Renault Clio: Brake servo: Check
RIGHT-HAND DRIVE

There is no "RENAULT" tool to check the braking assistance
circuit.
Use a vacuum pump fitted with couplings, part numbers
7701349942 and 7700105874 with hose part
number 8200027352 or 8200376245.
CHECK
I - CHECKING THE SEALS

- When checking the brake servo seal, ensure that there is a perfect seal
between this and the master cylinder (A).
If there is a leak in this area, replace the seal between
the brake servo and the master cylinder (see
37A, Mechanical component controls, Master
cylinder: Removal - Refitting, 37A-2).
The brake servo seals must be checked on the vehicle
with the hydraulic circuit operational.
II - CHECKING THE BRAKE SERVO
- Remove the front engine cover (if fitted to the vehicle).
D4F, and 784

- Remove:
- the bolts (1) from the turbocharger heat shield,
- the turbocharger heat shield (2),
- the oxygen sensor (3) (see Oxygen sensors: Removal
- Refitting) (MR 392, 17B, Petrol injection),
- the bulkhead heat shield clips (4),
- the bulkhead heat shield (5).

D4F, and 784
- Refit:
- the bulkhead heat shield,
- the bulkhead heat shield clips,
- the oxygen sensor (see Oxygen sensors: Removal
- Refitting) (MR 392, 17B, Petrol injection),
- the turbocharger heat shield,
- the turbocharger heat shield bolts.
III - CHECKING THE NON-RETURN VALVE
D4F or F4R or K4J or K4M or M4R
- Disconnect the non-return valve on the inlet manifold
side.
K9K
- Disconnect the non-return valve on the vacuum
pump side.

- Connect a vacuum pump to the end of the non-return
valve.
- Activate the vacuum pump to obtain a vacuum of
500 mbar.
- Check that the vacuum pressure does not drop. If it
does, the non-return valve is pierced. Replace the
valve (see 37A, Mechanical component controls,
Brake servo non-return valve: Removal - Refitting, 37A-26).
D4F or F4R or K4J or K4M or M4R
- Refit the non-return valve on the inlet manifold.
- Refit the front engine cover (if fitted to the vehicle).
IV - CHECKING THE VACUUM PUMP
K9K

- Connect the external vacuum pump to the engine
vacuum pump.
- Start the engine.
- Check the following values:
- 550 mbar in 5 seconds at an engine speed of 700
rpm,
- 700 mbar in 3 seconds and 900 mbar in 5 seconds
at an engine speed of 4050 rpm.
- Replace the vacuum pump if the values are different
(see 37A, Mechanical component controls, Vacuum
pump: Removal - Refitting, 37A-68).
- Refit the non-return valve to the vacuum pump.
READ NEXT:
LEFT-HAND DRIVE
WARNING
Prepare for the flow of fluid, and protect the surrounding
components.
REMOVAL
I - REMOVAL PREPARATION OPERATION
Position the vehicle on a two-post lift (see Vehicle:
Towin
LEFT-HAND DRIVE
WARNING
Prepare for brake fluid outflow, to prevent damage
to the mechanical parts and bodywork around the
braking system.
REMOVAL
I - REMOVAL PREPARATION OPERATION
Position the veh
SEE MORE:
Side lights/brake and direction
indicator lights
Open the boot lid and remove screws 1.
The bulbs are under pressure
and can break when
replaced.
Risk of injury.
To release the light unit, start by moving
the exterior edge away to a sufficient
extent (movement A) t
REMOVAL
I - REMOVAL PREPARATION OPERATION
Lock the airbag computer using the Diagnostic tool
(see Fault finding - Replacement of components)
(MR 394, 88C, Airbags and pretensioners).
Disconnect the battery (see Battery: Removal - Refitting)
(MR 392, 80A, Battery).
Remove the centre console (
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