of Drive Belt to
replace the drive belt.

Yes

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