Regular turbo failures on a 156 JTD 20v
I have had my 2005 Alfa 156 JTD 20 valve for 4 1/2 years, absolutely love the car but can't understand why it eats turbos, every 8k to 12k miles.
Has anybody had a similar problem?
It had 18K on the clock when I bought it, from an Alfa dealer, at 8 months old, so don't know if it had already had a turbo swap. I have had three fitted under warranty, and it now needs another at 50k and it is out of warranty.
My local dealer and Alfa UK have regularly told me that there is absolutely no history of failures on this car, and cannot explain why mine has this problem.
Symptoms as follows -
Initially get an occasional whine/screach when cold that goes away as warms up.
Starts to get worse when cold and occasionally screaches when hot.
Starts to get a slight flatspot when putting your foot down at around 2k.
Gradually gets worse, then start to get intermittent ECU fails and finally ends up in "Limp Home Mode" with a Motor Control Unit Failure.
Not a lot of fun driving in this mode, even for a short trip to a dealer.
Dealers initial analysis indicate that there is low turbo boost pressure so dealer usually try swapping the cheaper turbo pressure sensors first, even though the screaching hints at a shot bearing.
Turbo eventually gets swapped out, paid for by Alfa UK on the original and then extended warranty.
Now out of warranty so seriously worried by the cost of one new turbo, never mind repeating it every 10k or so.
Have regularly asked the dealer if there are any oil feed problems, but they always say nothing obvious.
Have never pushed the car very hard, just use the massive torque, and always avoid switching straighht off after a long high speed run to avoid heat soak.
So three questions really.
Has anybody had similar problems?
Any thoughts on oil feed problems as surely JTD turbos should last much longer?
Any thoughts on an independent Alfa specialist, (within 50 miles or so of the South Yorkshire area, who I might use for a cheaper turbo rebuild and an examination of the oil feed setup?