Rattle from rear only at motorway speeds

[mackie]

Anyone else had this? My car is 3.0si Coupe. Basically a speeds around 70mph or over there is a rattle coming from the back of the car. I suspect it's due to airflow as it's not evident at all a slower speeds. I've had a quick feel around to see if there was a loose heat shield but it all seems OK, the arch liners a firmly fixed in place too. I'm going to get new pads and disks all round soon so I might ask the garage to have a poke around while they have it up on the lift. I did ponder if it could be the rear hatch that was moving slightly but it definitely sounds like it's coming from underneath.

 

[mackie]

ETA: I've had a more detailed look underneath and found that there's a screw/rivet/bolt missing from the plate (6) in the diagram below. I don't suppose anyone happens to know what part I need to fix it correctly do they? For now I'm going to just try and zip tie it I think.

 

[ranski]

It might be the standard 8mm bolt which is used to secure most parts

I would remove a 8mm bolt from one of the rear heat shields and see if it fits



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[mackie]

The hole it would screw into is quite small and the flange is thin suggesting it's probably a self tapping screw of some kind. I've zip tied it for now and will get it sorted properly when I get my brakes done.

 

[andysat]

Let us know if you have cured it.