Hyundai i20 Quiz
Engine Mechanical System

Specifications

In this manual: Engine Mechanical System
General Information — 17Engine Mechanical System — 79Engine Electrical System — 50Emission Control System — 22Engine/Fuel Control System — 107Clutch System — 27MANUAL TRANSMISSION SYSTEM — 21Drive Shaft and Axle — 18Suspension System — 29Steering System — 21Restraint — 41Braking System — 53Body Work (Interior and Exterior) — 190Body Electrical System — 181Heating, Ventilation and Air Conditioning — 58
~8min read

Specifications

Description Specification Limit
General
Good In-line, DOHC
Number of cylinders 3
Bore 71.0 mm (2.7952 in)
Stroke 84.0 mm (3.3070 in)
Total Displacement 998 cc (60.9 cu in)
Compression ratio 10,0:1
Firing order 1 - 2 - 3
Valve Timing
Intake Valve Opening BTDC 40° ~ BTDC 10°
Closing ABCD 20,7° ~ ABCD 70,7°
Exhaust Valve Opening BBDC 61,27° ~ BBDC 21,27°
Closing ATDC 10° ~ ABDC 50°
CYLINDER HEAD COVER
Gasket Surface Flatness Less than 0.05 mm (0.0020 in)
Less than 0.02 mm (0.0008 in)/100 x 100
Flatness tolerance LIMIT Less than 0.1 mm (0.0039 in)
Mounting surface exhaust Less than 0.1 mm (0.0039 in)
Camshaft
CAM LOBE HEIGHT LIMIT 41.79824 mm (1.6456 in)
exhaust 41.57000 mm (1.6366 in)
Crankpin Outer Diameter Intake/Exhaust No. 1 36.464 ~ 36.478 mm (1.4355 ~ 1.4361 in)
Intake/Exhaust No. 2 ~ 5 20.964 ~ 20.978 mm (0.8254 ~ 0.8259 in)
Valve
Valve length LIMIT 92.85 mm (3.6555 in)
exhaust 93.37 mm (3.6759 in)
Stem outer diameter LIMIT 5.465~5.480 mm (0.2151~0.2157 in)
exhaust 5.448~5.460 mm (0.2144~0.2149 in)
Valve head thickness LIMIT 1.50 mm (0.0590 in)
(Limit) exhaust 1.75 mm (0.0688 in)
Valve stem-to-guide clearance LIMIT 0.020 ~ 0.047 mm (0.00078 ~ 0.00185 in)
exhaust 0.040 ~ 0.064 mm (0.00157 ~ 0.00251 in.)
MLA Outer Diameter 27.964 ~ 27.980 mm (1.1010 ~ 1.1016 in.)
Tappet Bore Inside Diameter 28.000 ~ 28.025 mm (1.1024 ~ 1.1033 in.)
Clearance between MLA and Tappet Bore 0.020 ~ 0.061 mm (0.0008 ~ 0.0024 in.)
Valve Spring
Free Length 47.9 mm (1.8858 in.)
Charge 14.47 - 16.12 kgf/34.2 mm
(141.9–158.1 N / 1.3465 in.)
25.55 - 27.47 kgf/25.7 mm
(250.6–269.4 N / 1.0118 in.)
Misalignment MAX. 1.5°
Cylinder block
Cylinder Bore Diameter 71.00–71.03 mm (2.7952–2.7964 in.)
Gasket Surface Flatness Less than 0.05 mm (0.0020 in)
Less than 0.02 mm (0.0008 in)/100 x 100
PISTON
Piston Outer Diameter 70.965 ~ 70.995 mm (2.7939 ~ 2.7951 in.)
Piston-to-Cylinder Clearance 0.025 ~ 0.045 mm (0.0010 ~ 0.0018 in.)
