Renault Laguna III Manual page 1563

Coolant temperature sensor: Removal - Refitting
V4Y
Special tooling required
Mot. 1448 Remote operation pliers for
hose clips.
Tightening torquesm
coolant temperature
sensor
clips for the air filter unit
air outlet pipe and at the
inlet of the throttle valve
IMPORTANT
The circuits are designed to be pressurised, so be
careful at high temperatures (risk of serious burns).
Do not remove the cap from the expansion bottle
while the engine is hot.
Take care when carrying out a repair under the bon-
net, as the radiator fan(s) may start to operate with-
out warning.
Do not open the bleed screw(s) with the engine run-
ning.
WARNING
Prepare for the flow of fluid, and protect the sur-
rounding components.
WARNING
When carrying out a repair that requires a complete
change, it is essential to flush the circuit with clean
water, blast compressed air through the circuit to
drive out the water, fill and bleed the circuit and
then measure the effective protection.
The criteria to be met are:
- protection down to -25˚C ± ± ± ± 2 for cold and temper-
ate countries,
- protection down to -40˚C ± ± ± ± 2 for "extreme cold"
countries.
COOLING
REMOVAL
I - REMOVAL PREPARATION OPERATION
a Position the vehicle on a two-post lift (see Vehicle:
Towing and lifting) (02A, Lifting equipment).
a Remove the front engine cover.
a Undo:
25 N.m
- the clip of the air filter unit air outlet pipe,
- the clip of the throttle valve inlet pipe.
6 N.m
a Disconnect the vacuum pipe from the brake servo.
a Remove the clip from the oil vapour rebreathing pipe
using the tool (Mot. 1448).
a Disconnect the oil vapour rebreathing pipe.
a Remove:
- the air outlet pipe to the air filter unit,
- the engine undertray bolts,
- the engine undertray.
a Drain the cooling system (see 19A, Cooling, Cool-
ing system: Draining - Refilling, page 19A-16) .
II - OPERATION FOR REMOVAL OF PART
CONCERNED
a Disconnect the coolant temperature sensor connec-
tor (1) .
a Remove:
- the coolant temperature sensor,
19A-175
19A
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