Hyundai Ioniq: Engine Mechanical System / Specifications

Hyundai Ioniq (AE) 2017-2024 Service Manual / Engine Mechanical System / Specifications

Specifications
Description
Specification
Limit
General
Type
In-line, DOHC
　
Number of cylinders
4
　
Bore
72.0 mm (2.8346 in)
　
Stroke
97.0 mm (3.8189 in)
　
Total displacement
1,580 cc (96.42 cu.in)
　
Compression ratio
13.0 : 1
　
Firing order
1 - 3 - 4 - 2
　
Valve timing
Intake valve
Opens
ATDC 10° - BTDC 60°
　
Intake valve
Closes
ABDC 108.8° - ABDC 38.8°
　
Exhaust valve
Opens
BBDC 50.2° - BBDC 10.2°
　
Exhaust valve
Closes
ATDC 3° - ATDC 43°
　
Cylinder head
Flatness of gasket surface
Less than 0.05 mm (0.0025 in)
Less than 0.02 mm (0.0008 in) / 100 x 100
　
Flatness of manifold
Intake
Less than 0.1 mm (0.0039 in)
　
mounting surface
Exhaust
Less than 0.1 mm (0.0039 in)
　
Camshaft
Camheight
Intake
36.42 mm (1.4339 in)
　
Exhaust
36.15 mm (1.4232 in)
　
Journal outer diameter
Intake
NO.1
36.459 - 36.473 mm (1.43539 - 1.43594 in.)
　
NO2,3,4,5
22.964 - 22.978 mm (0.90409 - 0.90464 in.)

Exhaust
NO.1
36.464 - 36.478 mm (1.43559 - 1.43614 in.)
　
NO2,3,4,5
22.964 - 22.978 mm (0.90409 - 0.90464 in.)

End play
0.1 - 0.2 mm (0.0039 - 0.0079 in.)

Valve
Valve length
Intake
100.94 mm (3.9740 in)
　
Exhaust
101.09 mm (3.9799 in)
　
Stem outer diameter
Intake
5.465 - 5.480 mm (0.2151 - 0.2157 in)
　
Exhaust
5.448 - 5.470 mm (0.2144 - 0.2154 in)
　
Face angle
45.25° - 45.75°

Thickness of valve head (margin)
Intake
1.35 - 1.65 mm (0.0531 - 0.0650 in.)
　
Exhaust
1.60 - 1.90 mm (0.0630 - 0.0748 in.)
　
Valve stem to valve guide clearance
Intake
0.020 - 0.047 mm (0.00078 - 0.00185 in)
　
Exhaust
0.030 - 0.064 mm (0.00118 - 0.00251 in)
　
Valve guide
Length
Intake
45.8 - 46.2 mm (1.8031 - 1.8189 in.)

Exhaust
45.8 - 46.2 mm (1.8031 - 1.8189 in.)

Valve spring
Free length
50.27 mm (1.9791 in)
　
Load
16.4 ± 0.8 kg / 35.5 mm (161 ± 8 N / 1.3976 in)
　
26.0 ± 0.9 kg / 27.7mm (255 ± 9 N / 1.0905 in)
　
Out of squareness
1.5° MAX
　
Cylinder block
Cylinder bore
72.00 - 72.03 mm (2.8346 - 2.8358 in)
　
Flatness of gasket surface
Less than 0.05 mm (0.0020 in)
Less than 0.02 mm (0.0008 in) / 100 x 100
　
Piston
Piston outer diameter
71.965 - 71.995 mm (2.8333 - 2.8344 in)
　
Piston to cylinder clearance
0.02 - 0.04 mm (0.0008 - 0.0016 in)
　
Ring groove width
No. 1 ring groove
1.035 - 1.05 mm (0.0407 - 0.0413 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
0.30 - 0.40 mm (0.0118 - 0.0157 in)
　
Oil ring
0.20 - 0.70 mm (0.0079 - 0.0276 in)
　
Piston pin
Piston pin outer diameter
17.997 - 18.000 mm (0.7085 - 0.7087 in.)
　
Piston pin hole inner diameter
18.005 - 18.009 mm (0.7089 - 0.7090 in.)
　
Piston pin hole clearance
0.005 - 0.014 mm (0.00019 - 0.00055 in)
　
Connecting rod small end hole inner diameter
18.005 - 18.011 mm (0.7089 - 0.7091 in.)
　
Connecting rod small end hole clearance
0.005 - 0.014 mm (0.0002 - 0.0006 in.)
　
Connecting rod
Connecting rod big end inner 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
0.1 - 0.25 mm (0.0039 - 0.0098 in)
　
Crankshaft
Main journal outer diameter
47.942 - 47.960 mm (1.8875 - 1.8882 in)
　
Pin journal outer 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)
　
End play
0.07 - 0.25 mm (0.0028 - 0.0098 in)
　
Oil pump
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 spring
Opening pressure
1st : 210.84 - 279.49 kPa
(2.15 - 2.85 kgf/cm², 30.58 - 40.54 psi)
2nd : 441.30 - 539.36 kPa
(4.5 - 5.5 kgf/cm², 64.00 - 78.23 psi)
　
Engine oil
Oil quantity
Total
4.1 L (1.08 U.S.gal., 4.33 U.S.qt., 3.60 lmp.qt.)
When replacing a short engine or a block assembly
Oil pan
3.4 L (0.89 U.S.gal., 3.59 U.S.qt., 2.99 lmp.qt.)
　
Drain and refill
3.8 L (1.00 U.S.gal., 4.01 U.S.qt., 3.34 lmp.qt.)
Including oil filter
Oil grade
Specifications
5W-30 / ACEA A5 / B5
   
