Geely Emgrand X7. Manual part — 239

8

Inspect the piston pin offset. Does it exceed the specified value?

Standard value (0 . 6mm/0 . 0236in)

9

Confirm that the fault is fixed.

Yes

Repair the fault part to confirm whether
the fault is removed.

No

Yes

Replace failed components, confirm
whether the fault is fixed.

No

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2.13.7.8 Engine Misfire with Abnormal Noise

1

Inspect whether engine control system has fault code through fault diagnostic unit?

2

Use fault diagnosis tester to inspect the engine "Knock" data, compared with the
normal vehicle data. Is it normal?

3

Inspect valve spring and check whether it is too soft and broken?

4

Inspect valve whether there is catching and bending?

5

Inspect valve whether it is stretched, stagnant or worn.

6

Inspect whether there are excessive cam wear or obvious faults?

7

Inspect valve for the existence of cracks, excessive wear and tear and other faults?

Yes

Repair the faulty part. Refer to 2.6.8.15 Cylinder
Hood Assembly Disassembly and Assembly

No

Yes

Replace camshaft, Refer to“2 . 6 . 8 . 12 replace
camshaft” .

No

Yes

Repair the faulty part. Refer to 2.6.8.15 Cylinder
Hood Assembly Disassembly and Assembly

No

Yes

Repair the faulty part. Refer to 2.6.8.15 Cylinder
Hood Assembly Disassembly and Assembly

No

Yes

Repair the faulty part. Refer to 2.6.8.15 Cylinder
Hood Assembly Disassembly and Assembly

No

Yes

Inspect whether the fuel is normal. Inspect whether the
timing system is normal. Repair the faulty part. Confirm
whether the fault is fixed.

No

Yes

According to the DTC code, repair the faulty part.
Refer to the2.2.7.11 DTC Code Index

No

956

8

Inspect valve spring seating and the valve spring washer. Is the installation incorrect?

9

Confirm that the fault has been fixed.

Yes

Repair the faulty part. Refer to 2.6.8.15 Cylinder
Hood Assembly Disassembly and Assembly

Next

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2.13.7.9 Drive belt inspection

1. Inspect when the engine is cool

or has been turned off for 30 min.

2. Visually inspect whether there is

V-drive belt excessive wear or
cord wear. If faults are found,
replace the V-drive belt.

3. Visually inspect the interior and

edge of the belt for damage, wear
or cracking. If any, replace it
with new belt.

4. Visually inspect whether there

are situation 2 and 3 on belt, and
measure belt tensioning
force :Clockwise turning two
rounds of the crankshaft belt
pulley to evenly distribute the
belt tension between each belt
pulley.

5. Use the sound pressure meter (via

the repair tools) to measure the
tension and frequency of the belt
at the marking point A.

损坏老化的传动皮带

传动皮带安装

正确配合

A

FE02-7000b

New belt

Old belt

Belt tension (N/lb)

400±-500/89.9±-112.4 300±-400/67.4±-89.9

A. Replace with new drive belt. Rotate the crankshaft two laps clockwise, so that the drive belt

completely runs through the drive pulley. Measure the tension at marked position A. Refer to
the table for the range and replace the drive belt if the measurement is beyond the scope of
the table.

B. f the used drive belt (the old belt) has the tension beyond the scope of the table, replace it

with a new drive belt.

C. During the drive belt installation, please make sure the correct installation to the drive pulley

groove.

D. Do not drop engine oil or engine coolant onto the drive belt.

E. Do not over-wind or bend the drive belt.

Damaged and aged drive belt

Drive belt installation

Correct matching

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