UAZ 3303 - Before the Winter Season of Operation; Engine

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4. Switch on the windshield wiper for 15-20 min; the blades
should be swung out of the way.
Before the Winter Season of Operation
1. Disconnect the air hose from the air cleaner union and set
the manifold heat control valve in the "winter" position.
2. Wash the fuel tanks and fuel filters.
3. Check coolant specific gravity in the engine cooling
system, and if required, fill up to normal.
4. Flush the cooling system once in three years or after 60 000
km of run, drain coolant and refill the cooling system with fresh
coolant.
5. Check the heating and body ventilation system for proper
functioning.
6. Check the shutters for proper functioning.
7. Flush or replace the air cleaner of the vacuum brake
booster.
8. Switch on the windshield wiper for 15-20 min; the blades
should be swung out of the way.
ENGINE
The automobile is equipped with the four-cylinder engine
with upper valve arrangement which is shown in Fig. 16, 17.
Check and, if required, tighten the engine mounting
(Fig. 18). Tighten the engine mounting bolt nuts until distance
sleeves touch the washers.
Tighten the cylinder head fastening nuts after completion of
the automobile running-in period and every 1 000 km of run
each time when removing the cylinder head.
Tighten the nuts only on a cold engine. Tighten the nuts in
two steps in the sequence illustrated in Fig. 19: the first step -
preliminarily with a less force, the second one - finally; the final
tightening torque should be equal to 90-94 Nm (9.0 -
9.4 kgfm).
As required, clean carbon deposit off the cylinder head,
piston crowns and inlet valves.
Valve gear. Adjust the valve-to-rocker clearances on a cold
engine using the following sequence: