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Engine Mechanical System - General Information - 2.0L: Specifications Kia Optima III

Specifications

DescriptionSpecificationsLimit
General
TypeIn-line, DOHC
Number of cylinders4
Bore86 mm (3.385 in.)
Stroke86 mm (3.385 in.)
Total displacement1998 cc (121.92 cu. in)
Compression ratio9.5 ± 0.3 : 1
Firing order1-3-4-2
Valve timing
Intake valveOpensATDC 7° ~ BTDC 38°
ClosesABDC 67° ~ ABDC22°
Exhaust valveOpensBBDC 54° ~ BBDC 9°
ClosesBTDC 10° ~ ATDC35°
Valve clearance (Engine coolant temperature : 20°C (68°F))
Intake valve0.17 ~ 0.23 mm (0.0067 ~ 0.0090 in.)0.10 ~ 0.30 mm (0.0039 ~ 0.0118 in.)
Exhaust valve0.32 ~ 0.38 mm (0.0126 ~ 0.0150 in.)0.20 ~ 0.40 mm (0.0079 ~ 0.0157 in.)
Camshaft
Cam heightIntake44.2 mm (1.7401 in.)
Exhaust45.0 mm (1.7716 in.)
Journal outer diameterIntakeNo. 1 : Ø 30 mm (1.1811 in.) No. 2, 3, 4, 5 : Ø 24 mm (0.9449 in.)
ExhaustNo. 1 : Ø 36 mm (1.4173 in.) No. 2, 3, 4, 5 : Ø 24 mm (0.9449 in.)
Bearing oil clearanceIntakeNo. 1 : 0.022 ~ 0.057 mm (0.00087 ~ 0.00224 in.) No. 2, 3, 4, 5 : 0.030~0.067 mm (0.00118 ~ 0.00264 in.)No. 1 : 0.090 mm (0.00354 in.) No. 2, 3, 4, 5 : 0.120 mm (0.00472 in.)
ExhaustNo. 1 : 0 ~ 0.032 mm (0 ~ 0.00126 in.) No. 2, 3, 4, 5 : 0.030~0.067 mm (0.00118 ~ 0.00264 in.)
End play0.04 ~ 0.16 mm (0.0016 ~ 0.0063 in.)0.20 mm (0.0078 in.)
Valve
Valve lengthIntake113.18 mm (4.4559 in.)112.93 mm (4.4461 in)
Exhaust105.79 mm (4.1650 in.)105.59 mm (4.1571 in)
Stem outer diameterIntake5.465 ~ 5.480 mm (0.21516 ~ 0.21575 in.)
Exhaust5.458 ~ 5.470 mm (0.21488 ~ 0.21535 in.)
Face angle45.25° ~ 45.75°
Thickness of valve head (margin)Intake1.02 mm (0.0401 in.)
Exhaust1.09 mm (0.0429 in.)
Valve stem to valve guide clearanceIntake0.020 ~ 0.047 mm (0.00078 ~ 0.00185 in.)0.070 mm (0.00275 in.)
Exhaust0.030 ~ 0.054 mm (0.00118 ~ 0.00212 in.)0.090 mm (0.00354 in.)
MLA outer diameter31.964 ~ 31.980 mm (1.2584 ~ 1.2590 in.)
Tappet bore inner diameter32.000 ~ 32.025 mm (1.2598 ~ 1.2608 in.)
MLA to tappet bore clearance0.020 ~ 0.061 mm (0.00078 ~ 0.00240 in.)0.070 mm (0.00275 in.)
Valve guide
LengthIntake43.8 ~ 44.2 mm (1.7244 ~ 1.7401 in.)
Exhaust43.8 ~ 44.2 mm (1.7244 ~ 1.7401 in.)
Inner diameterIntake5.500 ~ 5.512 mm (0.21654 ~ 0.21701 in.)
Exhaust5.500 ~ 5.512 mm (0.21654 ~ 0.21701 in.)
Valve seat
Width of seat contactIntake1.16 ~ 1.46 mm (0.0457 ~ 0.0575 in.)
Exhaust1.35 ~ 1.65 mm (0.0531 ~ 0.0649 in.)
Seat angleIntake44.75° ~ 45.10°
Exhaust44.75° ~ 45.10°
Valve spring
Free length47.44 mm (1.8677 in.)
