Well, my bad!! End of the day... the issue was......
My car started leaking diesel, and I didnt realise, I then noticed a puddle on the floor, and realised it was diesel, after wondering why I was using so much diesel so fast.
It turns out, the diesel cooler itself, has a plastic tray type thing, that is meant too protect it. But it was this casing that caused the problem.
The forks, that clib the pipe from the diesel cooler, into it, became lose which after some time obviously made a whole. As the corner of the plastic kept rubbing on the tube from the diesel cooler.
So, all in all, anyone with a diesel, get rid of the crappy plastic thing near the cooler, which sits under the drivers door.
As this could also make a whole in yours
