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Section: Mechanical

Engine and Transaxle Assembly - 2.7L

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General Information (Engine Mechanical System) - 2.7L: Specifications Kia Optima II рестайлинг

Mechanical

Specifications

Description			Specifications	Limit
General
Type			V-type, DOHC
Number of cylinder			6
Bore			86.7mm (3.4134in.)
Stroke			75mm (2.9528in.)
Total displacement			2,656cc
Compression ratio			10.4
Firing order			1-2-3-4-5-6
Valve timing
Intake valve	Opens (ATDC)		4° ~ -56°
Intake valve	Closes (ABDC)		60° ~ 0°
Exhaust valve	Opens (BBDC)		46°
Exhaust valve	Closes (ATDC)		10°
Cylinder head
Flatness of gasket surface			0.03mm (0.0012in.) or less	0.05mm (0.0020in.)
Flatness of manifold mounting	Intake		0.15mm (0.0059in.) or less
Flatness of manifold mounting	Exhaust		0.15mm (0.0059in.) or less
Camshaft
Cam height	LH Camshaft	Intake	44.5mm (1.7520in.)
	LH Camshaft	Exhaust	44.5mm (1.7520in.)
	RH Camshaft	Intake	44.5mm (1.7520in.)
	RH Camshaft	Exhaust	44.5mm (1.7520in.)
Journal outer diameter	LH Camshaft	Intake	27.964 ~ 27.980mm (1.1009 ~ 1.1016in.)
	LH Camshaft	Exhaust	27.964 ~ 27.980mm (1.1009 ~ 1.1016in.)
	RH Camshaft	Intake	27.964 ~ 27.980mm (1.1009 ~ 1.1016in.)
	RH Camshaft	Exhaust	27.964 ~ 27.980mm (1.1009 ~ 1.1016in.)
Bearing oil clearance	Intake		0.020 ~ 0.057mm (0.0008 ~ 0.0022in.)
Bearing oil clearance	Exhaust		0.020 ~ 0.057mm (0.0008 ~ 0.0022in.)
End play			0.1 ~ 0.2mm (0.0039 ~ 0.0079in.)
Valve
Valve length	Intake		110.1mm (4.3346in.)
Valve length	Exhaust		111.1mm (4.3740in.)
Stem outer diameter	Intake		5.965 ~ 5.980mm (0.2348 ~ 0.2354in.)
Stem outer diameter	Exhaust		5.950 ~ 5.965mm (0.2343 ~ 0.2348in.)
Face angle			45° ~ 45.5°
Thickness of valvehead (margin)	Intake		1.0mm (0.0394in.)
Thickness of valvehead (margin)	Exhaust		1.3mm (0.0512in.)
Valve stem to valve guide clearance	Intake		0.020 ~ 0.050mm (0.0008 ~ 0.0020in.)	0.10mm (0.0039in.) or less
Valve stem to valve guide clearance	Exhaust		0.035 ~ 0.065mm (0.0014 ~ 0.0026in.)	0.13mm (0.0051in.) or less
Valve guide
Inner diameter	Intake		6.000 ~ 6.015mm (2.2362 ~ 2.2368in.)
Inner diameter	Exhaust		6.000 ~ 6.015mm (2.2362 ~ 2.2368in.)
Length	Intake		45.8 ~ 46.2mm (1.8031 ~ 1.8189in.)
Length	Exhaust		46.8 ~ 47.2mm (1.8425 ~ 1.8583in.)
Valve spring
Free length			46.8mm (1.8425in.)
Load	Height: 35mm		180.5 ~ 199.5N (18.4 ~ 20.3Kgf, 40.6 ~ 44.8lb)
Load	Height: 26.5mm		342 ~ 378N (34.9 ~ 38.6Kgf, 76.9 ~ 85.1lb)
Out of squareness			1.5° or less
MLA (Mechanical Lash Adjuster)
MLA outer diameter	Intake		29.964 ~ 29.980mm (1.1797 ~ 1.1803in.)
MLA outer diameter	Exhaust		29.964 ~ 29.980mm (1.1797 ~ 1.1803in.)
Cylinder head tappet bore inner diameter	Intake		30.000 ~ 30.025mm (1.1811 ~ 1.1821in.)
Cylinder head tappet bore inner diameter	Exhaust		30.000 ~ 30.025mm (1.1811 ~ 1.1821in.)
MLA to tappet bore clearance	Intake		0.020 ~ 0.061mm (0.0008 ~ 0.0024in.)	0.07mm (0.0027in.) or less
MLA to tappet bore clearance	Exhaust		0.020 ~ 0.061mm (0.0008 ~ 0.0024in.)	0.07mm (0.0027in.) or less
Valve clearance (Engine coolant temperature 20°C [68°F])
Intake			0.17 ~ 0.23mm (0.0067 ~ 0.0090in.)	0.10 ~ 0.30mm (0.0039 ~ 0.0118in.)
Exhaust			0.27 ~ 0.33mm (0.0106 ~ 0.0129in.)	0.20 ~ 0.40mm (0.0078 ~ 0.0157in.)
Cylinder block
Cylinder bore			86.70 ~ 86.73mm (3.4134 ~ 3.4146in.)
Flatness of gasket surface			Less than 0.05mm (0.0019in.) [Less than 0.02mm (0.0008in.)/150x150]
Piston
Piston outer diameter			86.67 ~ 86.70mm (3.4122 ~ 3.4134in.)
Piston to cylinder clearance			0.02 ~ 0.04mm (0.0008 ~ 0.0016in.)
Ring groove width	No. 1 ring groove		1.23 ~ 1.25mm (0.0484 ~ 0.0492in.)
	No. 2 ring groove		1.22 ~ 1.24mm (0.0480 ~ 0.0488in.)
	Oil ring groove		2.01 ~ 2.03mm (0.0791 ~ 0.0799in.)
Piston O.S.			0.25mm (0.0098in.), 0.50mm (0.0197in.)
Piston ring
Side clearance	No. 1 ring		0.04 ~ 0.08mm (0.0016 ~ 0.0031in.)	0.1mm (0.0039in.)
	No. 2 ring		0.03 ~ 0.07mm (0.0012 ~ 0.0027in.)	0.1mm (0.0039in.)
	Oil ring		0.06 ~ 0.15mm (0.0024 ~ 0.0059in.)	0.2mm (0.0079in.)
End gap	No. 1 ring		0.15 ~ 0.30mm (0.0059 ~ 0.0118in.)	0.6mm (0.0236in.)
	No. 2 ring		0.30 ~ 0.45mm (0.0118 ~ 0.0177in.)	0.7mm (0.0275in.)
