2. Remove the air filter (see Chapter 4).
3. Disconnect the high-voltage wires from the spark plugs and the wiring bracket from the valve cover.
Note: On DOHC engines, remove the center cover to access the spark plugs.
4. Clearly mark and disconnect any hoses and wires that are connected to or pass over the valve cover.
5. Unscrew the valve cover bolts and remove the cover. If the cover is stuck to the cylinder head, tap it with a soft hammer or a wooden block.
3.5a. Remove the valve cover bolts (arrows) - 2.0L engine shown
3.5b. Exploded view of the SOHC engine valve cover, valve rocker arms and camshaft. 1. Toothed belt; 2. Camshaft sprocket; 3. Camshaft seal; 4. Semi-circular seal; 5. Camshaft; 6. Valve rocker assembly; 7. PCV hose; 8. Ventilation hose; 9. Cable clamp; 10. Valve cover
3.5s. Exploded view of the DOHC engine valve cover, valve rocker arms and camshafts.1. Toothed belt; 2. Camshaft sprocket (intake); 3. Camshaft sprocket (exhaust); 4. Camshaft seal; 5. Camshaft bearing caps; 6. Camshaft bearing cap; 7. Camshaft (intake); 8. Camshaft (exhaust); 9. Camshaft bearing cap; 10. Camshaft bearing cap; 11. Semicircular seal; 12. Ventilation hose.
6. Clean the valve cover completely and remove all traces of the old gasket.
7. Install a new gasket onto the cover, securing it in place with sealant. Place the cover on the engine and insert the bolts.
Note: Install a new semi-circular seal into the cylinder head. Apply a small amount of sealant to the lower surface of the seal, and after installing the seal, apply a small amount of sealant to its upper surface.
8. Tighten the bolts to the torque specified in the specifications in this chapter. The rest of the procedure is carried out in the reverse order of disassembly. When finished, start the engine and check for leaks.