Engine Mechanical System
Cylinder Head Cover Repair Procedures
In this manual: Engine Mechanical System
11steps
~66min
3/5difficulty
Done 0 of 11
Removal
- Remove the engine cover.
- Disconnect the negative battery cable.
- Remove the air cleaner hose. (Refer to Intake and Exhaust System - "Air Cleaner")
- Disconnect the engine wiring connector and the cable clip, then remove the cylinder head protector and the wiring from the engine.


- Disconnect the exhaust valve OCV (Oil Control Valve) connector. (Refer to Fuel System - "CVVT Oil Control Valve")
- Disconnect the ignition coil. (Refer to Engine Electrical System - "Ignition Coil")
- Remove the PCV (Positive Crankcase Ventilation) hose (A).

- Remove the high pressure fuel pump. (Refer to Fuel System - "High Pressure Fuel Pump")
- Remove the cylinder head cover (A) and gasket (B).

Loosen the cylinder head cover bolts in the order and steps shown.

Installation
- Install the cylinder head cover.
- Before assembly, remove the hardened sealant located on the upper mating surface between the timing chain cover and the cylinder head cover.
- Assemble within 5 minutes after applying sealant.
Bead width: 2.0 ~ 3.0 mm (0.07 ~ 0.11 in.) Sealant: THREEBOND 5900H (LOCTITE 5900H)

- Install the cylinder head cover (A) with a new gasket (B).

Do not reuse the removed gasket.
- Tighten the cylinder head cover bolts in the order and sequence shown. Tightening torque: Step 1: 3.9 ~ 5.9 N·m Step 2: 7.8 ~ 9.8 N·m

- Install in the reverse order of removal.
Test yourself
A quick Hyundai Sonata LF quiz: every answer comes with an explanation and a link to the manual page.
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