	Oil ring		0.20 ~ 0.70mm (0.0078 ~ 0.0275in.)	0.8mm (0.0315in.)
Piston ring O.S.			0.25mm (0.0098in.), 0.50mm (0.0197in.)
Piston pin
Piston pin outer diameter			21.001 ~ 21.007mm (0.8268 ~ 0.8270in.)
Piston pin hole inner diameter			21.014 ~ 21.023mm (0.8273 ~ 0.8277in.)
Piston pin hole clearance			0.011 ~ 0.018mm (0.0004 ~ 0.0007in.)	3 Grade
Connecting rod small end inner diameter			20.974 ~ 20.985mm (0.8257 ~ 0.8262in.)
Connecting rod small end hole interference			0.016 ~ 0.033mm (0.0006 ~ 0.0013in.)
Connecting rod
Connecting rod big end inner diameter			51.000 ~ 51.018mm (2.0079 ~ 2.0086in.)
Connecting rod bearing oil clearance			0.018 ~ 0.036mm (0.0007 ~ 0.0014in.)
Side clearance			0.1 ~ 0.25mm (0.0039 ~ 0.0098in.)	0.4mm (0.0157in.)
Crankshaft
Main journal outer diameter			61.982 ~ 62.000mm (2.4402 ~ 2.4409in.)
Pin journal outer diameter			47.982 ~ 48.000mm (1.8891 ~ 1.8898in.)
Main bearing oil clearance			0.004 ~ 0.022mm (0.0002 ~ 0.0009in.)
End play			0.07 ~ 0.25mm (0.0028 ~ 0.0098in.)	0.30mm (0.0118in.)
Oil pump
Relief valve opening pressure			490.33 ~ 588.40kPa (5.0 ~ 6.0kgf/cm 2 , 71.12 ~ 85.34 psi)
Engine oil
Oil quantity (Total)			4.8 L (5.07 US qt, 4.22 Imp qt)
Oil quantity (Oil pan)			4.2 L (4.43 US qt, 3.69 Imp qt)
Oil filter			0.3 L (0.32 US qt, 0.26 Imp qt)
Oil quantity (Drain and refill including oil filter)			4.5 L (4.75 US qt, 3.95 Imp qt)
Oil quality			ABOVE API SJ/SL or SAE 5W-20
Oil pressure			127kPa (1.3kgf/cm 2 , 18 psi) [at 1000rpm, 110°C (230°F)]
Cooling system
Cooling method			Forced circulation with electrical fan
Coolant quantity			8.2~8.3L (8.66~8.77U.S.qts, 7.22~7.30Imp.qts)
Thermostat	Type		Wax pellet type
	Opening temperature		82±2°C (179.6±35.6°F)
	Fully opened temperature		95°C (203°F)
	Full lift		10mm (0.3937in.) or more
Radiator cap	Main valve opening pressure		93.16 ~ 122.58kpa (0.95 ~ 1.25 kg/cm 2 , 13.51 ~ 17.78psi)
Radiator cap	Vacuum valve opening pressure		0.98 ~ 4.90 kpa (0.01 ~ 0.05 kg/cm 2 , 0.14 ~ 0.71 psi)
Engine coolant temperature sensor
Type			Thermistor type
Resistance	20°C (68°F)		2.31 ~ 2.59 kohms
Resistance	80°C (176°F)		0.3222 kohms

