Below you'll find the tightening torques for the Kia Optima 1 in both Nm and ft/lbs. The first table contains the most-used torque settings. The tables after it contain all torque spec values I could find.

Most-used torque settings for Kia Optima 1

Part	Description	Torque (Nm)	Torque (ft/lbs)	Remarks	Applies to
Oil pan	Drain plug	35	26	Minimum
Oil pan	Drain plug	45	33	Maximum
Oil filter	Oil filter	17	13	Minimum
Oil filter	Oil filter	25	18	Maximum
Spark plugs	Spark plugs	20	15	Minimum
Spark plugs	Spark plugs	30	22	Maximum
Intake manifold	Intake manifold	18	13	Minimum
Intake manifold	Intake manifold	22	16	Maximum

To make sure these are the correct tightening torque values, you can use the data below to verify this is the right model.

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All Torque Settings in Tables

Part	Description	Torque (Nm)	Torque (ft/lbs)	Remarks	Applies to
Oil pan	Drain plug	35	26	Minimum
Oil pan	Drain plug	45	33	Maximum
Oil pan	Oil pan	10	7	Minimum
Oil pan	Oil pan	12	9	Maximum
Oil filter	Oil filter	17	13	Minimum
Oil filter	Oil filter	25	18	Maximum
Oil pressure switch	Oil pressure switch	8	6	Minimum
Oil pressure switch	Oil pressure switch	12	9	Maximum
Piston rods	Connecting rod	18	13	Minimum
Piston rods	Connecting rod	22	16	Maximum
Piston rods	Piston rod to bracket nut	20	15	Minimum
Piston rods	Piston rod to bracket nut	25	18	Maximum
Spark plugs	Spark plugs	20	15	Minimum
Spark plugs	Spark plugs	30	22	Maximum
Intake manifold	Accelator cable bolts to intake manifold	4	3	Minimum
Intake manifold	Accelator cable bolts to intake manifold	6	4	Maximum
Intake manifold	Throttle body to intake manifold	15	11	Minimum
Intake manifold	Throttle body to intake manifold	22	16	Maximum
Intake manifold	Intake manifold	18	13	Minimum
Intake manifold	Intake manifold	22	16	Maximum
Intake manifold	Intake manifold mounting bolt (M8)	15	11	Minimum
Intake manifold	Intake manifold mounting bolt (M8)	20	15	Maximum
Intake manifold	Intake manifold mounting bolt (M10)	18	13	Minimum
Intake manifold	Intake manifold mounting bolt (M10)	25	18	Maximum
Intake manifold	Intake manifold mounting nut	30	22	Minimum
Intake manifold	Intake manifold mounting nut	42	31	Maximum
Throttle body	Throttle body	15	11	Minimum
Throttle body	Throttle body	22	16	Maximum
Throttle body	ETC Mounting bolts	8	6	Minimum	2.4L Engine Theta I G4KC
Throttle body	ETC Mounting bolts	10	7	Maximum	2.4L Engine Theta I G4KC
Throttle body	ETC Mounting bolts	10	7	Minimum	2.4L MPI Engine Theta II G4KE
Throttle body	ETC Mounting bolts	12	9	Maximum	2.4L MPI Engine Theta II G4KE
Throttle body	ETC Mounting bolts	10	7	Minimum	2.0L MPI Engine Theta II G4KD
Throttle body	ETC Mounting bolts	12	9	Maximum	2.0L MPI Engine Theta II G4KD
Engine block	Engine coolant inlet fitting bolts	10	7	Minimum
Engine block	Engine coolant inlet fitting bolts	15	11	Maximum
Sensor	Fuel pressure gauge to fuel delivery pipe	25	18	Minimum
Sensor	Fuel pressure gauge to fuel delivery pipe	35	26	Maximum
Sensor	Knock sensor	16	12	Minimum
Sensor	Knock sensor	28	21	Maximum
Sensor	Heated oxygen sensor	35	26	Minimum
Sensor	Heated oxygen sensor	45	33	Maximum
Sensor	TP Sensor	2	1	Minimum
Sensor	TP Sensor	3	2	Maximum
Camshaft	Camshaft sprocket	80	59	Minimum
Camshaft	Camshaft sprocket	100	74	Maximum
Camshaft	Camshaft bearing cap	19	14	Minimum
Camshaft	Camshaft bearing cap	21	15	Maximum
Crankshaft	Crankshaft sprocket	110	81	Minimum
Crankshaft	Crankshaft sprocket	130	96	Maximum
Crankshaft	Crankshaft pulley to crankshaft sprocke	20	15	Minimum
Crankshaft	Crankshaft pulley to crankshaft sprocke	30	22	Maximum
Water pump	Coolant pump	20	15	Minimum
Water pump	Coolant pump	27	20	Maximum
Belt tensioner/Timing chains	Auto tensioner bolt	20	15	Minimum
Belt tensioner/Timing chains	Auto tensioner bolt	27	20	Maximum
Valve cover	Valve cover	8	6	Minimum
Valve cover	Valve cover	10	7	Maximum
Fuel system	High pressure hose flare nut	30	22	Minimum
Fuel system	High pressure hose flare nut	40	30	Maximum

