Kia Cadenza: Cylinder Head Assembly / Cylinder Head Cover Repair procedures

Kia Cadenza YG 2016-2025 Service Manual / Engine Mechanical System / Cylinder Head Assembly / Cylinder Head Cover Repair procedures

Removal

[LH]

1.	Remove the Intake manifold. (Refer to Intake And Exhaust System - "Intake Manifold")

2.	Remove the high pressure fuel pump. (Refer to Fuel System - "High Pressure Fuel Pump")

3.	Remove the LH ignition coils. (Refer to Engine Electrical System - "Ignition Coil")

4.	Remove the front engine hanger. (Refer to Engine And Transmission Assembly - "Engine Hanger")

Remove the LH cylinder head cover.

(1)	Remove the LH exhaust CVVT oil control valve cap (A).

(2)

Remove the LH cylinder head cover (B) and gasket.

Cover the cylinder head with a clean woven stuff or vinyl cover to prevent foreign materials from entering.

[RH]

1.	Remove the surge tank. (Refer to Intake And Exhaust System - "Surge Tank")

2.	Remove the RH ignition coils. (Refer to Engine Electrical System - "Ignition Coil")

Remove the RH cylinder head cover.

(1)	Remove the RH exhaust CVVT oil control valve cap (A).

(2)

Remove the RH cylinder head cover (B) and gasket.

Cover the cylinder head with a clean woven stuff or vinyl cover to prevent foreign materials from entering.

Installation

[LH]

Install the LH cylinder head cover.

•	Install the cylinder head cover under the exhaust OCV cap is removed.

•	To prevent engine oil leakage, surely install the exhaust OCV cap after installing the cylinder head cover.

(1)	The hardening sealant located on the upper area between timing chain cover and cylinder head should be removed before assembling cylinder head cover.

(2)

After applying TB 1217H (Hyundai Gray RTV) sealant, it should be assembled within 5 minutes.

Bead width : 2.5mm(0.1in.)

(3)	The firing and/or blow out test should not be performed within 30 minutes after the cylinder head cover was assembled.

(4)

Install the LH cylinder head cover bolts as following method.

Tightening torque :

1st step: 4.9 ~ 5.9N.m (0.5 ~ 0.6kgf.m, 3.6 ~ 4.3lb-ft)

2nd srep: 9.8 ~ 11.8N.m (1.0 ~ 1.2kgf.m, 7.2 ~ 8.7lb-ft)

Do not reuse cylinder head cover gasket.

(5)

Install the LH exhaust CVVT oil control valve cap.

Tightening torque :

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

•	Remove on the exhaust OCV cap, and then install the cylinder head cover.

•	After reinstalling the cylinder head cover, install the exhaust OCV cap. otherwise, it may cause leakage to engine oil through the sealing side of OCV cap.

•	If the seal have been damaged in the removal and installation procedures, replace the exhaust OCV cap with a new one.

2.	Install the other parts reverse order of removal.

[RH]

Install the RH cylinder head cover.

•	Install the cylinder head cover under the exhaust OCV cap is removed.

•	To prevent engine oil leakage, surely install the exhaust OCV cap after installing the cylinder head cover.

(1)	The hardening sealant located on the upper area between timing chain cover and cylinder head should be removed before assembling cylinder head cover.

(2)

After applying TB 1217H (Hyundai Gray RTV) sealant, it should be assembled within 5 minutes.

Bead width : 2.5mm(0.1in.)

(3)	The firing and/or blow out test should not be performed within 30 minutes after the cylinder head cover was assembled.

(4)

Install the RH cylinder head cover bolts as following method.

Tightening torque :

1st step: 4.9 ~ 5.9N.m (0.5 ~ 0.6kgf.m, 3.6 ~ 4.3lb-ft)

2nd srep: 9.8 ~ 11.8N.m (1.0 ~ 1.2kgf.m, 7.2 ~ 8.7lb-ft)

Do not reuse cylinder head cover gasket.

(5)

Install the RH exhaust CVVT oil control valve cap.

Tightening torque :

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

•	Remove on the exhaust OCV cap, and then install the cylinder head cover.

•	After reinstalling the cylinder head cover, install the exhaust OCV cap. otherwise, it may cause leakage to engine oil through the sealing side of OCV cap.

•	If the seal have been damaged in the removal and installation procedures, replace the exhaust OCV cap with a new one.

2.	Install the other parts reverse order of removal.

Valve Clearance Adjustment

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