Kluger Screams On Cold Start

The only way I can describe it - Only when it is dead cold and only on the first turn over.
Sounds like belt but it may not be
Dealers dunno
Tried fooling around with belts - no improvement
Dealer tried keeping it overnight to hear it in the morning and some fool moved it before anyone could listen. Asked me to leave it another night!!!!!!!!
I doubt if anyone is going to be able to diagnose from hearing it once anyway so I took it away.
Has anyone else experienced this type of thing?
Is there anything else I should be looking at apart from belts ad pulleys?
I have tried soap etc.... etc
It is the same motor used in Lexus 330 but I don't know about belts etc.

Thanks in advance