Scania emissions

Place where I work has a Scania blowing “white smoke”
EGR heat exchanger failed as usual.
They rang scania and they want two grand!!!
Told em about the "tuppeny " repair.
You get two penny washers,braze up the hole in the middle,grind them down to fit the inlet and out let coolant pipes and braze them in.
No more leaks,pass mot no problem,bit more power and maybe half a mile per gallon gain in fuel consumption.
Happy days.
Why pay two grand for something that does absolutely sod all except make these robbin main agents a lot richer at your expense?
Its all a scam.