Rattle behind dash

[Bluey Green]

I’m at a bit of a loss. I’ve got a really loose rattle eminating from behind the dash (mainly passenger side I think) and I’ve no idea what it is. Thought it was the edge of the bonnet, so secured that. Still rattles. Wedged something in each air vent so they couldn’t move. Still rattles. Checked that the wipers are tight – you get the idea. Strange thing is though, when the car’s warmed up, it stops – which makes me think it’s fibreglass-related. Can anyone suggest anything else it could be?

[hilti]

I had that with my Tamora. It was the corner of the bonnet rattling against the body and the bonnet support strut, ( it was loose when in the down position, no load on it)

[basil brush]

Mine does that. It's the engine.