Vaz 21213, Руководство по ремонту, Страница: 38 / 222

Gradually heat the water from the starting 73-75 ° ë in incre-
ments of approximately 1 ° ë per minute, at constant agitation to
ensure homogeneous heating within the container.
The value, when the valve travel is 0.1 mm, is deemed as the
initial temperature of the main valve opening.
The main valve opening temperature is stated on the ther-
mostat face side and is (80±2) ° ë or (83±2) ° ë. The thermostat is
subject to renewal when its main valve opening temperature dif-
fers from the value stated on the thermostat face or when the
main valve stroke is below 6.0 mm.
The easiest way to check the thermostat is serviceable, is to
touch it directly in the vehicle. The thermostat is good when after
the engine cold start, the lower radiator pipe gets warmer as soon
as the coolant temperature reaches 80-85°C (the coolant tem-
perature gauge needle is 3-4 mm from the red area of the scale).
Radiator
Removal.
Withdraw the radiator from the vehicle in the fol-
lowing order:
- remove the spare wheel and its supporting tube;
- drain the fluid from the radiator and cylinder block through
the respective caps in the left-hand fluid cooler and cylinder block;
open the heater drain tap and remove the radiator filler cap;
- disconnect the hoses from the radiator;
- separate the fan cowl halves and withdraw the fan cowl;
- undo two bolts holding the radiator to the body, release the
upper catch of the radiator cowling upwards, move the radiator
top towards the engine and withdraw the radiator from the engine
compartment;
- take out the radiator cowling.
Radiator leak test. The radiator tightness is checked in a
container full of water.
Plug the radiator pipes, apply air at pressure of 0.2 åPa (2
kgf/Òm
2
) and immerse the radiator into the water for at least 30
seconds. The radiator should show no air bubbles.
Repair or renew the radiator when it is found leaky or dam-
aged.
Radiator repair. In the event the aluminium tubes are dam-
aged, dismantle the radiator, drill the defective tubes from both
ends to a depth of 25-30 mm, using a drill of 8.5 mm diameter.
Fit the undersize tubes (flared at one end) of 7.3 mm diame-
ter and 0.5 mm wall thickness into the defective tubes. Then on a
special stand push the tubes all the length down using a steel
core of 7.5±0.05 mm.
On the respective bench expand each tube from both ends
simultaneously.
Assemble the radiator and check it for tightness.
Lubrication system
Refer to Fig.2-67.
Engine oil change
Change oil only when the engine is hot. Allow at least 10 min-
utes, after the drain plug is removed, for all the oil to drain.
Oil renewal should be accompanied by the oil filter removal;
use tool Ä.60312 (Fig.2-4) to undo the filter. When refitting, screw
the filter into position on the engine and tighten the filter by hand
only - do not use any tools.
Change oil in the following order:
- stop the engine, drain the oil and without removing the oil fil-
ter, pour cleaner oil to the «MIN» mark of the oil dipstick (2.9 litre).
Use oil equivalent to grades Ççààçè-îÑ, åëè-1 or åèí-2å;
- start the engine and run it for 10 minutes at low rpm;
- completely drain the cleaner oil and discard the old oil filter;
- fit a new oil filter and pour oil of respective season grade.
Oil pump
The basic dimensions of the pump components and its link-
age are shown in Fig.2-68.
38
Fig.2-66. Thermostat:
1 - intake manifold (engine side); 2 - relief valve; 3 - relief valve spring; 4 - shell;
5 - rubber insert; 6 - exhaust manifold; 7 - main valve spring; 8 - main valve seat;
9 - main valve; 10 - retainer; 11 - adjuster nut; 12 - piston; 13 - sleeve;
D - coolant inflow from engine; ê - coolant inflow from radiator;
ç - coolant outflow to pump