Load19.0 ± 0.6kg/35.0 mm (41.88 ± 1.32lb/1.3779 in 39.8 ± 1.2kg/26.0 mm (87.74 ± 2.64lb/1.0236 in.)
Out of squarenessLess than 1.5°
Cylinder head
Flatness of gasket surfaceLess than 0.05 mm (0.0019 in.) for total area Less than 0.02 mm (0.0007 in.) for a section of 100 mm (3.9370 in.) x 100 mm (3.9370 in.)
Flatness of manifold mounting surfaceIntakeLess than 0.10 mm (0.0039 in.)
ExhaustLess than 0.10 mm (0.0039 in.)
Piston
Piston outer diameter85.970 ~ 86.000 mm (3.3846 ~ 3.3858 in)
Piston to cylinder clearance0.020 ~ 0.040 mm (0.00079 ~ 0.00157 in.)
Ring groove widthNo. 1 ring1.235 ~ 1.250 mm (0.04862 ~ 0.04921 in.)1.260 mm (0.04961 in.)
No. 2 ring1.530 ~ 1.550 mm (0.06023 ~ 0.06102 in)1.560 mm (0.06141 in)
Oil ring2.010 ~ 2.025 mm (0.07913 ~ 0.07972 in.)2.050 mm (0.08071 in.)
Piston ring
Side clearanceNo. 1 ring0.050 ~ 0.080 mm (0.00197 ~ 0.00315 in.)0.100 mm (0.00394 in.)
No. 2 ring0.040 ~ 0.080 mm (0.00157 ~ 0.00315 in.)0.100 mm (0.00394 in.)
Oil ring0.020 ~ 0.055 mm (0.00079 ~ 0.00217 in.)0.100 mm (0.00394 in.)
End gapNo. 1 ring0.15 ~ 0.30 mm (0.0059 ~ 0.0118 in.)0.60 mm (0.0236 in.)
No. 2 ring0.30 ~ 0.45 mm (0.0118 ~ 0.0177 in)0.70 mm (0.0275 in.)
Oil ring0.20 ~ 0.50 mm (0.0079 ~ 0.0197 in.)0.80 mm (0.0315 in.)
Piston pin
Piston pin outer diameter21.997 ~ 22.000 mm (0.86602 ~ 0.86614 in.)
Piston pin hole inner diameter22.003 ~ 22.007 mm (0.86626 ~ 0.86642 in.)
Piston pin hole clearance0.003 ~ 0.010 mm (0.00012 ~ 0.00039 in.)
Connecting rod small end hole inner diameter22.005 ~ 22.011 mm (0.86634 ~ 0.86657 in.)
Piston pin-to-connecting rod interference0.005 ~ 0.014 mm (0.00020 ~ 0.00055 in.)
Connecting rod
Connecting rod big end inner diameter51.000 ~ 51.018 mm (2.00787 ~ 2.00858 in.)
Connecting rod bearing oil clearance0.031 ~ 0.045 mm (0.00122 ~ 0.00177 in.)0.050 mm (0.00197 in.)
Side clearance0.10 ~ 0.25 mm (0.0039 ~ 0.0098 in.)0.35 mm (0.0138 in.)
Crankshaft
Main journal outer diameter51.942 ~ 51.960 mm (2.04496 ~ 2.04567 in.)
Pin journal outer diameter47.954 ~ 47.972 mm (1.88795 ~ 1.88866 in.)
Main bearing oil clearance0.020 ~ 0.038 mm (0.00079 ~ 0.00150 in.)0.100 mm (0.00394 in.)
End play0.07 ~ 0.25 mm (0.0028 ~ 0.0098 in.)0.30 mm (0.0118 in.)
Cylinder block
Cylinder bore86.00 ~ 86.03 mm (3.3858 ~ 3.3870 in.)
Flatness of gasket surfaceLess than 0.05 mm (0.0019 in.) for total area Less than 0.02 mm (0.0007 in.) for a section of 100 mm (3.9370 in.) x 100 mm (3.9370 in.)
Engine oil
Oil quantityTotal5.5 L (1.45 U.S.gal., 5.81 U.S.qt., 4.84 lmp.qt.)When replacing a short engine or block assembly
Oil pan4.2 L (1.11 U.S.gal., 4.44 U.S.qt., 3.70 lmp.qt.)
