Dacia Pick-Up 1304/1305/1307. Instruction - page 45
19
COOLING - EXHAUST - FUEL TANK
19 - 9
NOTE: The GMV thermocouple may not be repaired ;I t is located on the radiator.
The G.M.V. thermocouple is located on the lateral right side of the radiator, attached on this.
The tightening moment is 5 daNm.
It has a double purpose:
- it controls the engine cooling G.M.V. starting ,by means of a relay, when the temperature
of the cooling fluid reaches to 95° C ( stage I ) and its stopping, when the temperature is
lowering under 90° C.
- it controls the uncoupling of the AC compressor if the cooling fluid temperature reaches until
to 105° C ( stage II )and permits its coupling when the temperature is lowering under 100° C.
The thermocouple operation is performed in two stages of temperature, as follow:
- stage I ( between the posts B and A) - coupling at 95° C and uncoupling at 90° C.
- stage II ( between the posts ( B and C )- coupling at 105° C and uncoupling at 100° C.
In order to check the correct operation of the thermocouple, there are necessary the followings:
- a battery (1);
- a cooling fluid vessel (2);
- a thermometer for fluids between 0 – 200° C (3);
- a control lamp (4);
- a heat source.
Make an assembly according to the a.m. diagram.
Heat the fluid in the vessel.
When the liquid temperature reaches to 95 C the lamp , connected between the posts B and
A of the thermocouple should light up and shall remain so, until the temperature is lowering under
90° C.
If the lamp does not light up at the coupling temperature or it remains lit also after the temperature
lowering, under the uncoupling temperature, replace the thermocouple.
Then connect
the lamp at the posts B and C of thermocouple ; it should light up when the cooling fluid reaches
to 105° C and it remains lit until the temperature is lowering under 100° C. Contrary, replace the
thermocouple.
1
4
2
3
COOLING G.M.V. THERMOCOUPLE CHECKING
( for Pick-Up with C.A. )
COOLING - EXHAUST - FUEL TANK
19
19 - 10
Disconnect the battery.
Drain the cooling circuit and recover the
cooling fluid.
Dismount :
- the hoses connected to the pump;
- the fan belt;
- the fan and the water pump pulley.
Unscrew the fixing screws of the pump
and dismount the pump by tapping it with
a plastic hammer.
The water pump is not to be repaired.
D
ISMO UNTING
Clean the contact surface of the
gasket and mount a new gasket on the
pump.
Mount the water pump pulley and the
fan.
Mount the hoses and tighten the collars.
Mount the belt and adjust the tightness;
maximum sag of 7,5 mm at a pushing
force of about 3 daNm.The belt shall not
be overtightened so that pump and
alternator bearings are not forced.
Connect the battery.
Perform the filling and aeration of the
cooling circuit.
R
EMOUNTING
WATER PUMP
19
COOLING - EXHAUST - FUEL TANK
19 - 11
D
ISMO UNTING
Disconnect the battery.
Drain the cooling circuit.
Dismount : the pump belt,the fan and the water pump pulley.
Unscrew the fixing screws of the cover and take out the cover by slightly tapping it
with a plastic hammer.
R
EMOUNTING
Clean the contact surface of the gasket and mount the cover with a new gasket.
Mount the water pump pulley and the fan.
Connect the battery.
Perform the filling and aeration of the cooling circuit.
WATER PUMP COVER
COOLING - EXHAUST - FUEL TANK
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19 - 12
CHECKING OF THE THERMOSTAT OPERATION
Pour in a vessel a convenient quantity of cooling fluid.
Check the fluid temperature by means of a thermometer.
The opening temperature is :
T
HERMOSTAT
O
PENING
TEMPERATURA
B
O RE
( mm )
O
PENING
START
(
0
)
O
PENING
END
(
0
)
Warm countries
76
87
7
Cold and
87
100
7,5
temperate countries
D
ISMO UNTING
Loosen the tightening ring and dismount the pump hose
Loosen the tightening ring of the thermostat and dismount the thermostat.
R
EMOUNTING
Mount the thermostat in the hose and tighten the fixing ring.The thermostat is placed in
the hose with the cylindrical part.
Mount the hose on the pump and tighten the fixing ring.
Perform the filling the aeration of the cooling circuit.
THERMOSTAT