SsangYong Rodius (2013 year). Manual — part 47

02-28

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

02-29

0000-00

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

Thickness marking

Ex: 1.3t

02-30

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 NHV.

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 cam shift sprocke, and lower chain drives oil pump to lubricate the

engine.

02-31

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

The brass links on timing chain are aligned with the timing marks on crankshaft sprocket and

camshaft sprocket by eight turns of crankshaft.