Thanks everyone, we have now proved our Bongo needs a new radiator, ho hum!

Thank you all, the above tips were spot on, and out came the plug. BUT... with the aid of a young friend who has some (amateur) knowledge of cars, we removed the radiator header cap thus releasing air locks, only to find dampness along the TOP of the radiator. At this point the top of the tank ...

OK, thank you, I have done a coolant darain and refill in the past. Good old Bongo Club folk!

The plug is black. I have a box of various size O rings, would these liekly be suitable? Thanks again

We returned from France 2 weeks ago having driven about 1,200 miles with no problems. The Bongo has since been parked, but is now slowly but steadily dripping coolant from the radiator drain plug. The plug is fixed tight, I cannot move it clockwise or anti-clockwise, though I have not tried very ...