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Engine Mechanical (G6EA - Gsl 2.7L): Specifications Kia Optima II

Mechanical

SPECIFICATIONS

Description			Specifications	Limit
General
Type			V-type, DOHC
Number of cylinder			6
Bore			86.7 mm (3.4134 in.)
Stroke			75 mm (2.9528 in.)
Total displacement			2,656 cc
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			0.03 mm (0.0012 in.) or less	0.05 mm (0.0020 in.)
Flatness of manifold mounting	Intake		0.15 mm (0.0059 in.) or less
Flatness of manifold mounting	Exhaust		0.15 mm (0.0059 in.) or less
Camshaft
Cam height	LH Camshaft	Intake	44.5 mm (1.7520 in.)
	LH Camshaft	Exhaust	44.5 mm (1.7520 in.)
	RH Camshaft	Intake	44.5 mm (1.7520 in.)
	RH Camshaft	Exhaust	44.5 mm (1.7520 in.)
Journal outer diameter	LH Camshaft	Intake	27.964-27.980 mm (1.1009-1.1016 in.)
	LH Camshaft	Exhaust	27.964-27.980 mm (1.1009-1.1016 in.)
	RH Camshaft	Intake	27.964-27.980 mm (1.1009-1.1016 in.)
	RH Camshaft	Exhaust	27.964-27.980 mm (1.1009-1.1016 in.)
Bearing oil clearance	Intake		0.020-0.057 mm (0.0008-0.0022 in.)
Bearing oil clearance	Exhaust		0.020-0.057 mm (0.0008-0.0022 in.)
End play			0.1-0.2 mm (0.0039-0.0079 in.)
Valve
Valve length	Intake		110.1 mm (4.3346 in.)
Valve length	Exhaust		111.1 mm (4.3740 in.)
Stem outer diameter	Intake		5.965-5.980 mm (0.2348-0.2354 in.)
Stem outer diameter	Exhaust		5.950-5.965 mm (0.2343-0.2348 in.)
Face angle			45°-45.5°
Thickness of valve head (margin)	Intake		1.0 mm (0.0394 in.)
Thickness of valve head (margin)	Exhaust		1.3 mm (0.0512 in.)
Valve stem to valve guide clearance	Intake		0.020-0.050 mm (0.0008-0.0020 in.)	0.10 mm (0.0039 in.) or less
Valve stem to valve guide clearance	Exhaust		0.035-0.065 mm (0.0014-0.0026 in.)	0.13 mm (0.0051 in.) or less
Valve guide
Inner diameter	Intake		6.000-6.015 mm (2.2362-2.2368 in.)
Inner diameter	Exhaust		6.000-6.015 mm (2.2362-2.2368 in.)
Length	Intake		45.8-46.2 mm (1.8031-1.8189 in.)
Length	Exhaust		46.8-47.2 mm (1.8425-1.8583 in.)
Valve spring
Free length			46.8 mm (1.8425 in.)
Load	Height: 35mm		180.5-199.5 N (18.4-20.3 Kgf, 40.6-44.8 l b)
Load	Height: 26.5mm		342-378 N (34.9-38.6 Kgf, 76.9-85. 1lb)
Out of squareness			1.5° or less
MLA (Mechanical Lash Adjuster)
MLA outer diameter	Intake		29.964-29.980 mm (1.1797-1.1803 in.)
MLA outer diameter	Exhaust		29.964-29.980 mm (1.1797-1.1803 in.)
Cylinder head tappet bore inner diameter	Intake		30.000-30.025 mm (1.1811-1.1821 in.)
Cylinder head tappet bore inner diameter	Exhaust		30.000-30.025 mm (1.1811-1.1821 in.)
MLA to tappet bore clearance	Intake		0.020-0.061 mm (0.0008-0.0024 in.)	0.07 mm (0.0027 in.) or less
MLA to tappet bore clearance	Exhaust		0.020-0.061 mm (0.0008-0.0024 in.)	0.07mm (0.0027 in.) or less
Valve clearance
Intake			0.17-0.23 mm (0.0067-0.0090 in.)	0.10-0.30 mm (0.0039-0.0118 in.)
Exhaust			0.27-0.33 mm (0.0106-0.0129 in.)	0.20-0.40 mm (0.0078-0.0157 in.)
Cylinder block
Cylinder bore			86.70-86.73 mm (3.4134-3.4146 in.)
Flatness of gasket surface			Less than 0.05 mm (0.0019 in.) [Less than 0.02 mm (0.0008 in.) / 150x150]
