UAZ UAZ-31512, Инструкция по эксплуатации

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Drain coolant from the cooling system through two cocks. One
of them is arranged on the radiator lower reservoir, the other on
the cylinder block. When draining the coolant, remove the
radiator cap and open the cock.
Notes.
1. On some automobiles, the engines 4178 are installed, with
feeding coolant to cylinder head completed with the pump of the
cooling system in which design the ball bearings are applied.
2 . On some automobiles, the visco coupling of the fan drive is
installed, its purpose is to reduce fuel consumption, fan noise.It also
reduces the time required for cold engine warm up and maintains the
engine efficient operating condition. Keep the outer surface of the
coupling clean.
Maintenance of the Ignition System (Fig. 39)
If the transistor switch or the coil of the magnetic pulse
distributor stator failed en route, change over to operation with
the emergency vibrator for which purpose, disconnect the wire
from the terminal K3 of the transistor switch and connect it to
the terminal of the emergency vibrator.
Service life of the emergency vibrator is limited to 30 h,
therefore switch it into operation only in emergency cases and
replace a faulty unit at the first opportunity.
Simultaneously, when switching into emergency operation,
switch off the system of idling-speed economizer for which
purpose, connect by means of one of the hoses unions 1 and 2
(Fig. 40) of the carburettor between themselves missing the
electromagnetic valve. Otherwise, the engine could be stopped
when the throttle pedal is released fully.
After restoring the contactless ignition system (replacing of
the magnetic pulse distributor or transistor switch), restore the
previous connections of the carburettor.
Maintenance of the system consists in setting the ignition
timing, regularly cleaning the rotor and cover of the magnetic
pulse distributor, high-voltage part of the ignition coil and spark
plugs, in timely lubricating the magnetic pulse distributor. and
checking spark gap.
Check spark plug gap with a feeler gauge (Fig. 41). The gap
should be equal to 0.8
+0.15
mm. Adjust the gap by bending the
side electrode.