Just serviced my car but recently there seems to be a Vibrating Noise under the bonnet when the engine has warmed up and in Drive and now is happening in reverse. When I decided to check the engine whilst in drive I opened the bonnet and the noise stopped.
Does anyone know what is making the bonnet vibrate?

Thanks

hmmm what kind of magna do u have cos ur profile dosent say or i didnt see it.
have u looked at ur engine mounts lately?
is the noise only when the car is idleing (in D or R) and is it a first gen?
if so the timing chain might need adjusting. second gens do it automaticlly.
only metioning it cos before i adjusted mine the bonnet would shake alittle along with the rattle at idle, but after adjusting it went away.
also i have a mate whos magna has a crack in the headers and the makes the bonnet jump up and down a bit.
sorry disregard all i said except for checking ur engine and trans mounts. if there even a small crack starting anywhere ull find it needs replacing.

My magna is a third gen