Cylinder head
1 – oil filler plug; 2 – cylinder head cover; 3 – gasket; 4 – guide plate; 5 – lever; 6 – cracker; 7 – top plate; 8 – spring; 9 – oil deflector cap; 10 – bottom plate; 11 – branch pipe; 12, 17 – guide bushing; 13, 16 – valve seat; 14, 15 – valve; 18, 22 – engine lifting eyes; 19 – cylinder head gasket; 20 – guide pin; 21 – cylinder head
Cylinder head bolt tightening sequence
One of the reasons for removing the cylinder head may be replacing the gasket. Defects in the gasket are indicated by loss of engine power, a decrease in the coolant level with a simultaneous increase in the oil level, as well as the presence of air bubbles in the coolant, which are clearly visible when removing the expansion tank cap with the engine running.
Attention! The cylinder head can only be removed when the engine is cold.
1. Remove the ground wire from the battery.
2. Remove the air filter and disconnect the hoses.
3. On fuel-injected engines, remove the air hose from the fuel distributor and throttle body, then disconnect the wires from the fuel start switch, thermostat, cold start valve, metering device, and the ground wire from the retarder valve. Remove the fuel lines from the cold start valve and fuel distributor, and the hose from the retarder valve.
4. Drain the coolant from the cooling system and remove the hoses from the thermostat.
5. Remove the coolant supply hoses to the carburetor automatic choke control mechanism.
6. On engines with a fuel injection system, remove the crankcase ventilation hoses from the intake manifold and cylinder head cover, as well as the coolant hoses from the injection valve flange and thermostat housing.
7. Remove the carburetor throttle cable, having first disconnected the spring retainer and unscrewed the bracket.
8. Remove the fuel line from the fuel pump.
9. Remove the brake booster hose from the intake manifold.
10. Remove the wires from the coolant temperature sensor, ignition coil and idle air control solenoid valve.
11. In engines with a fuel injection system, remove the wires from the coolant temperature sensor and the ignition distributor.
12. Unscrew the exhaust pipe from the exhaust manifold.
13. Loosen the lower mounting bolts, unscrew the upper generator tension bolt, tilt the generator toward the engine and remove the drive belt.
14. Unscrew the 4 timing belt cover mounting bolts and remove it.
15. On engine models built with 2/82, the timing belt cover is in two pieces. The lower cover can only be removed after the pulley has been removed from the crankshaft.
16. Loosen the timing belt tension roller mounting bolts and use a screwdriver to move the tension roller away from the belt, compressing the spring, and tighten the bolts.
17. Remove the timing belt from the camshaft pulley, holding the pulley from turning with a rod or screwdriver.
Caution! After removing the belt, it is strictly forbidden to turn the crankshaft and camshaft pulleys, as this may cause the pistons to hit the open valves, which will lead to serious damage to the engine.
18. Remove the high-voltage wires from the spark plugs and unscrew the spark plugs.
19. Remove the cylinder head cover.
20. Loosen the cylinder head mounting bolts in the reverse order of tightening (see Fig. Cylinder head mounting bolt tightening sequence).
21. Remove the cylinder head with manifolds.