UAZ -374195 Operation Manual page 60

CLEAN
AIR
1 — main ventilation circuit; 2 — receiver 3 — short ventilation circuit; 4 — valve cap;
5 — oil baffle; 6 — crankcase gases deflector; 7 — inlet pipe; 8 — throttle pipe
TOSOl-A40M, OZh-40 lena or OZh-40 TOSOl-TS low-freezing
fluids are used as coolants.
TOSOl-A65M, OZh-65 lena or OZh-65 TOSOl-TS low-freezing
fluids are used as coolants at the ambient air temperature below minus 40°С.
The coolant operating temperature shall be within 80°–105°С.
A short-time (maximum of 5 minutes) engine run is allowed at the
cooling fluid temperature rise to 109°С.
If the coolant overheat warning lamp lights up, identify and
eliminate the reason causing overheating immediately.
Check the coolant level periodically in expansion tank 12 (Fig. 3.11).
The fluid level shall be 3-4 cm above the mark "min" in tank 12. Since
the cooling fluid has high thermal expansion coefficient and the cooling
fluid level in the expansion tank varies significantly depending on the
temperature, check the level when the system temperature is plus 15-20°С.
In case of the cooling fluid decreases in the expansion tank within a
short period time or after moderate mileages (up to 500 km), check the
cooling system tightness and after elimination of leaks, add the same
cooling fluid into the cooler or the expansion tank.
Every three years or after every 60,000 km (depending on which
happens first) purge the cooling system and refill the coolant.
The cooling system shall be flushed as follows:
- fill the system with pure water, start the engine, let it work for warming
up, shut the engine down and drain water;
- repeat the above operation.
CRANKCASE GASES AND
CLEAN AIR MIXTURE
Fig. 9.4. Engine housing ventilation diagram:
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