Bit Of Rattling

[Fawbs]

Right basically did an engine change ages ago and on startup when cold you rev the engine moderately and when it starts to rev there is a rattle nothing big but there is sumthing there. I have done about 3000miles in it this way and nothing is being effected, i changed the water pump and hyd tensioner but it is still there. listening normally it sounds like its coming from the alternator/cam area however i got a screwdriver against the oil cooler put my ear to it and u can hear the ratte quite well on that. That is what made me think water pump as its not too far away from it. The rattle isnt heavy enough to be somthing major sounds like something on the belt as being related to revving but im out of ideas at the moment. When you are in the cabin and you pull away it sounds quite diesel'ie low down. Havent done a real extensive investigation cause im off abroad in a few days so too busy but any help would be great. I would make a video but my camera is pure crap, also i just found what i think to be is my cat leaking somewhere looks like its blowing fumes about 5cm's down from the top of the dipstick, bummer.

[Fawbs]

ok pretty sure i know what it is now got some responses from gt4oc.net looks like its the clutch release bearing, which u can live with for a time

[Fawbs]

ok scratch that dont think its the release bearing when i press the clutch in there is still that slight rattle, first statement still stands

[PHILGTS]

check the exhaust manifold for loose bolts. could be the heat shield on your cat...