Drain and refill4.6 L (1.22 U.S.gal., 4.86 U.S.qt., 4.05 lmp.qt.)Including oil filter
Oil gradeRecommendation5W-30 ACEA A5If not available, refer to LUBRICATION SYSTEM .
ClassificationAPI SL, SM or above ILSAC GF3, GF4 or above ACEA A3 or A5Satisfy the requirement of the API or ILSAC or ACEA classification
SAE viscosity gradeRecommended SAE viscosity numberRefer to LUBRICATION SYSTEM .
Oil pressure (at 1, 000 RPM)117.68 kPa (1.2kgf/cm 2 , 17.07 psi) or aboveOil temperature (oil pan): 110±2°C (230±35.6°F)
Cooling system
Cooling methodForced circulation with cooling fan
Coolant quantity6.5 ~ 6.6L (1.72 ~ 1.74 U.S.gal., 6.87 ~ 6.97 U.S.qt., 5.72 ~ 5.81 lmp.qt.)
ThermostatTypeWax pellet type
Opening temperature82±1.5°C (179.6±2.7°F)
Full opening valve lift/temperatureMore than 8 mm (0.3 in.) / 95°C (203°F)
Radiator capMain valve opening pressure93.16 ~ 122.58 kPa (0.95 ~ 1.25kgf/cm 2 , 13.51 ~ 17.78 psi)
Vacuum valve opening pressure0 ~ 6.86 kPa (0 ~ 0.07kgf/cm 2 , 0 ~ 0.99 psi)

ENGINE SPECIFICATIONS CHART

Tightening Torques

ItemQuantityN.mKgf.mLb-ft
Engine mounting
Engine mounting bracket to body fixing bolt458.8 ~ 73.56.0 ~ 7.543.4 ~ 54.2
Engine mounting insulator to engine mounting support bracket fixing nut178.5 ~ 98.18.0 ~ 10.057.9 ~ 72.3
Engine mounting support bracket to engine support bracket fixing bolt178.5 ~ 98.18.0 ~ 10.057.9 ~ 72.3
Engine mounting support bracket to engine support bracket fixing nut278.5 ~ 98.18.0 ~ 10.057.9 ~ 72.3
Transaxle mounting bracket to body fixing bolt349.0 ~ 63.75.0 ~ 6.536.2 ~ 47.0
Transaxle mounting bracket to body fixing nut149.0 ~ 63.75.0 ~ 6.536.2 ~ 47.0
Transaxle mounting support bracket fixing bolt458.8 ~ 78.56.0 ~ 8.043.4 ~ 57.9
Transaxle mounting bracket to transaxle mounting support bracket fixing bolt288.3 ~ 107.99.0 ~ 11.065.1 ~ 79.6
Roll rod bracket to sub frame fixing bolt249.0 ~ 63.75.0 ~ 6.536.2 ~ 47.0
Roll rod bracket to roll rod support bracket fixing bolt & nut188.3 ~ 107.99.0 ~ 11.065.1 ~ 79.6
Timing system
Idler bolt253.9 ~ 63.75.5 ~ 6.539.7 ~ 47.0
Drive belt tensioner pulley bolt153.9 ~ 63.75.5 ~ 6.539.7 ~ 47.0
Drive belt tensioner bolt153.9 ~ 63.75.5 ~ 6.539.7 ~ 47.0
Crankshaft pulley bolt1166.6 ~ 176.417.0 ~ 18.0122.9 ~ 130.1
Timing chain cover service hole bolt111.8 ~ 14.71.2 ~ 1.58.7 ~ 10.8
Timing chain cover bolt (M6x25)77.8 ~ 9.80.8 ~ 1.05.8 ~ 7.2
Timing chain cover bolt (M8x28)718.6 ~ 22.51.9 ~ 2.313.7 ~ 16.6
