Daily at the moment. Noisy when stationary and yes I think got worse when revved. Tbh it has gone now and I think it was a sticky starter but will check again once cold.
sometimes, the fan blades can catch on the housing when the engine expands, especially if the alt belt is really tight, or the fan shroud has been removed/replaced.... Sage words indeed!
could be starter, what condition are your belts in? ......if one of them has frayed slightly, could be part of the belt whipping on something as it spins .....definitely something relating to the motor though or as @vanorak says - fan?
if it still happens, get under it and give the starter a whack and see if it stops could try turning the motor by hand, might be able to marrow it down a bit .....sorry that's a veg pun
