Hi, when my engine cold, it knocks. Not a rattle, but a metalic knock. As soon as engine warm, ie temp gauge moves slightly it goes. Was hoping new oil would quieten it but no, it hasnt. Im dreading the thought of a big-end bearing going. Could just be piston-slap tho. Any comments or suggestions would be helpful. Its quite urgent, i have a 270mile commute every week. Last thing i need is for the engine to go bang, I love my TA!!