SsangYong Actyon Sports II. Service manual - part 27

04-4

2. INSPECTION

1) Troubleshooting

When Abnormal Noises are Heard from the Engine Room

▶

For the vehicle equipped with DI engine, if a learning noise occurs in each range or other noises 

occur, the major cause of it is a faulty turbocharger assembly. But an interference issue, poor 

tightness or loose in the intake and exhaust system also can cause those noises. This is mainly 

because the operator didn't follow the instruction exactly when reconnecting the intake hoses and 

pipes which were disconnected to check the system or replace the air cleaner. If the intake system is 

free of any faults, check the EGR and PCV oil separator connected to the intake system.

The figure may be different from the actual engine. Therefore, read thoroughly below before replacing 

the parts.

2) Abnormal Noise Caused by Poor Tightness of Intake System

When the DI engine is running, the air entered into the engine flows in the sequence as shown above. If 

high intake pressure is applied to the loose or damaged part, a whistling noise may occur, the intake air 

volume is measured incorrectly or the engine power is derated.

04-5

1719-00

3) Troubleshooting Sequence

The basic checks for intake system are as follows:

Basic Checks for Intake System

▶

Make sure to replace or clean the air cleaner 

element periodically. Otherwise, engine will be 

derated or work abnormally because of low 

intake air volume. 

Unlike the fuel system, which is a closed 

circuit, the intake system is an open circuit 

system. Therefore any malfunction may occur 

due to dust and dirt. 

Most of the connections consist of hoses so 

the system cannot withstand high temperature 

and pressure. Also it can be deformed or 

loosened easily because it is a clamp 

mounting system. Thus, when checking the 

engine, basic inspections, such as tightened 

status check and visual inspection for hose, 

etc., should be carried out in advance.

Other Checks for Intake System

▶

If the intake system is free of any faults, check 

for EGR and PCV oil separator.

04-6

1. OVERVIEW

The intake system for D20DTR engine is equipped with a throttle body which includes a flap. This flap is 

controlled by an electrical signal to cut off the intake air entering to the engine when the ignition switch is 

turned off. Because of this, the shape of the intake manifold has been changed and improved HFM 

sensor is newly adopted to control the intake air volume more precisely.

2. COMPONENT

2330-01 Intercooler 

assembly

2313-15 HFM 

sensor

HFM sensor, version 6

*For more information, refer to Chapter "Engine 

Control".

2313-01 

Air cleaner assembly

04-7

1719-00

1719-02 

Swirl control valve

Operating variably in accordance with the engine 

load and rpm.* For more information, refer to 

Chapter "Engine Control".

1719-01

Intake manifold

Passage for variable swirl valve and for intake air

1719-16 

Electric throttle body

* For more information, refer to Chapter "Engine 

Control".