Part	Description	Torque (Nm)	Torque (ft/lbs)	Remarks	Applies to
Wheel hub assembly	Wheel bearing	200	148
Clutch assembly	Clutch cover bolt	20	15	Minimum	2.4L Engine Theta I G4KC
Clutch assembly	Clutch cover bolt	27	20	Maximum	2.4L Engine Theta I G4KC
Flywheel/Flex plate	Flex Plate	73	54	Minimum
Flywheel/Flex plate	Flex Plate	77	57	Maximum
Flywheel/Flex plate	Flywheel Bolts	130	96	Minimum
Flywheel/Flex plate	Flywheel Bolts	140	103	Maximum

Part	Description	Torque (Nm)	Torque (ft/lbs)	Remarks	Applies to
Steering wheel	Wheel Fastener Wheel Nut	90	66	Minimum
Steering wheel	Wheel Fastener Wheel Nut	110	81	Maximum

Part	Description	Torque (Nm)	Torque (ft/lbs)	Remarks	Applies to
Exhaust manifold	Exhaust pipe clamp bolt	20	15	Minimum	Front
Exhaust manifold	Exhaust pipe clamp bolt	30	22	Maximum	Front
Exhaust manifold	Exhaust pipe nuts to exhaust manifold	30	22	Minimum	Front
Exhaust manifold	Exhaust pipe nuts to exhaust manifold	40	30	Maximum	Front
Exhaust manifold	Exhaust pipe bolt to engine	20	15	Minimum	Front
Exhaust manifold	Exhaust pipe bolt to engine	30	22	Maximum	Front
Exhaust manifold	Centre exhaust pipe nuts to cataylic converter	30	22	Minimum
Exhaust manifold	Centre exhaust pipe nuts to cataylic converter	40	30	Maximum
Exhaust manifold	Center exhaust pipe bolts to main muffler	30	22	Minimum
Exhaust manifold	Center exhaust pipe bolts to main muffler	40	30	Maximum
Exhaust manifold	Center exhaust pipe bolt to bracket	10	7	Minimum
Exhaust manifold	Center exhaust pipe bolt to bracket	15	11	Maximum
Exhaust manifold	Exhaust manifold nuts to engine nut (M8)	25	18	Minimum
Exhaust manifold	Exhaust manifold nuts to engine nut (M8)	30	22	Maximum
Exhaust manifold	Exhaust manifold nuts to engine nut (M10)	35	26	Minimum
Exhaust manifold	Exhaust manifold nuts to engine nut (M10)	55	41	Maximum
Exhaust manifold	Heat protector bolt to exhaust manifold	12	9	Minimum
Exhaust manifold	Heat protector bolt to exhaust manifold	15	11	Maximum
Muffler	Resonator mounting bolt	8	6	Minimum
Muffler	Resonator mounting bolt	10	7	Maximum
Muffler	Resonator mounting nut	4	3	Minimum
Muffler	Resonator mounting nut	6	4	Maximum
Catalytic converter	Hanger bolt to body (M8)	25	18	Minimum
Catalytic converter	Hanger bolt to body (M8)	30	22	Maximum
Catalytic converter	Hanger bolt to body (M10)	35	26	Minimum
Catalytic converter	Hanger bolt to body (M10)	55	41	Maximum
Catalytic converter	Hanger bolt to main muffler	10	7	Minimum
Catalytic converter	Hanger bolt to main muffler	15	11	Maximum

