Hyundai Elantra (CN7): Cylinder Head Assembly / Cylinder Head Cover

Hyundai Elantra (CN7) 2021-2026 Service Manual / Engine Mechanical System / Cylinder Head Assembly / Cylinder Head Cover

Components and components location

Components

1. Cylinder head cover
2. Engine oil filler cap
3. Breather hose
4. PCV hose
5. Cylinder head cover gasket
6. Oil seal
7. Gasket
8. High pressure fuel pump gasket
9. Cam position sensor

Repair procedures

Removal
1.
Disconnect the battery negative terminal.
2.
Remove the engine cover (A).

3.
Disconnect the breather hoses (A).

4.
Disconnect the wiring connectors and harness clamps and remove the connector brackets around the cylinder head cover.

5.
Remove the high pressure fuel pump.
(Refer to Engine Control / Fuel System - "High Pressure Fuel Pump")
6.
Remove the ignition coil.
(Refer to Engine Electrical System - "Ignition Coil")
7.
Remove the CVVD actuator.
(Refer to Engine Control / Fuel System - "CVVD Acuator")
8.
Remove the cylinder head cover (A) with gasket.

Installation
1.
Install the cylinder head cover.
(1)
Install the new gasket.
   
•
Always use the new inner and outer cylinder head cover gaskets.
(2)
The hardening sealant located on the upper area between timing chain cover and cam carrier should be removed before assembling cylinder head cover.
(3)
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 above

(4)
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.
2.
Install the other parts in the reverse order of removal.

    Repair procedures Removal 1.Disconnect the battery negative terminal.2.Remove the cylinder head cover. (Refer to Cylinder Head Assembly - "Cylinder Head Cover")3.

    Other information:

    Hyundai Elantra (CN7) 2021-2026 Service Manual: Compressor oil

    Repair procedures Oil Specification1.The HFC-134a system requires synthetic (PAG) compressor oil whereas the R-12 system requires mineral compressor oil. The two oils must never be mixed.2.Compressor (PAG) oil varies according to compressor model. Be sure to use oil specified for the model of compressor.

    Hyundai Elantra (CN7) 2021-2026 Service Manual: Repair procedures

    Inspection1.Check for resistance between terminals in each switch position (LH).[LH : Audio + Hands free] Switch Resistance (±5%) SEEK Up430 ΩSEEK Down1.11 kΩMODE2.11 kΩMUTE3.11 kΩVolume (+)4.

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