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

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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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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

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