great thread and advice chaps...
I've got a very similar noise on startup, albeit nowhere near as loud, and taking the advice i figured i'd clean out the sump and pickup filter, but also to replace the oil pump whilst i'm at it for some peace and mind. However, after reading the engine builder mag article i'm thinking, asides from a nice piece of maintenance, this is going to do JS to the noise even if i decide to swap out the camshaft tensioner as well! Is this going to be a case of spending time and ££s on chasing a non-existent problem???
When ya say your isnt as loud have you listened to it with the bonnet up as mine doesnt sound as loud when the bonnet is closed.