Part	Description	Torque (Nm)	Torque (ft/lbs)	Remarks	Applies to
Disc brake	Bleeder screw	7	5	Minimum
Disc brake	Bleeder screw	13	10	Maximum
Disc brake	Brake Caliper	22	16	Caliper guide rod bolt (Min.)
Disc brake	Brake Caliper	32	24	Caliper guide rod bolt (Max.)
Disc brake	Brake Caliper	69	51	Caliper assembly to knuckle (Min. )
Disc brake	Brake Caliper	85	63	Caliper assembly to knuckle (Max. )
Disc brake	Brake Caliper	25	18	Brake hose to front caliper (Min.)
Disc brake	Brake Caliper	30	22	Brake hose to front caliper (Max.)
Disc brake	Brake Caliper	50	37	Rear caliper to carrier (Min.)
Disc brake	Brake Caliper	60	44	Rear caliper to carrier (Max.)
Brake line	Brake tube nut	13	10	Minimum
Brake line	Brake tube nut	17	13	Maximum
Brake booster	Brake booster	13	10	Minimum
Brake booster	Brake booster	16	12	Maximum
Brake pedal	Accelerator arm bracket bolts	8	6	Minimum
Brake pedal	Accelerator arm bracket bolts	12	9	Maximum
Master cylinder	Master cylinder	35	26	Minimum
Master cylinder	Master cylinder	55	41	Maximum

Part	Description	Torque (Nm)	Torque (ft/lbs)	Remarks	Applies to
Struts	Strut Upper Mounting Nut	40	30	Minimum
Struts	Strut Upper Mounting Nut	50	37	Maximum
Struts	Strut Mounting Self-Locking Nut	25	18	Maximum
Struts	Strut Mounting Self-Locking Nut	20	15	Minimum
Struts	Fork To Lower Arm Connector Nut	100	74	Minimum
Struts	Fork To Lower Arm Connector Nut	120	89	Maximum
Struts	Fork To Strut Mounting Bolt	60	44	Minimum
Struts	Fork To Strut Mounting Bolt	80	59	Maximum
Shock absorbers/shocks	Shock Absorber Upper Mounting Nut	40	30	Minimum
Shock absorbers/shocks	Shock Absorber Upper Mounting Nut	50	37	Maximum
Shock absorbers/shocks	Shock Absorber Lower Mounting Bolt	80	59	Minimum
Shock absorbers/shocks	Shock Absorber Lower Mounting Bolt	90	66	Maximum
Shock absorbers/shocks	Shock Absorber Mounting Self-Locking Nut	20	15	Minimum
Shock absorbers/shocks	Shock Absorber Mounting Self-Locking Nut	25	18	Maximum
Stabilizer bar	Stabilizer Bar Bracket To Sub-Frame Bolt	30	22	Minimum
Stabilizer bar	Stabilizer Bar Bracket To Sub-Frame Bolt	45	33	Maximum
Stabilizer bar	Stabilizer Bar Bracket Crossmember Bolt	35	26	Minimum
Stabilizer bar	Stabilizer Bar Bracket Crossmember Bolt	45	33	Maximum
Sway bar links/Stabilizer links	Stabilizer Link Stabilizer Link Mounting Self-Locking Nut	35	26	Minimum
Sway bar links/Stabilizer links	Stabilizer Link Stabilizer Link Mounting Self-Locking Nut	45	33	Maximum
Trailing arm	Trailing Arm To Body Nut	140	103	Minimum
Trailing arm	Trailing Arm To Body Nut	160	118	Maximum
Trailing arm	Trailing Arm To Carrier Nut	100	74	Minimum
Trailing arm	Trailing Arm To Carrier Nut	120	89	Maximum
Ball joint	Ball joint	1	1	Minimum
Ball joint	Ball joint	3	2	Maximum
Ball joint	Upper Front Upper Arm Ball Joint Self-Locking Nut	35	26	Minimum
Ball joint	Upper Front Upper Arm Ball Joint Self-Locking Nut	45	33	Maximum
Ball joint	Lower Lower Arm Ball Joint Self-Locking Nut	75	55	Minimum
Ball joint	Lower Lower Arm Ball Joint Self-Locking Nut	90	66	Maximum
Ball joint	Lower Arm Ball Joint To Knuckle Mounting Bolt	100	74	Minimum
Ball joint	Lower Arm Ball Joint To Knuckle Mounting Bolt	120	89	Maximum

Part	Description	Torque (Nm)	Torque (ft/lbs)	Remarks	Applies to