bentley1

I drive an 05 viii and recently at an idle there is a metel on metel clunking noise and the oil light will flicker??? Oil level is perfect does this mean i am loosing oil pressure?? When i rev it up to 1000 rpms it stops and starts again when i let off. Doesnt seem to do it all the time maybe 60% of the time. Sounds terrible and i really want to get it fixed. If anyone has dealt with something like this please help!