SsangYong Actyon Sports II. Manual - part 16

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2) Timing Chain and Gear

(1) Timing chain

Simple layout: optimized timing, enhanced 

NVH

Single stage layout: minimized chain load

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Chain upper bush

 - Single bush type (112 EA)

Chain lower bush

 - Single bush type (60 EA)

(2) Tensioner

Tensioner adjusts the chain tension to keep it tight during engine running. This reduces the wear in 

guide rail and spoke.

Operating principle

- Use the spring tension in tensioner and hydraulic pressure

Tensioner type

- Compensation and impact absorbing

Static and dynamic force

- Spring + Hydraulic pressure

1.

2.

3.

Plunger

Housing

Spring

Check valve

Hydraulic tensioner assembly

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Clamping guide rail

Installed between exhaust 

Camshaft sprocket and 

crankshaft sprocket

Tensioner guide rail

Installed between exhaust 

Camshaft sprocket and 

crankshaft sprocket

(3) Mechanical Tensioner Assembly

Operating principle

- Use only spring tension

Tensioner type

- Compensation and impact absorbing

Static and dynamic force

- Spring 

(4) Guide rail

The guide rail is used for optimizing the movement of chain drive system. And it also prevents the chain 

from contacting each other when the chain is loose, and reduces the chain wear.

The guide rail is made of plastic, nylon, Teflon, etc. The guide rail is specially required when the distance 

between two spokes is too great. It pushes the chain with constant force so that the chain can work 

smoothly. The guide rail is fitted by pins.

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Screw plug

Oil seal

Timing gear case cover

(5) Timing gear case cover

Timing gear case cover (TGCC)

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Features

Major function: Protecting the chain drive system, minor function: Shielding the chain noise.

Install crankshaft front seal and screw plug on the timing gear case cover.

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Do not touch the inner lip of crankshaft front seal.

Be careful not to damage the screw thread when removing the lock pin to release the chain 

tensioner.

Be careful not to damage the O-ring when installing the screw plug.

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A671 997 01 46

Crankshaft front seal

Location of chain tensioner screw 

plug