Noise after start in warm condition

Hello forum. After highway ride, when it’s warm outside…and the engine is 0.9 TCE really hot,and you (so I ) take a break to make one to smoke….turns the engine off at the rest and starts again after cigarette…..so I think the engine is flying right around my ears….a noise coming at the front rear of the amature board, and pulls itself under center console. According to Renault air bubble formation on the cooling hose from the turbocharger……has anyone the same problem ???? Thank you for answers