To Ring Groove Width No. 1 Ring Groove 1.235 ~ 1.250 mm (0.0486 ~ 0.0492 in.)
No. 2 Ring Groove 1.23 ~ 1.25 mm (0.0484 ~ 0.0492 in.)
Oil Ring Groove 2.010 ~ 2.025 mm (0.0791 ~ 0.0797 in.)
Piston Ring
Side Clearance No. 1 Ring 0.05 ~ 0.08 mm (0.0020 ~ 0.0031 in.)
No. 2 Ring 0.04 ~ 0.08 mm (0.0015 ~ 0.0031 in.)
Oil Ring 0.050 ~ 0.125 mm (0.0020 ~ 0.0049 in.)
End Gap No. 1 Ring 0.13 ~ 0.23 mm (0.0051 ~ 0.0091 in.)
No. 2 Ring 0.25 ~ 0.40 mm (0.0098 ~ 0.0157 in.)
Oil Ring 0.2 ~ 0.7 mm (0.0079 ~ 0.0276 in.)
Piston Pin
Piston Pin Outer Diameter 17.997 ~ 18.000 mm (0.7085 ~ 0.7086 in.)
Piston Pin Bore Clearance 0.005 ~ 0.012 mm (0.0002 ~ 0.0005 in.)
Connecting Rod Small End Bore Clearance 0.005 ~ 0.014 mm (0.0002 ~ 0.0006 in.)
CONNECTING ROD
Connecting Rod Large End Inside Diameter 42.000 ~ 42.018 mm (1.6535 ~ 1.6542 in.)
Connecting Rod Bearing Oil Clearance 0.018 ~ 0.036 mm (0.0007 ~ 0.0014 in.)
Side Clearance 0.10 ~ 0.25 mm (0.0039 ~ 0.0098 in.)
Crankshaft
Main Journal Outside Diameter 47.942 ~ 47.960 mm (1.8874 ~ 1.8882 in.)
Journal Bearing Outside Diameter 38.954 ~ 38.972 mm (1.5336 ~ 1.5343 in.)
Main Bearing Oil Clearance 0.006 ~ 0.024 mm (0.0002 ~ 0.0009 in.)
Thrust Clearance 0.07 ~ 0.25 mm (0.0028 ~ 0.0098 in.)
2-Step Variable Oil Pump (Rotor Type)
Side Clearance Inner Rotor 0.040 ~ 0.090 mm (0.0016 ~ 0.0035 in.)
Outer Rotor 0.040 ~ 0.090 mm (0.0016 ~ 0.0035 in.)
Relief Valve Opening Pressure LOW 211 ~ 279 kPa
(2.15 ~ 2.85 kgf/cm², 30.6 ~ 40.5 psi)
HIGH 441 ~ 539 kPa
(4.5 ~ 5.5 kgf/cm², 64.0 ~ 78.2 psi)
Engine Oil
Oil Quantity: General 3.9 L/ When replacing a short engine or block
DRAIN OIL 3.3 L
Drain and Refill 3.6 L including oil filter
Oil Grade Specifications 0W-30 / API SN or ACEA C2
Oil Pressure (at 1000 rpm) 130 kPa (1.3 kgf/cm², 18.85 psi) Oil Pan Oil Temperature: 110 ± 2 °C
Cooling Method
Cooling Method Forced circulation with water pump
Coolant Capacity About 6.4 L
(1.68 US gal., 6.76 US qt., 5.63 Imp. qt.)
Thermostat Good Wax Pellet Type
Opening temperature 86,5 ~ 90 °C
Temperature / Valve Lift at Fully Open More than 8 mm (0.3 in.) / 100 °C
Separate Engine Coolant
Thermostat		 Good Wax Pellet Type
Opening temperature 105 ± 1,5 °C
Full Open Temperature More than 8 mm (0.3 in.) / 120 °C
Fuel Tank Cap Main Valve Opening Pressure 93.2 ~ 122.6 kPa
(0.95 ~ 1.25 kgf/cm², 13.51 ~ 17.78 psi)
Vacuum Valve Opening Pressure 6.86 kPa
(0.07 kgf/cm², 0.99 psi)