•
API SL, ILSAC GF-3, ACEA A3 Class engine oil can be used if the recommended engine oil is not available.
•
Refer to the "Lubrication System" for recommended SAE viscosity number.

Oil pressure (at 1000rpm)
1.0 bar or above
Oil temperature in oil pan : 110±2°C (230 ± 3.6°F)
Cooling method
Cooling system
Forced circulation with water pump
　
Coolant quantity
6.7 L (1.76 U.S.gal., 7.07 U.S.qt., 5.89 lmp.qt.)
　
Main thermostat
Type
Wax pellet type
　
Opening
temperature
88 ± 1.5 °C (190.4 ± 2.7°F)
　
Full opening
temperature
100°C (212°F) / 8mm (0.3150 in.) more than
　
Separate cooling thermostat
Type
Wax pellet type

Opening temperature
105 ± 1.5°C (221 ± 2.7 °F)

Full opening temperature
120°C (248.0 °F) / 8 mm (0.3150 in.) More than

Radiator cap
Main valve opening pressure
93.16 - 122.58 kpa
(0.95 - 1.25 kg/cm², 13.51 - 17.78 psi)
　
Vacuum valve opening pressure
Max 6.8 kPa
(Max 0.07 kg/cm², 0.99 psi)
　
Water temperature sensor
Type
Thermistor type
　
Resistance
20°C (68°F)
2.45 ± 0.14 kΩ
　
80°C (176°F)
0.3222 kΩ
　

