Kia Optima Hybrid: Intake And Exhaust System / Exhaust Manifold Repair procedures

Kia Optima Hybrid (TF HEV) 2016-2020 Service Manual / Engine Mechanical System / Intake And Exhaust System / Exhaust Manifold Repair procedures

Removal and Installation

1.	Remove the engine cover.

Disconnect the battery negative terminal.

Tightening torque:

4.0 ~ 6.0N.m (0.4 ~ 0.6kgf.m, 3.0 ~ 4.4lb-ft)

3.	Disconnect the oxygen sensor connectors (A).

Remove the front muffler (A).

Tightening torque:

39.2 ~ 58.8 N.m (4.0 ~ 6.0 kgf.m, 28.9 ~ 43.4 lb-ft)

Using the SST (09392-2H100) (A), remove the front oxygen sensor (B) and the remove the exhaust manifold heat protector (C).

Tightening torque :

Oxygen sensor :

39.2 ~ 49.0 N.m (4.0 ~ 5.0 kgf.m, 28.9 ~ 36.2lb-ft)

Heat protector bolts :

7.8 ~ 11.8N.m (0.8 ~ 1.2kgf.m, 5.8 ~ 8.7lb-ft)

6.	Remove the driveshaft heat protector (A).

Remove the exhaust manifold stay (A).

Tightening torque :

M8 bolts: 18.6 ~ 27.5N.m (1.9 ~ 2.8kgf.m, 13.7 ~ 20.3lb-ft)

M10 bolts: 51.9 ~ 57.8.m (5.3 ~ 5.9kgf.m, 38.3 ~ 42.6lb-ft)

8.	Remove the engine hanger and cam position sensor cover (A).

Remove the exhaust manifold (A) with the gasket (B).

Tightening torque

49.0 ~ 53.9N.m (5.0 ~ 5.5kgf.m, 36.2 ~ 39.7lb-ft)

When installing, replace with a new gasket.

When installing the intake manifold, tighten the nuts with pre-torque first, and then tighten the nuts with specified torque in the sequence shown.

10.	Installation is reverse order of removal.

Exhaust Manifold Components and Components Location

Components 1. Heat protector2. Exhaust manifold3. Exhaust manifold gasket4. Exhaust manifold stay ...

Muffler Components and Components Location

Components 1. Front muffler2. Catalytic converter3. Center muffler4. Main muffler5. Gasket6. Hanger ...

Other information:

Kia Optima Hybrid (TF HEV) 2016-2020 Service Manual: Front Driveshaft Repair procedures

Replacement 1. Loosen the wheel nuts slightly. Raise the vehicle, and make sure it is securely supported. 2. Remove wheel nuts, front wheel and tire from front hub. Tightening torque: 88.2 ~ 107.8 N.m (9.0 ~ 11.0 kgf.m, 65.0 ~ 79.5 lb-ft) Be careful not to damage to the wheel nuts when ...

Kia Optima Hybrid (TF HEV) 2016-2020 Service Manual: Heated Oxygen Sensor (HO2S) Description and Operation

Description Heated Oxygen Sensor (HO2S) consists of zirconium and alumina and is installed both upstream and downstream of the Catalytic Converter. It varies in accordance with the air/fuel ratio. The sensor must be hot in order to operate normally. To keep it hot, the sensor has a heater which is controlled ...