Scott_DeWitt
Vendor
Do you mean being realistic? or negative. Negativity would be "That swap sucks, or "You're a moron".. etc.., and I don't need a bunch of negativity.
I've done a number of diesel swap and sourced components for dozens of swaps and I try to be as realistic as possible with cost estimations and what is needed. Every swap I've done has been on par with what the factory would have done so I base all my comments on the level of quality of work that would come from VW if you could buy something on the dealer floor.
Realisitcally that undergoing swap will have some huge hurdles.. Namely the fuel tank. The Jetta will not work and I suspect it will be either unsafe or impossible to convert the gas tank due to the emissions of the Common rail engine. I'm 98 percent confident the Jetta tank will not fit meaning you will have to source a TDI tiguan tank.. Meaning a significant expenditure, but again if I am negative by saying that I would install a diesel specific tank, or negative by outlying the true costs of said swaps then I guess I'm a stick in the mud. Not that I'm poo ping the swap but not having the proper transmission or proper fuel tank is just shoddy work.