1B-2 Mechanical (4HK1) Cylinder head cover removal 1. Ventilation hose disconnect 1. Remove the air leak pipe from the EGR cooler and bracket. Note The existence or nonexistence of the equipment varies depending on the machine manufacturer. 2. Remove the bracket from the cylinder head cover. 3. Disconnect the oil level gauge guide tube from the cylinder head cover. 4. Disconnect the ventilation hose from the air breather. 1. Cylinder head cover 2. Gasket 3. Lower cover 1. Air leak pipe 2. Oil level gauge guide tube 3. Ventilation hose 4. Bracket 2. Cylinder head cover removal 1. Remove the cylinder head cover from the lower cover. 2. Remove the head cover gasket from the cylinder head cover.