Tightening Torques
Item
N.m
kgf.m
lb-ft
Engine mounting
Engine mounting bracket and body fixing blot
49.0 - 63.7
5.0 - 6.5
36.1 - 47.0
Engine mounting insulator to engine mounting support bracket fixing nut
88.3 - 107.9
9.0 - 11.0
65.1 - 79.6
Engine mounting support bracket and engine support bracket fixing bolt
58.8 - 73.5
6.0 - 7.5
43.4 - 54.2
Engine mounting support bracket and engine support bracket fixing nut
58.8 - 73.5
6.0 - 7.5
43.4 - 54.2
Transaxle mounting bracket and body fixing bolt
49.0 - 63.7
5.0 - 6.5
36.1 - 47.0
Transaxle mounting insulator and transaxle support bracket fixing bolt
88.3 - 107.9
9.0 - 11.0
47.0 - 61.5
Roll rod bracket and sub frame fixing bolt
49.0 - 63.7
5.0 - 6.5
36.1 - 47.0
Roll rod bracket to roll rod support bracket fixing bolt
107.9 - 12.75
11.0 - 13.0
79.6 - 94.0
Timing system
Hydraulic tensioner
27.5 - 31.4
2.8 - 3.2
20.3 - 23.1
Mechanical tensioner
18.6 - 23.5
1.9 - 2.4
13.7 - 17.4
Timing chain cover bolt
18.6 - 23.5
1.9 - 2.4
13.7 - 17.4
Idler
39.2 - 49.0
4.0 - 5.0
28.9 - 36.2
Timing chain tensioner arm bolt
9.8 - 11.8
1.0 - 1.2
7.2 - 8.7
Timing chain guide bolt
9.8 - 11.8
1.0 - 1.2
7.2 - 8.7
Crankshaft damper pulley bolt
[65.7 - 71.6 ] + [39°- 41°]
[6.7 - 7.3] + [39 - 41°]
[48.5 - 52.8] + [39° - 41°]
Timing chain tensioner bolt
9.8 - 11.8
1.0 - 1.2
7.2 - 8.7
Cylinder head
High pressure fuel pipe nut
26.5 - 32.4
2.7 - 3.3
19.5 - 23.9
High pressure fuel pump mounting bolt
12.7 - 14.7
1.3 - 1.5
9.4 - 10.8
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]
Oil control solenoid (OCS) bolt
9.8 - 11.8
1.0 - 1.2
7.2 - 8.7
Intake OCV & center bolt
[47.1 - 52.0 ] + [25°- 31°]
[4.8 - 5.3] + [25 - 31°]
[34.7 - 38.3] + [25° - 31°]
Exhaust CVVT sprocket bolt
63.7 - 73.5
6.5 - 7.5
47.0 - 54.2
Camshaft bearing cap bolt (M6)
11.8 - 12.7
1.2 - 1.3
8.7 - 9.4
Camshaft bearing cap bolt (M8)
18.6 - 22.6
1.9 - 2.3
13.7 - 16.6
Cylinder head bolt (P/N : 22320-03000)
[14.7] + [90°] + [120°]
[1.5] + [90°] + [120°]
[10.8] + [90°] + [120°]
Cylinder head bolt (P/N : 22320-03HA0)
[14.7] + [120°] + [120°]
[1.5] + [120°] + [120°]
[10.8] + [120°] + [120°]
Cylinder block
Engine support bracket bolt
39.2 - 44.1
4.0 - 4.5
28.9 - 32.5
Ladder frame bolt
18.6 - 23.5
1.9 - 2.4
13.7 - 17.4
Connecting rod cap bolt
[10.8 - 14.7] + [88 - 92°]
[1.1 - 1.5] + [88 - 92°]
[8.0 - 10.8] + [88 - 92°]
Crankshaft main bearing cap bolt
[17.7 - 21.6] + [88 - 92°]
[1.8 - 2.2] + [88 - 92°]
[13.0 - 15.9] + [88 - 92°]
Fly wheel bolt (DCT)
78.5 - 88.3
8.0 - 9.0
57.9 - 65.1
Lubrication system
Oil filter
11.8 - 15.7
1.2 - 1.6
8.7 - 11.6
Oil pan bolt
9.8 - 11.8
1.0 - 1.2
7.2 - 8.7
Oil drain plug
34.3 - 44.1
3.5 - 4.5
25.2 - 32.4
Oil screen nut
24.5 - 31.4
2.5 - 3.2
18.1 - 23.1
Oil pressure switch
9.8 - 11.8
1.0 - 1.2
7.2 - 8.7
Oil level gauge pipe mounting 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 bolt
18.6 - 23.5
1.9 - 2.4
13.7 - 17.4
Water pump nut
18.6 - 23.5
1.9 - 2.4
13.7 - 17.4
Water temperature control assembly bolt
18.6 - 23.5
1.9 - 2.4
13.7 - 17.4
Water inlet fitting nut
18.6 - 23.5
1.9 - 2.4
13.7 - 17.4
Pipe bolt
18.6 - 23.5
1.9 - 2.4
13.7 - 17.4
Intake and exhaust system
Air intake hose clamp bolt
2.9 - 4.9
0.3 - 0.5
2.2 - 3.6
Air cleaner assembly mounting bolt
3.9 - 5.9
0.4 - 0.6
2.9 - 4.3
Electronic throttle control (ETC) module bolt
9.8 - 11.8
1.0 - 1.2
7.2 - 8.7
Intake manifold nut
18.6 - 23.5
1.9 - 2.4
13.7 - 17.4
Intake manifold bolt
18.6 - 23.5
1.9 - 2.4
13.7 - 17.4
Exhaust manifold heat protector bolt
9.8 - 11.8
1.0 - 1.2
7.2 - 8.7
Exhaust manifold stay bolt
39.2 - 49.0
4.0 - 5.0
28.9 - 36.2
Exhaust manifold nut
34.3 - 39.2
3.5 - 4.0
25.3 - 28.9
Oxygen sensor (front/rear)
39.2 - 49.0
4.0 - 5.0
28.9 - 36.2
Catalytic converter / muffler nut
39.2 - 58.8
4.0 - 6.0
28.9 - 43.4
EGR cooler bolt
18.6 - 23.5
1.9 - 2.4
13.7 - 17.4
EGR cooler pipe bolt
18.6 - 23.5
1.9 - 2.4
13.7 - 17.4
EGR cooler pipe nut
29.4 - 34.3
3.0 - 3.5
21.7 - 25.3

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