thanks all for the warm welcome..

4bye4 thanks for the advise and lessons shared i will have a look at the intercooler - is it special porous alloy or special porous hoses and self loosening clips? i was looking at a catch can just as a play safe and same for the dawes valve..i think i saw a kit for the valve, EGR plate etc so i will order one of those and then gauges and then work out how to mount them...

Daveyboyjunior - i will be checking there as that would make sense - it appears the leak is intermittent as well.....

Cheers all..

Once i am back from the field i will share images of the tank...