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Introduction

Vehicle engine 1.4 HDi 70 hp

  1. 
The thermostat housing is located between the engine and the battery.

Remove the air duct protective cover.

Remove the engine cover by pulling it upwards.
    • The thermostat housing is located between the engine and the battery.

    • Remove the air duct protective cover.

    • Remove the engine cover by pulling it upwards.

  2. 
Remove the battery protective covers.

Disconnect the battery terminals.

Disconnect the battery terminals.
    • Remove the battery protective covers.

    • Disconnect the battery terminals.

  3. 
Disconnect the three connectors from the computer and remove the battery from its housing by the handle.

Remove the air line mounting screw.

Remove the air line.
    • Disconnect the three connectors from the computer and remove the battery from its housing by the handle.

    • Remove the air line mounting screw.

    • Remove the air line.

  4. 
Unclip the cable ties on the box

Remove the air line bracket.

Remove the air line bracket.
    • Unclip the cable ties on the box

    • Remove the air line bracket.

  5. 
Remove the protective partition to access the power steering computer.

Disconnect the second computer.

Use a 10mm wrench for the two fixing screws at the bottom of the case.
    • Remove the protective partition to access the power steering computer.

    • Disconnect the second computer.

    • Use a 10mm wrench for the two fixing screws at the bottom of the case.

  6. 
Remove the battery holder, checking that no cables are still attached to it.

Disconnect the air flow meter connector.

Remove the second part of the air line.
    • Remove the battery holder, checking that no cables are still attached to it.

    • Disconnect the air flow meter connector.

    • Remove the second part of the air line.

  7. 
The box is now accessible. It is fixed to the engine by 4 screws and connected to 3 hoses.

Unplug the thermostat.

Unplug the thermostat.
    • The box is now accessible. It is fixed to the engine by 4 screws and connected to 3 hoses.

    • Unplug the thermostat.

  8. 
Open the coolant reservoir cap.

Loosen the clamp on the lower radiator hose under the vehicle to drain the coolant circuit.

Collect the coolant in a basin.
    • Open the coolant reservoir cap.

    • Loosen the clamp on the lower radiator hose under the vehicle to drain the coolant circuit.

    • Collect the coolant in a basin.

  9. 
Use a pair of pliers in the same way to loosen the clamp on the upper radiator hose.

Press the white tab to disconnect the hose from the heating circuit.

Remove the clamp from the third hose.
    • Use a pair of pliers in the same way to loosen the clamp on the upper radiator hose.

    • Press the white tab to disconnect the hose from the heating circuit.

    • Remove the clamp from the third hose.

  10. 
Remove the 4 screws holding the housing to the engine cylinder head. Use an 8mm socket.

Remove the 4 screws holding the housing to the engine cylinder head. Use an 8mm socket.

Remove the 4 screws holding the housing to the engine cylinder head. Use an 8mm socket.
    • Remove the 4 screws holding the housing to the engine cylinder head. Use an 8mm socket.

  11. 
The origin of the leak is clearly visible.

Clean the gasket surface on the engine block.

Clean the gasket surface on the engine block.
    • The origin of the leak is clearly visible.

    • Clean the gasket surface on the engine block.

  12. 
Compare thermostat housings.

Compare thermostat housings.
    • Compare thermostat housings.

  13. 
Remove the bleeder from the old housing if it is not present on the new one.

Check the gasket.
    • Remove the bleeder from the old housing if it is not present on the new one.

    • Check the gasket.

  14. 
Place the thermostat housing on the engine block and tighten the screws.

Connect the heating circuit hose.

Place the bleeder on the new housing.
    • Place the thermostat housing on the engine block and tighten the screws.

    • Connect the heating circuit hose.

    • Place the bleeder on the new housing.

  15. 
Replace the hose clamps on the hoses connected to the housing. Don't forget the lower radiator hose under the vehicle.

Connect the thermostat.

Connect the thermostat.
    • Replace the hose clamps on the hoses connected to the housing. Don't forget the lower radiator hose under the vehicle.

    • Connect the thermostat.

  16. 
Reposition the second part of the air line on the air box.

Replace the battery holder and all the computer connections. Then the battery.

Replace the battery holder and all the computer connections. Then the battery.
    • Reposition the second part of the air line on the air box.

    • Replace the battery holder and all the computer connections. Then the battery.

  17. 
Perform a coolant circuit bleed.
    • Perform a coolant circuit bleed.

Finish Line

6 other people completed this guide.

hemissi-nizar

Member since: 01/16/2017

21,057 Reputation

88 Guides authored

8 Comments

Where can I buy a bleeder alone?

quentin-pegase - Reply

Thank you. Thanks to this tutorial I was able to change the thermostat on a 206 1.4 hdi from 2007. For me the leak came from one of the four screws being loose. It's easy to do if you take your time. The tightening torque is 10 Nw.

interminator2 - Reply

The bleeder collar broke during recovery from the old housing.

I have the reference “Norma RSS PA66-GF35”

I can't find this reference to replace it.

Do you have any idea how to find it?

pascal.jeunehomme@free.fr - 20/11/2021

pascal.jeunehomme - Reply

What is the purpose of the torx screw that we see in the second photo of step 12? On the old case it is screwed in while on the new part it is present but completely unscrewed.

fr_laporte33 - Reply

This is to support the hose below the thermostat.

interminator2 -

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