Table of contents: Removal ↓ Installation ↓
Removal
1. Release the pressure in the fuel system (see Chapter Power and exhaust systems).
2. Disconnect the negative cable from the battery.
Warning! If the car stereo system is equipped with a security code, make sure you have the correct combination to activate the audio system before disconnecting the battery!
3. Label and disconnect the spark plug wires.
4. Remove the ignition distributor (see Chapter Engine electrical equipment).
5. Remove the upper section of the intake manifold (pressure chamber) (See Section Removal and installation the intake manifold).
6. Loosen and slide the mounting clamp, then disconnect the ventilation hose from the cylinder head cover (breather pipe).
7. Disconnect any other hoses and wiring harnesses that interfere with cover removal.
8. Unscrew the mounting bolts and remove the washers installed under their heads.
9. Remove the cylinder head cover.
Note. If the cover is "stuck" and cannot be separated from the cylinder head, carefully tap it around the perimeter with a hammer through a wooden block. In particularly difficult cases, the layer of dried sealant can be cut with a putty knife - under no circumstances try to pry the cover with a lever inserted under its mating surface, since damage to the latter can lead to the development of leaks.
Installation
1. The mating surfaces of the cylinder heads and their covers must be absolutely clean and dry. Using a scraper, remove all traces of old sealant and fragments of the destroyed gasket, then wipe the surfaces with a rag soaked in acetone. The presence of traces of oil on the mating surfaces may lead to the development of leaks.
2. If necessary, run the threads of the mounting bolts with a suitable die, restoring damaged threads and removing rust and traces of old sealant. Use a tap of the appropriate size to run the threaded holes in the head.
3. Fill the groove on the mating surface of the cover with RTV sealant, then place a new sealing gasket on top of the sealant. Allow the sealant to dry slightly and thus fix the gasket to the cover.
4. Carefully press the cover onto the cylinder head and screw in the mounting bolts.
5. Tighten the bolts to the required torque in three or four stages.
6. Further assembly is carried out in the reverse order of dismantling the components.
7. Start the engine and check for signs of developing leaks.