Heres the update , had a good look today in the light, took off the front grill and the bottom of the rad was blocked , lots of hosepiping later and its clean , round the block a few times and its better, ie takes longer to get into the red.
got underneath it and it all becomes clear. the bottom hose has a big kink in it , not collapsed but the wrong one altogether, the guy i got it from obviously lashed a hose up to fit, so the next question is , which bottom hose should be used, bearing in mind it is a disco engine in a defender, should it be a defender 200tdi hose or a disco 200tdi hose,
Thanks in advance Guys.
PS any help in a hurry pls as My mate is a game keeper of 650 acres in Devon and i have an invite for the weekend