The liquid is drained from the radiator, cylinder block and heater, for which the plugs on the left side of the cylinder block and on the lower radiator tank are unscrewed, the upper heater control lever is shifted to the right (they open the heater valve) 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 fitting soldered into the radiator with the second key. The cork is unscrewed with a socket or spanner wrench so as not to rip off the edges of the cork.
Remove the fan cover, disconnect the coolant inlet 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.
Unscrew the nuts securing the exhaust pipe of the mufflers to the exhaust manifold, and then remove the gearbox, proceeding as described in Sect. 2.2 "Transmission". Disconnect from the engine the carburetor throttle actuator rod and the air damper control cable, as well as the fuel supply hose and the heater hose.
Hang on the hoist traverse TSO-3/3791 and sling the engine on the right side for the bracket mounted on the front exhaust manifold mounting stud, and on the left side for the hole for mounting the clutch cover. Lightly tighten the hoist chain, unscrew the nuts securing the pillows and (see fig. 4) front engine mount to the front suspension cross member and remove the engine from the compartment.
Remove the starter heat shield, starter and hot air intake along with the supply hose. Remove from the cylinder block two side brackets with pillows for the front engine mount. Unscrew the clutch mounting bolts and remove it.
Install the engine on the car in the reverse order of removal. Particular attention is paid to connecting the engine to the gearbox: the drive shaft must fit exactly into the splines of the 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 valve. Pour coolant in the amount of 9.85 liters into the radiator and put the radiator cap in place. The liquid is poured until it pours out of the radiator neck. Then add the remaining liquid to the expansion tank and close it with a stopper. Start the engine and let it idle for 1-2 minutes to remove air pockets. After the engine cools down, check the coolant level, which should be 3 cm above the mark "MIN", printed on the expansion tank. If the level is below normal, and there are no signs of leakage in the cooling system, then bring the level to normal.
After connecting the actuators of the air and throttle valves to the carburetor, they are adjusted as described in Sec. 1.11 "Engine settings". Also check and, if necessary, adjust the tension of the alternator drive belt.
Having installed the engine on the car, they carefully check the quality of installation, idle time, and then check for leaks of coolant and fuel in the pipeline connections and, if necessary, tighten the connections. They check whether the contacts of the wires of the electrical equipment are reliable and whether the signal lamps on the instrument panel work correctly.
Check the CO content in the exhaust gases and adjust if necessary.
Notes
1. Pipe length 405 mm with central suspension. At one end is a chain with a hook.