My 1998 Fiesta (1.3 Endura petrol engine) has been producing more engine noise than usual at some engine speeds. I've had a look under the bonnet, and there seems to be an air duct (I think) that runs from the air filter enclosure to a smaller kind of filter assembly directly above the radiator.
The air duct is flapping around loosely, because the foam washer that fits between the duct and the spigot at the top of the radiator has fallen to pieces. Would this account for the noise? Can anyone tell me what specific parts I should ask for at my friendly local Ford parts desk? Is it just a new foam washer I need, or is there something else that holds the duct in place that has fallen off?
Here are some pictures: