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How do you flush the coolant of the Renault Megane III?

Model: Renault Megane Megane III, Megane 3 - Years: 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015
Part: Antifreeze coolant

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Video tutorial

In this video, we will see how to bleed the cooling liquid of the Renault Megane III: we open the hood, then disconnect the battery by disconnecting the negative terminal. It is advisable to raise the front of the car; we open the cap of the cooling liquid and get a container to drain the old liquid, which we will then dispose of correctly at an authorized center.

The tube is located under the oil filter, and when it is detached, a shower is guaranteed! Let the liquid drain well and then put the tube back in place: replace the clamp if necessary. Now we need to refill the cooling liquid of the circuit, and to do this we need to lower the car again.

For the correct liquid, refer to the owner's manual; fill it, then open the bleeding screw of the cooling circuit located to the left of the battery under the heat exchanger. Blowing into the cooling liquid reservoir can be useful to pressurize the system, but it is not very hygienic, we do not recommend it: however, the system is pressurized when the liquid reaches the level of the bleed screw, which we can then close.

Remove the bleeding screw of the heating circuit - it is under the windshield frame - and repeat the pressurization of the circuit; we can reconnect the battery. Operation completed.


Posted on 8 October 2025 by ScegliAuto


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