SSANGYONG KORANDO 2012 Service Manual

02-251311-01
A. Timing chain
B. Oil pump chain
4) Timing Chain and Gear
Timing chain ▶
Simple layout provides the optimized timing.
Decreased chain vibration and noise
Single stage layout: minimized chain load -
-
- Teeth: 146 ea
Teeth: 58 ea

02-26
Clamping rail
Installed between intake
camshaft sprocket and
crankshaft sprocket
5) Chain Rails
The chain rails are used for optimizing the movement of chain drive system. And they also prevent the
chain from contacting each other when the chain is loose, and reduces the chain wear. The chain rail is
normally made of PA (Polyamide nylon), and PA66 and PA46 are used for the chain rails in G20DF
engine. For the tensioner rail, PA46 is used to provide high anti-wear function and high strength since
the load to the rail is huge. Ther is an open area for shoulder bolt hole in the clamping rail. The chain
rails are installed by shoulder bolts.
Tensioner rail
Installed between
exhaust camshaft
sprocket and crankshaft
sprocket

02-271130-13
1) Overview
Dual mass flywheel (DMF)
- Manual transaxleDrive plate
- Automatic transaxle
Dual mass flywheel reduces the unbalanced
rotation of crankshaft in manual transaxle
equipped vehicle. The flywheel is installed on the
crankshaft and is engaged to the clutch disc to
transfer the driving torque from the engine to the
powertrain system. Additionally, DMF decreases
the rattling noise in transaxle and the vehicle
vibration by reducing the differences of torque and
rotational speed due to the combustion in engine.The drive plate initially drives the powertrain
system by using the power from the start motor
when starting the engine. The drive plate is
installed on the crankshaft and is engaged to the
torque converter of automatic transaxle to transfer
the driving torque from the engine to the powertrain
system.

02-28
2) Operation of DMF
Compensating the irregular operation of engine: The secondary flywheel operates almost evenly so
does not cause gear noises
The mass of the primary flywheel is less than conventional flywheel so the engine irregularity
increases more (less pulsation absorbing effect).
Transaxle protection function: Reduces the torsional vibration to powertrain (transaxle) by reducing
the irregularity of engine. -
-
-
Compression stroke Combustion stroke
Small changes from engine (k):
Damper increases the torque changes to clutchLarge changes from engine (j):
Damper decreases the torque changes to
transaxle by absorbing the impact
Torque change curve of engine and drive shaft

02-291130-13
3) Features of DMF
Reduced vibration noise from the powertrain by blocking the torsional vibrations
Enhanced vehicle silence and riding comforts: reduced engine torque fluctuation
Reduced shifting shocks
Smooth acceleration and deceleration -
-
-
-
4) Advantages of DMF
Improved torque response by using 2-stage type spring: Strengthens the torque response in all
ranges (low, medium, and high speed) by applying respective spring constant at each
range.
Stable revolution of the primary and secondary wheel by using planetary gear: Works as auxiliary
damper against spring changes
Less heat generation due to no direct friction against spring surface: Plastic material is covered on the
spring outer surface
Increased durability by using plastic bushing (extends the lifetime of grease) -
-
-
-

02-30
Components
Piston assembly contains piston, #1 ring, #2 ring, oil ring, piston pin and snap ring. The expansion energy
from engine is transferred to the crankshaft through connecting rod to convert the linear movement to
rotating energy.Overview ▶
Layout and Components ▶
Top
Bottom
Oil ring
Piston ring
No.1 ring
Piston pin
No.2 ringSnap ring
Piston

02-311130-33
Functions ▶
Piston transfers the combustion energy from engine to connecting rod.
C. Snap ring
Locks the piston pin. - A. Piston ring
#1 ring (Top ring) : Prevents the high pressurized combustion gas from leaking into crank chamber,
and prevents the engine oil getting into combustion chamber.
#2 ring: Scrapes the engine oil on the cylinder bore, and prevents the leaked combustion gas from #1
ring from leaking into the crank chamber.
Oil ring: Scrapes the engine oil on the cylinder bore. -
-
-
B. Piston pin
Connects the piston the connecting rod, and transfers the linear movement of piston to connecting rod
to convert it to rotating energy. -
Piston ring ▶
Piston ring end gap (mm)
#1 end gap: 0.170 ~ 0.320
#2 end gap: 0.300 ~ 0.450Piston ring side clearance (mm)
#1 groove: 0.040 ~ 0.080
#2 groove: 0.040 ~ 0.080

02-32
Assembly mark
Top surface of piston Top surface of cylinder block
Assembling the piston ▶
Install the piston rings with the "X" mark on the ring facing upwards.
<00770096009a0090009b0090009600950047009b008f008c0047008c0095008b0047008e0088009700470096008d0047004a00580047009900900095008e00470088009b00470058005f0057020b00470088009e008800a00047008d009900960094004700
9b008f008c0047008c0095008b0047008e0088009700470096>f #2 ring.
<00770096009a0090009b0090009600950047009b008f008c0047008c0095008b0047008e0088009700470096008d00470096009000930047009900900095008e00470088009b00470058005f0057020b00470088009e008800a00047008d00990096009400
47009b008f008c0047008c0095008b0047008e008800970047>of coil spring, and position the
<008c0095008b0047008e0088009700470096008d00470096009000930047009900900095008e00470088009b004700600057020b00470088009e008800a00047008d0099009600940047009b008f008c0047008c0095008b0047008e008800970047009600
8d0047004a00590047009900900095008e0055> -
-
-
#1 cylinder

02-331130-25
Components
Overview ▶
Connecting rod converts the reciprocating movement of piston to the rotating movement of crankshaft.
The big end is connected to connecting rod bearing and the crank pin journal, and the small end is
connected to the piston pin.
Components ▶
Connecting rod
Piston pin bush
Connecting rod
Connecting rod upper bearing
Connecting rod lower bearing
Connecting rod cap
Connecting rod cap bolt A.
B.
C.
D.
E.
F.

02-34
Selection of connecting rod bearing ▶
Select the bearing shell combination according to the table below:
Conrod_UPR
GradeConrod_LWR
GradeClearance
Red Blue 0.005 ~ 0.050
Yellow Yellow 0.005 ~ 0.050
Blue Red 0.005 ~ 0.050