Introduction
This tutorial is done without draining the coolant circuit and starts with the engine cold!
To change the water thermostat on Fiat 500 1.2 MPi 69cv , we must therefore:
- Remove the battery.
- Remove the connector support.
- Disconnect the two hoses connected to the water thermostat.
- Disconnect the water thermostat probe.
- Change the thermostat.
- Put everything back together.
- Purge the cooling circuit.
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Start the tutorial with the engine cold.
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Unscrew the battery clip bolt using the ratchet and 13 socket.
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Install the new water thermostat by tightening the two screws and lightly oiling the thermostat gasket.
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Replace the battery , tighten the clip with the 13 socket and tighten the terminals with the 10 combination wrench.
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Turn on the ignition
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To start up
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Let the car idle
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Open the bleeder screw gradually using the large slotted screwdriver (you will hear air coming out of the circuit). Close the bleeder screw once you hear no more air coming out.
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Top up coolant as the level drops.
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Tip: To see the coolant level correctly, shine a portable light on the reservoir. Repeat the previous steps until the coolant level stabilizes and there is no more air.
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Once the coolant level has stabilized and bleeding is complete at idle, fill the coolant reservoir to the "Max" mark.
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When the temperature gauge is at half the maximum height, gradually accelerate in neutral to warm up the engine until the fan starts to circulate the coolant in the radiator.
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You can be two to check that the level does not fall below the "Min" mark.
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After letting the car rest, with the engine off to reduce the pressure in the cooling circuit, top up and repeat the operation until the coolant is between the "Min" and "Max".
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With this tutorial, you can repair the coolant leak by replacing the original water thermostat with a plastic connection with a water thermostat with a steel connection to make cooling more reliable.
With this tutorial, you can repair the coolant leak by replacing the original water thermostat with a plastic connection with a water thermostat with a steel connection to make cooling more reliable.
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23 Comments
Hello, following the replacement of my carlostat I have problems starting when the car is cold. Does anyone know where the problem could come from? Thank you.
Great this one. thank you
Excellent tutorial. This allowed me to de-dramatize this replacement operation.
This tutorial helped me a lot, thank you!
Hello everyone, thanks for this tutorial. The essentials are there. It is not specified that you have to remove the box containing the battery without having unclipped the cable ties and disconnected the two connectors. I struggled a bit to remove the thermostat plug, the locking clip was underneath. I unscrewed it in order to pass it over it and it was much easier. For the purge I did it with the engine running (nothing happens when stopped). You actually have to repeat several times. Thanks for this tutorial and for everyone's comments. Marc
Well done for this very clear and effective tutorial.
Great tutorial. Was able to replace the thermostat of the Fiat 500 without any problems. It was indeed the plastic tip that was cracking. I struggled a bit to disassemble/reassemble the two parts of the connector because you have to discover that you have to open the gray part of the 1/2 female connector by tilting it
Very good tutorial!
I recommend!
Hello, I don't have a bleeder screw on my 2010 Fiat 500!! Thanks for your help.
Good morning
Thanks for the tutorial that I applied on a fiat panda.
The cooling circuit can be emptied by putting a hose through the filler cap to the bottom of the radiator and sucking (be careful not to suck any in) and opening the bleed screw when the level has dropped a little.
THANKS
Alain
Good morning,
I am desperately looking for the water thermostat sensor, only my model is a 2012 Abarth 500
I have not disassembled but can I hope that the sensor cable of this model is in the same place as on mine? This remains a Fiat 500
Sincerely
Thanks a lot,
This will be useful to me in case the return from the garage where I bought the car does not find the problem because this is already the third time that I have brought the car back to this “two-bit” dealer who cannot find the problem. If it persists, I will start changing the thermostat myself, and I will keep you informed of the outcome.
Thanks again for this tutorial
A big oversight in this tutorial: do we purge without filling in LR?
Think of the amateurs for whom this is not obvious...
Furthermore, the RTA does not give this method of bleeding “engine running”, it is curious. You have to fill with the engine stopped and the purges open, when the liquid flows without bubbles, close the purge screws. Only then do you start by adjusting the level in the jar. Then finally, in fact, you close the jar until the fan starts, and then you adjust the level with the engine cold.
Very good tutorial, thank you very much. Repair carried out successfully.
good explanations very useful
very good tutorial
THANKS
