You will need a torque wrench to get the job done.
Removing
1. We install the car on a viewing hole or overpass (see "Vehicle preparation for maintenance and repair").
2. For the convenience of work, remove the battery (see "Battery - removal and installation").
3. Drain the coolant (see "Coolant - level check and replacement").
4. Disconnect the wire tip from the coolant temperature indicator sensor (see "Coolant temperature gauge sensor - replacement").
5. Remove the exhaust pipe from the exhaust manifold studs (see "Downpipe - removal and installation").
6. Remove the air filter housing (see "Air filter housing - removal and installation").
7. Disconnect the air damper drive rod, fuel hose, EPHH hose, crankcase ventilation, vacuum ignition timing controller and wire blocks from the carburetor (see "Carburetor - removal and installation").
8. Set the piston of the 4th cylinder to the BMT position of the compression stroke (see "Clearance between valve levers and camshaft lobes - adjustment").
9. Remove the housing assembly with the camshaft. We mark the position of the valve drive levers and remove the levers with springs (see "Camshaft and valve levers - replacement").
10. We tie the chain with wire and pass it through the window in the cylinder head.
11. Remove the ignition distributor (see "Ignition distributor - removal and installation") with high voltage wires.
12. We turn out the spark plugs from the cylinder head (see "Spark plugs - condition check and replacement").
13. Remove the warm air intake (see "Gaskets of the intake pipeline and exhaust manifold of the carburetor engine - replacement").
14. We unscrew the nut of the upper fastening of the heat shield of the starter (see "Starter - removal and installation").
15. Remove the tip from the exhaust manifold stud "mass" wires (see "Gaskets of the intake pipeline and exhaust manifold of the carburetor engine - replacement").
16. Disconnect the heating hose from the inlet pipe fitting.
17. Disconnect the hoses of the vacuum brake booster and EPHH from the inlet pipe fittings.
18. After loosening the clamps, remove the thermostat bypass hose and the radiator inlet hose.
19. After loosening the clamp, remove the hose for supplying coolant to the heater radiator from the pipe.
20. socket wrench by 12 mm with an extension, unscrew the ten bolts of the internal fastening of the head to the cylinder block.
21. socket wrench by 13 mm unscrew the bolt of the external fastening of the head to the cylinder block.
22. Remove the cylinder head along with the intake manifold, exhaust manifold and carburetor.
23. Remove the gasket from the two centering bushings of the cylinder block.
Installation
1. Install a new gasket and cylinder head in reverse order, passing a wire with a chain through their windows.
2. We check the coincidence of the previously applied marks.
3. Before installing the cylinder head, it is necessary to lubricate the bolts of its fastening with engine oil in advance and allow excess oil to drain, holding the bolts for at least 30 minutes.
Attention! The cylinder head bolts may only be reused if they have extended to a length of no more than 115.5 mm.
For longer lengths, the bolt must be replaced.
4. Tighten the block head bolts in four stages:
- pre-tighten ten bolts of the internal fastening of the head with a torque of 20 N·m;
- we tighten them with a moment of 69.4-85.7 N·m.
- we tighten the bolts by 90°;
- turn the screws 90°again.
Tighten the outer bolt last (11) moment 30.6-39.1 N·m.
The order of tightening the cylinder head bolts
5. We install the housing with the camshaft on the cylinder head studs and evenly tighten the fastening nuts (see "Camshaft and valve levers - replacement").
6. We untie the wire, install the sprocket with the chain on the camshaft, wrap the fastening bolt and counter it by bending the tab of the lock washer.
7. "We charge" chain tensioner and, having installed it in its original place, "unloading" (see "Timing chain tensioner - replacement") and adjust chain tension (see "Timing chain - replacement").
8. Adjust the gap between the levers and camshaft cams (see "Clearance between valve levers and camshaft lobes - adjustment").
9. Adjust the tension of the generator drive belt (see "Alternator drive belt - tension adjustment and replacement").
10. Install the ignition distributor by directing the slider contact to the high-voltage terminal of the 4th cylinder (see "Ignition distributor - removal and installation"). Check and, if necessary, correct the ignition timing (see "Ignition timing - check and adjustment").
11. Installation of the removed parts is carried out in the reverse order.
12. Fill the system with coolant (see "Coolant - level check and replacement").