Drain the fluid from the radiator, cylinder block and heater, for which unscrew the plugs on the left side of the cylinder block and on the lower radiator tank, move the upper heater control lever to the right (they open the heater tap) and remove the plugs from the expansion tank and radiator. In order not to damage the radiator, when unscrewing the drain plug, hold the plug nipple soldered into the radiator with a second key. Unscrew the plug with a socket or open-end wrench so as not to tear off the edges of the plug.
Remove the fan casing, disconnect the coolant supply and outlet hoses from the engine and remove the radiator together with the thermostat and hoses. Remove the air filter, having previously disconnected the hoses from it, removing the cover and filter element. Close the carburetor with a technological plug.
Loosen the nuts securing the muffler inlet pipe to the exhaust manifold, and then remove the gearbox, proceeding as described in Section 2.2 "Transmission". Disconnect the carburetor throttle drive rod and the air damper control cable from the engine, as well as the fuel supply hose and the heater hose.
The TSO-3/379 crossbar is suspended on the hoist1 and sling the engine on the right side by the bracket installed on the front stud of the exhaust manifold, and on the left side - by the hole of the clutch housing. Slightly tighten the chain of the hoist, unscrew the nuts of the pillows and (see fig. 4) of the front engine mount to the front suspension crossmember and remove the engine from the compartment.
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Remove the starter heat shield, starter and hot air intake together with the supply hose. Remove two side brackets with the front engine mount cushions from the cylinder block. Unscrew the clutch mounting bolts and remove it.
The engine is installed on the vehicle in the reverse order of removal. Particular attention is paid to connecting the engine to the gearbox: the drive shaft must fit precisely into the splines of the driven clutch disc.
After installing the engine, fill the cooling system with coolant. To do this, remove the plugs from the expansion tank and radiator and open the heater tap. Pour 9.85 liters of coolant into the radiator and replace the radiator plug. Fill the liquid until it starts to spill out of the radiator neck. Then add the remaining liquid to the expansion tank and close it with the plug. Start the engine and let it idle for 1-2 minutes to remove air locks. After the engine has cooled down, check the coolant level, which should be 3 cm above the "MIN" mark on the expansion tank. If the level is below normal, and there are no signs of leakage in the cooling system, bring the level up to normal.
After connecting the air and throttle valve drives to the carburetor, adjust them as described in Section 1.11 "Engine adjustments". The tension of the generator drive belt is also checked and, if necessary, adjusted.
After installing the engine on the car, carefully check the quality of the installation, idle time, and then check for coolant and fuel leaks in the pipe connections and tighten the connections if necessary. Check whether the electrical equipment wire contacts are reliable and whether the signal lamps on the instrument panel are working correctly.
The CO content in the exhaust gases is checked and adjusted if necessary.
Notes
1. A 405 mm long tube with a central suspension. At one end there is a chain with a hook.