Verdict:-
Oil Cooler had an internal failure. The core split between the 10th & 11th row. Derale investigating why failure occurred. Looks like Derale will be replacing the
Oil Cooler under warranty, even though I purchased it 3 years ago. I suppose that's fair enough too as my Cobra has only done 1,200 k's. No pics as the fracture is internal.
Baz