Yeah, when I bought my Patrol the seller said it had a “new” turbo. What did I know? It didn’t blow, just stopped working, got loads of wastegate chatter and the car was gutless on hills, plus used to go into limp mode. Took it to a couple of garages, couldn’t figure it out. Took it to Wade Diesels in Hoddesdon. Expensive but sussed it in minutes. Apparently you can’t recon a Garrett turbo, or you can, but it only lasts a few months (thus is a waste of money). They stuck a new turbo on (£750, plus new oil (bloody car takes 8ltrs), labour, VAT = £1200-odd) BUT it goes like a rocket now.
Moral? For me anyhow, I’d just buy a proper, new, turbo. That way, if it f*cks up, you’ve got some proper come-back on the manufacturer. Otherwise, bin the car and start again with something else.
HTH
Just re-read this. I was intending to share information and be helpful, but it may sound a bit peremptory. Apologies, no offence intended.