cold engine rattle only at certain revs

[Remus]

hello.

I got a 1.0 coil pack 2001 micra
i noticed a rattle around 1400 rpm and again at 2400. this happens when the engine is cold. after reaching working temperature the sound goes away
the sound seems to be located on the driver side of the engine

any help welcomed
thx

 

[Agent_Sm1th]

Make sure it's not the exhaust heat shield. This is the usual culprit. Remove it. It's not required.