I have a Zetec turbo that's just about to go on the rollers for a full map but I need to sort an over heating issue first, all the coolant pipes are plumbed in correctly, it has a new Ford stat, new pro alloy rad with slimline fan etc.Trouble is it just gets warmer and warmer even though the fan cuts in.

We had the head off ages ago to inpect the pistons etc and was all fitted back together with new parts.

Just wondering if there are any known issues like water pump impeller falling off ??? Just trying to save myself a little time here