Clicking noise when driving at low revs?

Hi all, just bought an 04 td4 sport. I've noticed when i first pull off and when I'm going through the gears at low speeds round town the engines makes an alarming clicking noise, it tends to go once I get the speed up and sometimes it doesn't really click at all. Has anyone else experienced this or have an idea what may be causing it.
Thanks in advance

Has anyone else experienced this ..

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something like it .. yes .. when i bought the vehicle in feb this year .. had 37k miles on it ..
the clicking/tapping was quieter after the engine had warmed up ..
had a metallic sound to it ..

heard it most at low revs .. i suspect higher revs simply masked the sound
wasn't sure if it weren't just part of the general td4 sound ..

i used this in the engine oil .. 'n once in a while a drop or two in the fuel
ZX1 Home

been using :
Diesel Rhino
in the fuel .. ( was known as 'diesel aid' in a previous incarnation )

along with
'redex diesel fuel system cleaner'
now and again

sometimes have added a small amount of 2-stroke to the fuel

i've a small glass jar that gets used to make a 'mix'
'n add it on alternate fuel-ups ..

over time the clicking/tapping vanished

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or have an idea what may be causing it

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mine sounded more in time with the valve train
no idea what it was .. a partialy sticky valve Maybe
can't realy say at Exactly what point it Totaly vanished ..

after adding the zx1 it quietened down Almost immediately
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http://www.rover-club.net/graphics/manuals/16/m47r_diesel.pdf

Mmm, I'll pop down the motor factors in the morning and give those products a try cheers guys

Not something non-engine related is it like brake pads knocking on 1 side?

Don't know about the brakes, have you had that problem then?

If you give the throttle a good blip does the noise go? If so sounds like an injector.........trying the injector cleaners etc may help and if you have a synergy tuning box turn it off now.