Renault Laguna III Manual page 1501

Water chamber: Removal - Refitting
V4Y
Special tooling required
Mot. 1448 Remote operation pliers for
hose clips.
Tightening torquesm
water chamber nuts
rigid cooling pipe bolt
rigid cooling pipe bolts
clip on the throttle valve
air inlet pipe
air filter unit air outlet
pipe clip
IMPORTANT
When working in the engine compartment, take
care as the radiator fan(s) may start up unexpect-
edly (risk of being cut).
To avoid any risk of serious burns when the engine
is hot:
- do not open the expansion bottle cap,
- do not drain the cooling system,
- do not open the bleed screw(s).
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.
WARNING
Prepare for the flow of fluid, and protect the sur-
rounding components.
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,
10 N.m
- the clip of the throttle valve air inlet pipe.
10 N.m
a Disconnect the vacuum pipe from the brake servo.
a Separate the clip on the oil vapour rebreathing hose
6 N.m
using the tool (Mot. 1448).
a Disconnect the oil vapour rebreathing hose.
6 N.m
a Remove:
- the air outlet pipe of 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) .
a Separate the clip (1) on the cooling hose between
the water chamber and the cooling radiator using the
tool (Mot. 1448).
a Disconnect the cooling hose.
a Remove the coolant temperature sensor (see 19A,
Cooling, Coolant temperature sensor: Removal -
Refitting, page 19A-167) .
19A-113
19A
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