Hey there, dunno if anyone can help me but here goes.

I have a 4x4 saph cosworth and recently its started to really tap like hell for the first 5 mins after a cold start. The noise is like a knackered cvh tbh and its really driving me up the wall. The oil levels are fine and there is no noise when the engine is started warmish.

Any ideas what i'm going to need replaced and the approx costs?