Kia Cadenza YG: Intake And Exhaust System / Exhaust Manifold Repair procedures

Removal and Installation
[LH]
1.
Disconnect the LH front and rear heated oxygen sensor (HO2S) connector.
(Refer to Fuel System - "Heated Oxygen Sensor (HO2S)")
2.
Remove the front muffler.
(Refer to Intake And Exhaust System - "Muffler")
3.
Remove the cooling fan assembly.
(Refer to Cooling System - "Cooling Fan")
4.
Remove oil level gauge assembly.
(Refer to Lubrication System - "Oil Level Gauge & Pipe")
5.
Remove the LH exhaust manifold heat protector (A).

Tightening torque :
9.8 ~ 11.8N.m (1.0 ~ 1.2kgf.m, 7.2 ~ 8.7lb-ft)

6.
Remove the LH exhaust manifolds stay (A),and then remove the LH exhaust manifold (B) and gasket.

Tightening torque
Stay bolt :
24.5 ~ 35.3N.m (2.5 ~ 3.6kgf.m, 18.1 ~ 26.0lb-ft)
Manifold nuts :
49.0 ~ 53.9N.m (5.0 ~ 5.5kgf.m, 36.2 ~ 39.8lb-ft)

7.
Install in the reverse order of removal.
   
When installing the exhaust manifold, tighten the nuts with pre-torque first and then tighten the nuts with specified torque in the sequence shown.

[RH]
1.
Disconnect the RH front and rear heated oxygen sensor (HO2S) connector.
(Refer to Fuel System - "Heated Oxygen Sensor (HO2S)")
2.
Remove the surge tank.
(Refer to Intake And Exhaust System - "Surge Tank")
3.
Remove the front muffler.
(Refer to Intake And Exhaust System - "Muffler")
4.
Remove the RH exhaust manifold heat protector (A).

Tightening torque :
9.8 ~ 11.8N.m (1.0 ~ 1.2kgf.m, 7.2 ~ 8.7lb-ft)

5.
Remove the RH exhaust manifolds stay (A),and then remove the RH exhaust manifold (B) and gasket.

Tightening torque
Stay bolt :
24.5 ~ 35.3N.m (2.5 ~ 3.6kgf.m, 18.1 ~ 26.0lb-ft)
Manifold nuts :
49.0 ~ 53.9N.m (5.0 ~ 5.5kgf.m, 36.2 ~ 39.8lb-ft)

6.
Install in the reverse order of removal.
   
When installing the exhaust manifold, tighten the nuts with pre-torque first and then tighten the nuts with specified torque in the sequence shown.

    Components 1. LH Exhaust manifold gasket2. LH Exhaust manifold3. LH Heat protector4. LH Exhaust manifold stay5. RH Exhaust manifold gasket6. RH Exhaust manifold7.

    Removal and Installation VIS 1 [Intake Manifold] 1. Disconnect the battery "-" terminal. 2. Remove the engine cover. 3. Disconnect the VIS actuator hose (A).

    Other information:

    Kia Cadenza YG 2016-2021 Service Manual: Components and Components Location

    C

    Kia Cadenza YG 2016-2021 Service Manual: Troubleshooting

    Troubleshooting Examples of False-Alarm Occurrence from system characteristics (It’s not a problem) – Characteristics of EM Wave : EM Waves are reflected against all material and especially metal very well. Reflections of EM Waves are varies with the shape of object.

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