Geely EC718, EC718RV, EC715, EC715RV. Manual part — 131

Flange Irregular Joints

If necessary, repair or replace the associated components.

Exhaust Manifold Cracked or Broken

Replace the exhaust manifold. Refer to

2.7.6.1

Exhaust Manifold

Replacement

.

Exhaust system components welded joints leakage

Replace the leaking parts.

2.7.5.5 Exhaust System Noise

When the engine is running, exhaust has noise or unusual sound. Check whether there is "Exhaust System Noise" fault, as shown
in the following table:

Crack sound or hiss

Exhaust system leaking. Refer to

2.7.5.4

Exhaust System Leakage

.

Exhaust sound too big

1. Compare with a vehicle known in good conditions.

2. Check the muffler for damage or malfunction. Replace the faulty muffler.

3. Refer to

2.7.6.3

Front Muffler Replacement

or

2.7.6.4

Rear Muffler

Replacement

.

External Noise or Vibration Noise

1. Check whether the hook is bent or loose or whether shrouds fasteners are

loose.

2. Check whether the exhaust pipe is interfered.

Internal Noise

1. With a rubber hammer knock these parts to confirm the noise.

2. Replace the faulty three-way catalytic converter or muffler. Refer to

2.7.6.2

Three-way Catalytic Converter Replacement

or

2.7.6.3

Front Muffler

Replacement

or

2.7.6.4

Rear Muffler Replacement

.

2.7.5.6 Exhaust System Repair Notes

Warning!

Refer to "Exhaust System Service Warning" in "Warnings and Notices".

Warning!

The broken three-way catalytic converter must be replaced. It is not allowed to remove three-way catalytic converter
exhaust system, otherwise there will be serious air pollution.

Note

In the following conditions, three-way catalytic converter may be damaged or malfunction:

–

Work outside the closed-loop mixture control system.

–

Engine burns a large amount of engine oil.

–

If the three-way catalytic converter exhaust temperature is too high, at more than 840°C (1544 ºF).

Note

–

Vehicles with three-way catalytic converter can not use leaded petrol. Lead will pollute the three-way catalytic
converter.

–

Do not drop the three-way catalytic converter, as this may damage the ceramic carrier.

–

Do not allow water, engine oil or fuel enter into the converter, because this may contaminate the ceramic substrate.

Engine

Exhaust System JL4G18-D

2-439

–

Do not start the vehicle when there is engine misfire or the spark plug wire is disconnected.

2-440

Exhaust System JL4G18-D

Engine

2.7.6 Removal and Installation
2.7.6.1 Exhaust Manifold Replacement

Removal Procedure:

Warning!

Refer to "Battery Disconnection Warning" in "Warnings
and Notices".

Note

Removing the bolt when it is hot is likely to damage the
bolt or flange nuts weld on the exhaust manifold.
Remove the bolt when the engine is cooled down.

FE02-0290b

1.

Disconnect the battery negative cable. Refer to

2.11.8.1

Battery Disconnection

.

2.

Remove the three-way catalytic converter left connecting
bolt.

FE02-0291b

3.

Remove the three-way catalytic converter right
connecting bolt.

Engine

Exhaust System JL4G18-D

2-441

FE02-0292b

4.

Remove heat shield to the exhaust manifold retaining
bolts.

FE02-0293b

5.

Remove the heat shield on the exhaust manifold.

3

4

1

5

2

FE02-0294b

6.

Remove the exhaust manifold bolts and nuts according to
the sequence in the graphic.

2-442

Exhaust System JL4G18-D

Engine