Alright folks,

my mates car has started this knocking or rattling kinda sound. Sounds like its coming from the head.

Basiclly when u accelerate hard the car makes a clonk, clonk, clonk noise come from the engine but sounds like the clonk clonk is being spun round fast. However it does not do it on idle. You only get this bottom end kinda knocking noise when u accelerate. But does nothing on idle and sounds fine.
The oil light works fine and doesn't flicker or anything like that. We thought if your bottom end goes yoor oil light will come on etc, and yes the oil light does work.

any ideas?

cheers peeps, hope u can help out.