cooling RENAULT SCENIC 2000 J64 / 1.G Technical Note 3426A User Guide

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Diagram
19
19-2
Diagram
1 Engine
2 Radiator
3 "Hot" container with degassing after thermostat
4 Heater matrix
5 Thermostat mounting
6 Thermoplunger mounting (if fitted)7 3 mm ∅ restriction
8 6 mm ∅ restriction
9 Oil/water exchanger
10 Water pump
11 Thermostat
12 Bleed screw
The expansion bottle valve rating is 1.2 bar
(colour: brown).

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Thermal plunger unit
19
19-3
Thermal plunger unit
REMOVAL
Put the vehicle on a 2 post lift.
Disconnect the battery.
Remove the engine undertray.
Position the hose clips at the inlet and outlet of the
thermal plunger mounting unit (plugs).
Disconnect the hoses on this unit.
Remove the mounting bolt for the thermal plunger
support unit as well as the supply wires and remove
the unit.
REFITTING
The plugs are tightened in the usual fashion.
Refitting is the reverse of removal.
Top up the coolant and bleed the cooling circuit (see
section 19 "Filling - bleeding"). SPECIAL TOOLING REQUIRED
Mot. 453 -01
Mot. 1202
Mot. 1448Hose clamp pliers set
Hose clip pliers
Long nose pliers for hose clips
TIGHTENING TORQUES (in daN.m)
Thermal plungers 2

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Radiator
19
19-4
Radiator
REMOVAL
Put the vehicle on a two post lift.
Disconnect the battery.
Remove the engine undertray.
Drain the cooling circuit through the lower radiator
hose.
Disconnect the wiring of the fan unit.
Unclip the power steering reservoir and remove it.
Remove:
– the upper cross member,
– the upper radiator mountings,
– the upper hoses on the radiator,
– the inlet manifold-air exchanger duct,
– the fan unit mountings on the radiator and remove
the fan,
– the radiator mountings on the condenser and remove
the radiator.REFITTING
Refitting is the reverse of removal.
Fill and bleed the cooling circuit (see section 19
"Filling and bleeding").
NOTE: ensure that the fins of the radiator or of the
condenser (if fitted) are not damaged when
removing-refitting, and protect them if necessary. SPECIAL TOOLING REQUIRED
Mot. 1202 -01
Hose clip pliers
Mot. 1202 -02
Mot. 1448 Long nose pliers for hose clips

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Water pump
19
19-5
Water pump
REMOVAL
Put the vehicle on a two post lift.
Disconnect the battery.
Remove the engine undertray.
Drain the cooling circuit through the lower radiator
hose.
Unclip the diesel filter and remove it.
Remove:
– the front right wheel along with the mudguard,
– the style cover,
– the accessories belt (see Section 07 "Accessories
belt tension"),
– the coolant pump and power assisted steering pump
pulleys,
– the water pump.Cleaning
It is very important not to scratch the gasket faces.
Use the Décapjoint product to dissolve any part of the
gasket which remains attached.
Wear gloves whilst carrying out the following
operation.
– Apply the product to the parts to be cleaned; wait
about ten minutes, then remove it using a wooden
spatula.
Do not allow this agent to drip on to the paintwork.
REFITTING
Refit:
– the water pump (fitted with a new gasket), tightening
the bolts to a torque of 1.7 daN.m,
– the accessories belt and tension it (see section 07
"Accessories belt tension").
Fill and bleed the cooling circuit, (see section 19
"Filling and Bleeding"). SPECIAL TOOLING REQUIRED
Mot. 1202 -01
Hose clip pliers
Mot. 1202 -02
Mot. 1448 Long nose pliers for hose clips
TIGHTENING TORQUES (in daN.m)
Water pump bolts 1.7

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Compressor
62
62-2
SCENIC Compressor
REMOVAL
Drain the R134a refrigerant circuit (refer to the
procedure described in the "Air conditioning" manual).
Disconnect the battery.
Remove:
– the cooling assembly (see section 19 ),
– the alternator (see section 16),
– the R134a refrigerant pipes retaining bolt,
– the four compressor mounting bolts.REFITTING
Refitting is the reverse of removal.
Tighten the R134a refrigerant pipes retaining bolt on
the compressor to 3 daN.m.
Fill the R134a refrigerant circuit using the filling
equipment.
IMPORTANT:
When replacing the existing compressor with a new
compressor, it is essential to drain some of the oil from
the new compressor, so that the amount of oil in the
new compressor corresponds to the amount of oil
drained from the oil compressor.
99211S
Oil drained
new
compressor=Oil
in the new
compressor-Oil remaining
in the old
compressor