thats something a lot worse than a bit of petrol in diesel
dont take my word for it, but the last time I saw that amount of smoke from a diesel, was because the centre bearing of the turbo had given up, and the turbo was now sucking/feeding engine oil into the induction system.
:thumbdo: thats not good news...it would not have been the petrol in the fuel, that caused that though, it was going to happen sometime.
I hope its just gasket that needs replacing, good luck
where about in Durban are you based? When i needed help in Durban Kish referred me to his mechanic. I cant remember the address right now but maybe you can give him a call. Will PM his number