Turbo Blown? Blocked Oil Line? 98 R33 Gtst 4Oth Anniversary Edition

[lvl_a_s_o_n]

bought the car, 1998 R33 gtst 40th anniversary series 2 or 3 i dont know, debatable, anyways, drove for a month, no dramas, one day lose boost and power so crawl 2km home whilst making ungodly bloody grinding noise, figured i blew turbo, so, bought a stock r34 turbo, installed it, topped up water and it was back to its old beastly self, infact running and sounding brilliant, so i kinda guessed problem solved right? wrong!! 2 days later, same situation, just putting along, not giving it balls, all of a sudden, loses boost and power again, same as before, did i do something wrong?? is there a blockage in the oil line? was it just a crappy used turbo at the end of its life?? split hoses have been replaced i dont know what else to do, buy another turbo and blow out the engine line with an air compressor?? kinda stumped any advice would be ace, cheers

[StevenCJR31]

without looking at it

it could be anything mate

[Ben C34]

You can take of the oil return and check how much oil is flowing through the turbo. there are specs for how much flow is required somewhere.

[lvl_a_s_o_n]

its making the same grinding kinda noise it made when i blew turbo the first time, but why did it blow another turbo 2 days after install? it was running perfect, its gotta be an oil issue yeah? blocked line? dirty oil? noise is definitely coming from turbo, sounds like metal on metal like there is no lubrication, should i have done oil change whilst changing the turbo instead of just topping up coolant?

[StevenCJR31]

do what superben said