Yep the esc was fine and the new motor is so much better.. besides fixing the squeal it also stutters less at the start and looks more serviceable.
Thanks all for you help
I guess its borked... where can I get a motor like that..all HK have is Sensored ..none to replace.. My local RC shop has these http://radientrc.com/Reaktor/ or should I just go for the same combo again hoping this was a one off?