Tightening Torque
Item N·m kgf·m lbf·ft
Engine Mounting
Bolt - Engine Mounting Bracket to Body 49,0~63,7 5,0~6,5 36,2~47,0
Nut - Engine Mounting Insulator to Engine Mounting Bracket 88,3~107,9 9,0~11,0 65,1~79,6
Bolt - Engine Mounting Bracket to Engine Bracket 58,8~73,5 6,0~7,5 43,4~54,2
Nut - Engine Mounting Bracket to Engine Support 58,8~73,5 6,0~7,5 43,4~54,2
Bolt - Transmission Mounting Bracket to Body 49,0~63,7 5,0~6,5 36,2~47,0
Bolt - Transmission Mounting Insulator to Transmission Mounting Bracket 88,3~107,9 9,0~11,0 65,1~79,6
Front Roll Rod Bracket-to-Subframe Bolt 49,0~63,7 5,0~6,5 36,2~47,0
Roll Rod Bracket-to-Roll Rod Support Bracket Bolt 107,9~127,5 11,0~13,0 79,6~94,0
Cylinder block
Ladder Frame Bolt 19,6~23,5 2,0~2,4 14,5~17,4
Oil Jet 8,8~12,7 0,9~1,3 6,5~9,4
Connecting Rod Bearing Cap Bolt [10,8 ~ 14,7] + [88 ~ 92°] [1,1 ~ 1,5] + [88 ~ 92°] [8,0 ~ 10,8] + [88 ~ 92°]
Main Bearing Cap Bolt [17,7 ~ 21,6] + [103 ~ 105°] [1,8 ~ 2,2] + [103 ~ 105°] [13,0 ~ 15,9] + [103 ~ 105°]
Flywheel Bolt (M/T) 73,5~83,4 7,5~8,5 54,2~61,5
Drive Belt System
Time-Lapse Photography 53,9~63,7 5,5~6,5 39,8~47,0
Crankshaft Damper Pulley Bolt [55,9 - 61,8] + [47 - 50°] [5,7–6,3] + [47–50°] [41,2 - 45,6] + [47 - 50°]
Drive Belt Tensioner 42,2 - 53,9 4,3 - 5,5 31,1 - 39,8
Timing System
Timing Chain Cover Bolt (M8x25) 18,6~23,5 1,9~2,4 13,7~17,4
Timing Chain Cover Bolt (M10x56) 44,1~53,9 4,5~5,5 32,5~39,8
Timing Chain Cover Bolt (M6x38) 9,8 - 11,8 1,0 - 1,2 7,2 - 8,7
Timing Chain Tensioner Bolt 9,8 - 11,8 1,0 - 1,2 7,2 - 8,7
Timing Chain Tensioner Arm Bolt 9,8 - 11,8 1,0 - 1,2 7,2 - 8,7
Timing Chain Guide Bolts 18,6~21,6 1,9~2,2 13,7~15,9
CYLINDER HEAD COVER
Cylinder Head Cover Bolt [3,9~5,9]+[7,8~9,8] [0,4~0,6]+[0,8~1,0] [2,9~4,3]+[5,8~7,2]
CVVT Intake Bolt 63,7~73,5 6,5~7,5 6,5~7,5
CVVT Exhaust Bolt 63,7~73,5 6,5~7,5 6,5~7,5
Camshaft Bearing Cap Bolt (M6) [5,9]~[11,8~13,7] [0,6]~[1,2~1,4] [4.3]~[8.7~10.1]
Front Camshaft Bearing Cap Bolt (M8) [9,8]+[18,6~22,6] [1,0] + [1,9 ~ 2,3] [7,2]+[13,7~16,6]
Rear Camshaft Bearing Cap 11,8~13,7 1,2~1,4 8,7~10,1
Cylinder Head Bolt [12,7~16,7] + [90~95°] + [120~125°] [1,3~1,7] + [90~95°] + [120~125°] [9,4~12,3] + [90~95°] + [120~125°]
OCV Bolt 9,8 - 11,8 1,0 - 1,2 7,2 - 8,7
COOLING SYSTEM
Water Pump Pulley Bolt 9,8 - 11,8 1,0 - 1,2 7,2 - 8,7
Water Pump Bolts 19,6 - 26,5 2,0 - 2,7 14,5 - 19,5
Heater Pipe Nut and Bolt 19,6 - 26,5 2,0 - 2,7 14,5 - 19,5
Thermostat Housing Nut and Bolt 18,6~23,5 1,9~2,4 13,7~17,4
Water Inlet Fitting Nut and Bolt 18,6~23,5 1,9~2,4 13,7~17,4
Lubrication System
OIL COOLER 44,1~53,9 4,5~5,5 32,5~39,8
Oil Pump Cover Screw 5,9~8,8 0,6~0,9 4,3~6,5
Oil Level Gauge Guide Bolt 8,8~13,7 0,9~1,4 6,5~10,1
Oil Pan Bolt 9,8 - 11,8 1,0 - 1,2 7,2 - 8,7
Oil Pan Drain Plug 34,3~44,1 3,5~4,5 25,2~32,4
Oil Filter Bolt 9,8 - 11,8 1,0 - 1,2 7,2 - 8,7
Oil pressure sensor 7,8 - 11,8 0,8 - 1,2 5,8 - 8,7
Intake and Exhaust System
Intake Manifold Nut and Bolt 18,6~23,5 1,9~2,4 13,7~17,4
Intake Manifold Mounting Bolt 18,6~23,5 1,9~2,4 13,7~17,4
Electronic Throttle Control (ETC) Module Bolt 9,8 - 11,8 1,0 - 1,2 7,2 - 8,7
Turbocharger Manifold Module Nut 35,3 - 41,2 3,6~4,2 26,0 - 30,4
Heater Clutch Shield Bolt 9,8 - 11,8 1,0 - 1,2 7,2 - 8,7
Heater Catalytic Converter Upper Mounting Bolt (ICC) 18,6~23,5 1,9~2,4 13,7~17,4
Exhaust Manifold Bracket Bolt 39,2~44,1 4,0~4,5 28,9~32,5
Water Pipe Banjo Bolt 26,4~32,3 2,7~3,3 19,5~32,3
Downpipe Banjo Bolt 26,4~32,3 2,7~3,3 19,5~32,3
Oil Drain Tube Bolt 9,8 - 11,8 1,0 - 1,2 7,2 - 8,7
Oil Supply Tube Banjo Bolt 11,8~17,7 1,2~1,8 8,7~13,0
Heat Exchanger Upper Bracket Mounting Bolt 9,8 - 11,8 1,0 - 1,2 7,2 - 8,7
Muffler Nut 39,2~58,8 4,0~6,0 28,9~43,4

Test yourself

A quick Hyundai i20 quiz: every answer comes with an explanation and a link to the manual page.