Engine support bracket bolt (M8x30)119.6 ~ 24.52.0 ~ 2.514.5 ~ 18.1
Engine support bracket bolt (M10x40)139.2 ~ 44.14.0 ~ 4.528.9 ~ 32.5
Engine support bracket bolt (M10x45)239.2 ~ 44.14.0 ~ 4.528.9 ~ 32.5
Timing chain tensioner bolt29.8 ~ 11.81.0 ~ 1.27.2 ~ 8.7
Timing chain tensioner arm bolt19.8 ~ 11.81.0 ~ 1.27.2 ~ 8.7
Timing chain guide bolt39.8 ~ 11.81.0 ~ 1.27.2 ~ 8.7
Timing chain oil jet bolt17.8 ~ 9.80.8 ~ 1.05.8 ~ 7.2
Cylinder head
Engine cover mounting bolt49.8 ~ 11.81.0 ~ 1.27.2 ~ 8.7
Ignition coil bolt43.9 ~ 5.90.4 ~ 0.62.9 ~ 4.3
Cylinder head cover bolt20(3.9~5.9) + (7.8~9.8)(0.4~0.6) + (0.8~1.0)(2.9~4.3) + (5.8~7.2)
High pressure fuel pipe nut226.5 ~ 32.42.7 ~ 3.319.5 ~ 23.9
High pressure fuel pump bolt212.7 ~ 14.71.3 ~ 1.59.4 ~ 10.8
High pressure fuel pump bracket bolt318.6 ~ 23.51.9 ~ 2.413.7 ~ 17.4
CVVT bolt (LH/RH)253.9 ~ 63.75.5 ~ 6.539.7 ~ 47.0
OTS (Oil temperature sensor)119.6 ~ 39.22.0 ~ 4.014.5 ~ 28.9
Camshaft bearing cap bolt (M6) (LH/RH)16(5.9) + (10.8~12.7)(0.6) + (1.1~1.3)(4.3) + (8.0~9.4)
Camshaft bearing cap bolt (M8)4(14.7) + (27.5 ~ 31.4)(1.5) + (2.8~3.2)(10.8) + (20.3~23.1)
Cylinder head bolt10(32.4~36.3) + (90~95°) + (90~95°)(3.3~3.7) + (90~95°) + (90~95°)(23.9~26.8) + (90~95°) + (90~95°)
Engine hanger bolt (Front/Rear)227.5 ~ 31.42.8 ~ 3.220.3 ~ 23.1
Camshaft position sensor (LH/RH)29.8 ~ 11.81.0 ~ 1.27.2 ~ 8.7
Oil control valve (OCV) bolt (LH/RH)29.8 ~ 11.81.0 ~ 1.27.2 ~ 8.7
Cylinder block
Tensioner assembly integrated bracket bolt539.2 ~ 44.14.0 ~ 4.528.9 ~ 32.5
Flywheel bolt7117.7 ~ 127.512.0 ~ 13.086.8 ~ 93.9
Drive plate bolt7117.7 ~ 127.512.0 ~ 13.086.8 ~ 93.9
Oil filter bracket bolt421.6 ~ 26.52.2 ~ 2.715.9 ~ 19.5
Ladder frame bolt10(8.8~9.8) + (17.7~20.6) + (27.5~31.4)(0.9~0.1) + (1.8~2.1) + (2.8~3.2)(6.5~7.2) + (13.0~15.2) + (20.3~23.1)
Connecting rod bearing cap bolt8(17.7~21.6) + (88~92°)(1.8~2.2) + (88~92°)(13.0~15.9) + (88~92°)
Main bearing cap bolt10(14.7) + (27.5~31.4) + (120~125°)(1.5) + (2.8~3.2) + (120~125°)(10.8) + (20.3~23.1) + (120~125°)
Piston cooling oil jet bolt424.5 ~ 29.42.5 ~ 3.018.1 ~ 21.7
Crankshaft position sensor19.8 ~ 11.81.0 ~ 1.27.2 ~ 8.7
Crankshaft position sensor cover bolt29.8 ~ 11.81.0 ~ 1.27.2 ~ 8.7
Knock sensor118.6 ~ 23.51.9 ~ 2.413.7 ~ 17.4
Lubrication system
Oil drain plug134.3 ~ 44.13.5 ~ 4.525.3 ~ 32.5
Oil filter111.8 ~ 15.71.2 ~ 1.68.7 ~ 11.6
Oil level gauge assembly bolt17.8 ~ 11.80.8 ~ 1.25.8 ~ 8.7
