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Introduction

This tutorial shows you the steps to change the water temperature sensor on your Peugeot. The model presented in the tutorial is a 306 1.8 16v phase 3. Changing a sensor involves bleeding the cooling circuit. On my model, 5.5 liters of coolant are required. You will not need any specific tool for bleeding, just a container to collect the used liquid and a plastic bottle (1.5L or 2L) which will be used when filling.

  1. 
Lift the hood.

The probe is located on the thermostat housing.

Removing the air filter housing is not mandatory but it makes it easier to disassemble the sensor.
    • Lift the hood.

    • The probe is located on the thermostat housing.

    • Removing the air filter housing is not mandatory but it makes it easier to disassemble the sensor.

    • Disconnect the negative terminal of the battery.

    • Loosen the 2 clamps and the nut behind them.

    • Remove the air filter housing.

  2. 
This manipulation must be carried out with the engine cold.

Open the cooling circuit filler cap.
    • This manipulation must be carried out with the engine cold.

    • Open the cooling circuit filler cap.

    • Locate the bleeder plug at the bottom of the circuit.

  3. 
The bleeder screws are located on the thermostat housing, on one of the hoses that goes to the heater core, and on the top of the radiator next to the air intake.

Place the drain pan under the drain plug.

Drain by opening the drain plug a quarter turn.
    • The bleeder screws are located on the thermostat housing, on one of the hoses that goes to the heater core, and on the top of the radiator next to the air intake.

    • Place the drain pan under the drain plug.

    • Drain by opening the drain plug a quarter turn.

    • Open the bleeder screws to completely bleed the circuit.

  4. 
To disconnect it, simply press on the clip that holds the connector to the probe.

To disconnect it, simply press on the clip that holds the connector to the probe.

To disconnect it, simply press on the clip that holds the connector to the probe.
    • To disconnect it, simply press on the clip that holds the connector to the probe.

  5. 
Unscrew the faulty probe and replace it with the new one.

Reconnect the electrical connector.
    • Unscrew the faulty probe and replace it with the new one.

    • Reconnect the electrical connector.

  6. 
Since the bleeders are located higher than the maximum level of the tank, you must take a plastic bottle, cut off the bottom and insert it into the tank opening.
    • Since the bleeders are located higher than the maximum level of the tank, you must take a plastic bottle, cut off the bottom and insert it into the tank opening.

    • Make sure that once the bottle is in the tank there are no leaks.

    • Fill the reservoir and bottle until the fluid level is higher than the highest bleeder. You should see air bubbles escaping through the bottle and bleeders.

    • Since the expansion tank will be full and fluid will drain out of the overflow under the right front fog light, remember to place the drain pan there against the wheel.

    • As soon as liquid flows continuously over a bleeder, close it.

    • Start the engine to let the last air bubbles escape and to open the thermostat. The level will drop, top up gradually until there are no more air bubbles.

    • Remove the bottle and close with the cap.

    • Let the temperature rise until the fan starts. Wait for the fan to stop and then wait for the engine to cool. When the engine is cold, check the level and top up or remove the excess.

Conclusion

Remember to take specific Peugeot coolant and in sufficient quantity (2x4 liters)

3 other people completed this guide.

laurent.immo13003

Member since: 03/03/2016

12,942 Reputation

155 Guides authored

One Comment

Hello, what are the other two probes please?

max marmonnier - Reply

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