GENERAL SPECIFICATIONS

Tightening Torques

Item	Quantity	Nm	Kgf.m
Oil seal case bolt	3	9.8 ~ 11.8	1.0 ~ 1.2
Main bearing cap bolt (M10)	8	(26.5~32.4) + (90~95°)	(2.7~3.3) + (90~95°)
Main bearing cap bolt (M8)	8	(12.7~18.6) + (90~95°)	(1.3~1.9) + (90~95°)
Rear plate bolt	1	9.8 ~ 11.8	1.0 ~ 1.2
Oil pump case bolt (8x25)	1	18.6 ~ 23.5	1.9 ~ 2.4
Oil pump case bolt (8x35)	1	18.6 ~ 23.5	1.9 ~ 2.4
Timing Oil pump case bolt (8x65)	1	18.6 ~ 23.5	1.9 ~ 2.4
Timing Oil relief plug	1	39.2 ~ 49.0	4.0 ~ 5.0
Oil filter bracket bolt (8x35)	4	18.6 ~ 23.5	1.9 ~ 2.4
Oil filter bracket bolt (8x65)	2	18.6 ~ 23.5	1.9 ~ 2.4
Oil filter insert	1	44.1 ~ 53.9	4.5 ~ 5.5
Timing belt cover bolt	21	9.8 ~ 11.8	1.0 ~ 1.2
Upper oil pan bolt (8x22)	15	18.6 ~ 23.5	1.9 ~ 2.4
Upper oil pan bolt (163.5mm)	1	4.9 ~ 6.9	0.5 ~ 0.7
Upper oil pan bolt (154.5mm)	1	4.9 ~ 6.9	0.5 ~ 0.7
Lower oil pan bolt	11	9.8 ~ 11.8	1.0 ~ 1.2
Oil drain plug	1	34.3 ~ 44.1	3.5 ~ 4.5
Engine support bracket bolt (10x94)	2	58.8 ~ 68.6	6.0 ~ 7.0
Engine support bracket bolt (10x102.5)	1	58.8 ~ 68.6	6.0 ~ 7.0
Camshaft bearing cap bolt (6x38)	24	10.8 ~ 12.7	1.1 ~ 1.3
Camshaft bearing cap bolt (8x38)	12	20.6 ~ 25.5	2.1 ~ 2.6
Cylinder head bolt	16	(22.6~26.5) + (58~62°) + (43~47°)	(2.3~2.7) + (58~62°) + (43~47°)
Cylinder head cover bolt	22	7.8 ~ 9.8	0.8 ~ 1.0
Crankshaft pulley bolt	1	166.7 ~ 176.5	17.0 ~ 18.0
Drive plate bolt	8	71.6 ~ 75.5	7.3 ~ 7.7
Connecting rod bearing cap bolt	12	(17.7~21.6) + (90~94°)	(1.8~2.2) + (90~94°)
OCV (Oil Control Valve) bolt	2	7.8 ~ 9.8	0.8 ~ 1.0
CVVT & exhaust cam sprocket bolt	4	66.7 ~ 78.5	6.8 ~ 8.0
Timing chain auto tensioner bolt	4	10.8 ~ 12.7	1.1 ~ 1.3
Camshaft sprocket bolt	2	88.3 ~ 107.9	9.0 ~ 11.0
Timing belt idler bolt	1	49.0 ~ 58.8	5.0 ~ 6.0
Timing belt tensioner bolt	2	19.6 ~ 26.5	2.0 ~ 2.7
Timing belt tensioner arm bolt	1	34.3 ~ 53.9	3.5 ~ 5.5
Water pump bolt (8x20)	3	14.7 ~ 21.6	1.5 ~ 2.2
Water pump bolt (8x25)	4	14.7 ~ 21.6	1.5 ~ 2.2
Drive belt idler bolt	1	34.3 ~ 53.9	3.5 ~ 5.5
Drive belt tensioner bolt	1	34.3 ~ 53.9	3.5 ~ 5.5
Water pipe bolt	1	16.7 ~ 19.6	1.7 ~ 2.0
Water temp. control assembly nut	4	29.4 ~ 41.2	3.0 ~ 4.2
Oil level gauge bolt	1	18.6 ~ 23.5	1.9 ~ 2.4
Oil screen bolt	2	14.7 ~ 21.6	1.5 ~ 2.2
Water outlet fitting bolt	3	16.7 ~ 19.6	1.7 ~ 2.0
Water inlet fitting bolt	2	16.7 ~ 19.6	1.7 ~ 2.0
Water inlet fitting nut	1	16.7 ~ 19.6	1.7 ~ 2.0
Surge tank bolt (8x28)	3	9.8 ~ 11.8	1.0 ~ 1.2
Surge tank bolt (8x80)	2	9.8 ~ 11.8	1.0 ~ 1.2
Surge tank nut	2	9.8 ~ 11.8	1.0 ~ 1.2
Intake manifold bolt	4	18.6 ~ 23.5	1.9 ~ 2.4
Intake manifold nut	4	18.6 ~ 23.5	1.9 ~ 2.4
Surge tank bracket bolt	2	18.6 ~ 23.5	1.9 ~ 2.4
Exhaust manifold bolt	14	29.4 ~ 34.3	3.0 ~ 3.5
Heat protect bolt	6	16.7 ~ 21.6	1.7 ~ 2.2
Front muffler bolt	2	39.2 ~ 53.9	4.0 ~ 5.5

TIGHTENING TORQUES SPECIFICATION