I've already posted in the main water pump thread but I need some fairly urgent advice before I bite the bullet and get it replaced. Around 6 weeks ago my car over heated, I pulled off the road, turned it off then on again and it worked fine until this morning.  Well I say fine, it may have been taking a little longer to get to temperature but I put that down to cooler mornings.   This morning when I think it was trying to do a DPF regen, I got a warning that "operating temperatur