slight tapping noise in engine?

[red98]

why number 3?  tapping is slightly louder on the right  .....a tip i have used before to save you taking the cover off....get yourself a long screwdriver and place the pointy end on the engine where you thing the noise is coming from,place the other end to your ear,firmly,the screwdriver will amplify the tapping noise,move the screwdriver around the engine until you locate the position where you can hear the noise most/clearest...this should tell you if either chain or shims......you will feel a bit of a numpty doing this but it does work  ......cant see it being clutch or the cam chain making the tapping noise