147 JTD multiple turbo failures
South African Alfa owner here.
Onto my issues...
I own a 2006 147 JTD 16v, done around 150k km, I've owned the car since about 58k.
Around 3 months back there was a dreaded metalling tearing and the car was down on power. I immediately was sure it was a failed turbo. Drove it home, drove it to a mechanic the following day - he confirmed what I already knew. The turbo had popped and needed replacing.
I left there car with them around 5 weeks (apparently some other parts around the turbo were blocked? The turbo oil line I think, this took long to order from their supplier).
Anyway, eventually the car was returned, around 200km later it started feeling down on power and the turbo was whining more than usual.
I took the car back again - the turbo had failed again. The impeller blades were worn. The garage, after an argument, replaced this at their cost.
After about 300-500km the turbo failed again, similar to the second time, there was no instant of metallic noise and immediate lack of boost, it just slowly started feeling less and less powerful over time until on one hill it returned a MCSF. On receiving the car it was whistling more than it usually did, but:
a) I hadn't had my car for over 3 months at that point so wasn't sure if it was in my head or not.
b) After asking the mechanic he said that was just because it was new and would quieten over time.
So I've returned it again and now they're saying it's my liability as there were some metallic pieces going through the inlet side and that was what damaged the car.
Now it's unclear to me HOW metallic chips can get past the air filter, but they're, essentially, blaming me.
Has ANYONE ever heard about this sort of thing happening? Is there something fundamentally wrong with the car? Is there any value in replacing the turbo again or will it simply fail again in 500km time?