Piston
Piston outer diameter			86.67-86.70 mm ( 3.4122-3.4134 in.)
Piston to cylinder clearance			0.02-0.04 mm ( 0.0008-0.0016 in.)
Ring groove width	No. 1 ring groove		1.23-1.25 mm (0.0484-0.0492 in.)
	No. 2 ring groove		1.22-1.24 mm (0.0480-0.0488 in.)
	Oil ring groove		2.01-2.03 mm (0.0791-0.0799 in.)
Piston O.S.			0.25 mm (0.0098 in.), 0.50 mm (0.0197 in.)
Piston ring
Side clearance	No. 1 ring		0.04-0.08 mm (0.0016-0.0031 in.)	0.1mm (0.0039 in.)
	No. 2 ring		0.03-0.07 mm (0.0012-0.0027 in.)	0.1 mm (0.0039 in.)
	Oil ring		0.06-0.15 mm (0.0024-0.0059 in.)	0.2 mm (0.0079 in.)
End gap	No. 1 ring		0.15-0.30 mm (0.0059-0.0118 in.)	0.6 mm (0.0236 in.)
	No. 2 ring		0.30-0.45 mm (0.0118-0.0177 in.)	0.7 mm (0.0275 in.)
	Oil ring		0.20-0.70 mm (0.0078-0.0275 in.)	0.8 mm (0.0315 in.)
Piston ring O.S.			0.25 mm (0.0098 in.), 0.50mm (0.0197 in.)
Piston pin
Piston pin outer diameter			21.001-21.007 mm (0.8268-0.8270 in.)
Piston pin hole inner diameter			21.014-21.023 mm (0.8273-0.8277 in.)
Piston pin hole clearance			0.011-0.018 mm (0.0004-0.0007 in.)	3 Grade
Connecting rod small end inner diameter			20.974-20.985 mm (0.8257-0.8262 in.)
Connecting rod small end hole interference			0.016-0.033 mm (0.0006-0.0013 in.)
Connecting rod
Connecting rod big end inner diameter			51.000-51.018 mm (2.0079-2.0086 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.)	0.4mm (0.0157 in.)
Crankshaft
Main journal outer diameter			61.982-62.000 mm (2.4402-2.4409 in.)
Pin journal outer diameter			47.982-48.000 mm (1.8891-1.8898 in.)
Main bearing oil clearance			0.004-0.022 mm (0.0002-0.0009 in.)
End play			0.07-0.25 mm (0.0028-0.0098 in.)	0.30 mm (0.0118 in.)
Oil pump
Relief valve opening pressure			490.33-588.40 kPa (5.0-6.0 kgf/cm 2 , 71.12-85.34 psi)
Engine oil
Oil quantity (Total)			4.5L (4.76 U.S.qts, 3.96 imp.qts)
Oil quantity (Oil pan)			4.2L (4.44 U.S.qts, 3.70 imp.qts)
Oil quantity (Oil filter)			0.3L (0.32 U.S.qts, 0.26 imp.qts)
Oil quality			Above SJ or SL
Oil pressure			130 kPa (1.32 kgf/cm 2 , 18.77 psi) [at 1000 RPM, 110°C (230°F)]
Cooling system
Cooling method			Forced circulation with electrical fan
Coolant quantity			8.2-8.3L (8.66-8.77 U.S.qts, 7.22-7.30 imp.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		10 mm (0.3937 in.) or more
Radiator cap	Main valve opening pressure		93.16-122.58 kPa (0.95-1.25 kg/cm 2 , 13.51-17.78 psi)
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 TORQUE

Item	Quantity	N.m	Kgf.m
Oil seal case bolt	3	9.8-11.8	1.0-1.2
Main bearing cap bolt ( M10)	8	29.4 + 90°	3.0 + 90°
Main bearing cap bolt (M8)	8	15.7 + 90°	1.6 + 90°
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	24.5 + 60° + 45°	2.5 + 60° + 45°
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	19.6-90°	2.0-90°
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	18.6-23.5	1.9-2.4
Surge tank bolt (8x80)	2	18.6-23.5	1.9-2.4
Surge tank nut	2	18.6-23.5	1.9-2.4
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	39.2-58.8	4.0-6.0

TIGHTENING TORQUE