Installation of an acoustic shield in a motor vehicle engine

The invention relates to an assembly (1) of an acoustic protection screen (2) on a motor vehicle engine, said assembly comprising: • a fluid tank (3), said tank being provided with a filling opening (4), said opening being intended to be obscured by a cap (5), • said screen which is provided with an access orifice (6) to said opening, said screen being provided at the periphery of said orifice with a sealing ring (7) bearing on the periphery of said opening, so as to achieve noise insulation of said motor emitted toward said orifice.