Hyundai Tucson: Cylinder Head Assembly- Installation

Hyundai Tucson - Fourth generation (NX4) - (2020-2023) - Workshop Manual / Engine Mechanical System / Cylinder Head Assembly / Cylinder Head Assembly- Installation

  1. The hardening sealant located on the upper area between timing chain cover and cam carrier, cylinder head cover should be removed before assembling cylinder head cover.
  2. Install the cylinder head cover.

(1) Install the new gasket.


Always use the new inner and outer cylinder head cover gaskets.

(2) Apply liquid gasket sealant to the marked area of the cam carrier and assemble within 5 minutes of application.

Width : 2.0 - 3.0 mm (0.0787 - 0.1181 in.)

Specification : MS721-40AA or AAO

(3) Install the cylinder head cover (A) by tightening the bolts, in several

(3) Install the cylinder head cover (A) by tightening the bolts, in several passes, in the sequence as shown.

Tightening torque

Step 1 : 3.9 - 5.9 N.m (0.4 - 0.6 kgf.m, 2.9 - 4.3 lb-ft)

Step 2 : 7.8 - 9.8 N.m (0.8 - 1.0 kgf.m, 5.8 - 7.2 lb-ft)



The firing and/or blow out test should not be performed within 30 minutes of assembling the cylinder head cover.

  1. Install the other parts in the reverse order of removal.


     Cylinder head cover

    Removal Disconnect the battery negative terminal. Remove the cylinder head cover. (Refer to Cylinder Head Assembly - "Cylinder Head Cover") Turn the crankshaft damper pulley so that No. 1 piston is at top dead center. (1)

     When Using the CVVD fixture/ When not using the CVVD fixture

    When Using the CVVD fixture (1) Install the CVVD fixture (A) over the CVVD assembly. (2) Remove the CVVD assembly. When not using the CVVD fixture (3) Remove the CVVD assembly. Remove the Intake CVVT (A). Remove the

     Camshaft - Inspection

    Measure the height of the cam. Check the surface of the cam lob for wear and tear. If necessary, replace the camshaft. Cam height Intake : 37.33 mm (1.4697 in.) Exhaust : 37.44 mm (1.474 in.) Inspect the camshaft journal clearance.


     Climate control additional features

    Auto Defogging System on Models with Automatic Temperature Control Auto defogging helps reduce the possibility of fogging up the inside of the windshield by automatically sensing the moisture on inside the windshield. The auto defogging sy

     Pressure Side Impact Sensor (P-SIS)

    Disconnect the batteiy negative terminal. WARNING After disconnecting the cables, wait at least 3 minutes. Remove the front door trim. (Refer to Body - "Front Door Trim") Disconnect the connector (A) from the pressure side im