SsangYong Actyon Sports II. Manual - part 15

02-26

Intake/Exhaust Camshafts

2) Camshaft

(1) Overview

Hollow type camshaft contains cam, octagon cam, HP pump gear and intake/exhaust gears.

Camshaft operates the intake/exhaust valves, vacuum pump and HP pump, and transfers the engine 

oil to vacuum pump through the internal oil passage.

(2) Location

Exhaust Camshaft

HP Pump Gear

Octagon cam 

(for tooling)

Thrust journal

Connected to 

vacuum pump

Intake Camshaft

Cross flow type water jacket (improving cooling performance)

▶

02-27

0000-00

3) Valve Assembly (Installed in Cylinder Head)

(1) Features

Automatic valve clearance adjuster by hydraulic pressure (Maintenance Free) - Hydraulic lash

Optimized adjustment of valve clearance reduces the valve noise.

Roller type finger follower reduces the friction loss.

Vertical installation.

Simple and compact design reduces the moving operation (improving valve following and fuel 

consumption at high speed)

1.

2.

3.

4.

5.

(2) Arrangement

Hydraulic lash adjuster

Upper valve spring retainer

Lower valve spring retainer

Valve spring

Exhaust valve

Intake valve

Finger follower

02-28

Thickness marking

Ex: 1.3t

4) Cylinder Head Gasket

(1) Features

Sealing the cylinder gas pressure - Peak pressure: 190 bar

Minimizing the distortion of engine structure (cylinder head, block): profile stopper, backland 

stopper

Material: MLS (Multi Layer Steel), Gasket (3 layers)

Thickness of gasket: 3 types (1.2 /1.3 /1.4 mm)

1.

2.

3.

4.

(2) Thickness of cylinder head gasket

There are three types of gasket to managing the compression ratio.

Piston protrusion

▶

Piston protrusion

Thickness

0.475 to 0.540 mm

1.2t

0.541 to 0.649 mm

1.3t

0.650 to 0.745 mm

1.4t

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0000-00

(2) Layout

Chain upper bush

Type: single bush
Chains:112 EA

Tensioner rail

Installed between exhaust 
Camshaft sprocket and 
crankshaft sprocket

Hydraulic tensioner

Contains tensioner housing 
plug, spring and check valve, 
and operated by hydraulic 
pressure

Crankshaft sprocket

Teeth: 21 EA

Oil pump sprocket

Teeth: 33 EA

Chain lower bush

Chain type: single bush
Chains: 60 EA

Mechanical type tensioner

Operated by internal spring

Clamping rail

Installed between exhaust 
Camshaft sprocket and 
crankshaft sprocket

Exhaust camshaft 

sprocket

Teeth: 42 EA

1) Chain Drive

(1) Overview

The drive chain is single chain drive system with simple design and variable performance, and it utilizes 

the hydraulic tensioner to reduce the wave impact generated by the chain. This chain is light weight and 

has high durability through single bush chain. Shoulder bolts are used for better NVH.

7. CHAIN AND GEAR DRIVE SYSTEM

D20DTR engine uses single stage chain drive system. Timing chain drives the exhaust side and gear 

drive the intake side. Timing chain is single bush type. Upper chain drives HP pump connected to intake 

Camshaft by driving exhaust camshaft sprocket, and lower chain drives oil pump to lubricate the engine.

25±2.5Nm