A/C compressor bracket bolt419.6 ~ 23.52.0 ~ 2.414.5 ~ 17.4
Oil pan bolt (M6)169.8 ~ 11.81.0 ~ 1.27.2 ~ 8.7
Oil pan bolt (M9)230.4 ~ 34.33.1 ~ 3.522.4 ~ 25.3
BSM chain tensioner arm bolt19.8 ~ 11.81.0 ~ 1.27.2 ~ 8.7
BSM chain guide bolt29.8 ~ 11.81.0 ~ 1.27.2 ~ 8.7
BSM chain tensioner bolt29.8 ~ 11.81.0 ~ 1.27.2 ~ 8.7
Balance shaft module (BSM) bolt (M9x181.5)4(22.6~26.5)+(88~92°)(2.3~2.7)+(88~92°)(16.6~19.5)+(88~92°)
Balance shaft module (BSM) bolt (M9x95)2(22.6~26.5)+(43~47°)(2.3~2.7)+(43~47°)(16.6~19.5)+(43~47°)
Oil pressure switch17.8 ~ 11.80.8 ~ 1.25.8 ~ 8.7
Cooling system
Water pump pulley bolt37.8 ~ 9.80.8 ~ 1.05.8 ~ 7.2
Water pump cover bolt518.6 ~ 23.51.9 ~ 2.413.7 ~ 17.4
Water pump sub assembly bolt59.8 ~ 11.81.0 ~ 1.27.2 ~ 8.7
Water inlet fitting bolt37.8 ~ 11.80.8 ~ 1.25.8 ~ 8.7
Water temperature control assembly nut118.6 ~ 23.51.9 ~ 2.413.7 ~ 17.4
Water temperature control assembly bolt214.7 ~ 19.61.5 ~ 2.010.8 ~ 14.5
Water inlet pipe bolt19.8 ~ 11.81.0 ~ 1.27.2 ~ 8.7
Intake and exhaust system
Air intake hose clamp bolt12.9 ~ 4.90.3 ~ 0.52.2 ~ 3.6
Air cleaner assembly bolt27.8 ~ 9.80.8 ~ 1.05.8 ~ 7.2
Electronic throttle control (ETC) module bolt49.8 ~ 11.81.0 ~ 1.27.2 ~ 8.7
Intake manifold stay bolt418.6 ~ 23.51.9 ~ 2.413.7 ~ 17.4
Intake manifold bolt318.6 ~ 23.51.9 ~ 2.413.7 ~ 17.4
Intake manifold nut218.6 ~ 23.51.9 ~ 2.413.7 ~ 17.4
Oxygen sensor (Front/Rear)239.2 ~49.04.0 ~ 5.028.9 ~ 36.2
Turbocharger oil drain pipe assembly bolt27.8 ~ 11.80.8 ~ 1.25.8 ~ 7.2
Turbocharger oil drain pipe assembly nut27.8 ~ 11.80.8 ~ 1.25.8 ~ 7.2
Turbocharger water hose bolt226.5 ~ 32.42.7 ~ 3.319.5 ~ 23.9
Turbocharger oil feed pipe & hose bolt27.8 ~ 11.80.8 ~ 1.25.8 ~ 8.7
Turbocharger oil feed pipe & hose eye bolt111.8 ~ 17.71.2 ~ 1.88.7 ~ 13.0
Turbo manifold module heat protector bolt67.8 ~ 11.80.8 ~ 1.25.8 ~ 8.7
Turbo manifold module stay bolt (M8)218.6 ~ 27.51.9 ~ 2.813.7 ~ 20.3
Turbo manifold module stay bolt (M10)249.0 ~ 53.95.0 ~ 5.536.2 ~ 39.7
Turbo manifold module nut949.0 ~ 53.95.0 ~ 5.536.2 ~ 39.7
Turbo adapter nut649.0 ~ 53.95.0 ~ 5.536.2 ~ 39.7
Catalytic converter / muffler nut839.2 ~ 58.84.0 ~ 6.028.9 ~ 43.4
Intercooler inlet pipe mounting bolt114.7 ~ 19.61.5 ~ 2.010.8 ~ 14.5
Intercooler hose clamp bolt34.9 ~ 6.90.5 ~ 0.73.6 ~ 5.1
Intercooler mounting bracket bolt23.9 ~ 5.90.4 ~ 0.62.9 ~ 4.3

BOLT TIGHTENING TORQUES REFERENCE CHART