The OP was told it was "the" turbo nut. This implies it was the nut securing the compressor wheel to the shaft, this is in the centre of the compressor inlet and would be ingested IF it came loose. To guard against, this, these nuts are usually a left hand thread and/or self locking so very unlikely.

Unlikely a seized turbo would stop an engine instantly. Broken vanes etc could damage pistons and valves if ingested, but was the turbo damaged in this way?

http://www.yell.com/motoring/blog/vw-audi-groups-1-4-tsi-engine-known-issues/

http://www.honestjohn.co.uk/forum/post/index.htm?t=89334

http://www.honestjohn.co.uk/forum/post/index.htm?t=88869

http://www.honestjohn.co.uk/forum/post/index.htm?t=95584

Final diagnostics back from the dealership, cracked piston, broken piston rings, scored bore. Reason unknown, but getting complete engine minus ancillaries.

I've done my own research, *some* online information is pointing to a problem with the crankshaft bearings in the 1.4 TSI engines which then "de-centre" the piston(s) causing the failure.


http://www.motor-talk.de/forum/liste-aller-motorsc...

Final diagnostics back from the dealership, cracked piston, broken piston rings, scored bore. Reason unknown, but getting complete engine minus ancillaries.

I've done my own research, *some* online information is pointing to a problem with the crankshaft bearings in the 1.4 TSI engines which then "de-centre" the piston(s) causing the failure.

http://www.vwwatercooled.org.au/forums/f112/golf-118-tsi-engine-failures-resolved-via-service-campaign-24s4-44540-48.html

if you want to see a disintigrated TSi engine

http://golfmk6.com/forums/showthread.php?t=23481

I would contact the AA or RAC for an independant engineers report for them to decide if the nut came loose on the turbo. It runs in the oposite direction so shouldnt come loose unless there was alraedy a failure of some sort , in which case the garage should of been more observant first.

Yours didnt suck up water did it ? like the one above due to low air intake ? could be insurance job if it did !

Edited by injection doc on 30/05/2012 at 12:01

and another no to both questions.

I know how jerky and snatchy these cars get driving at low speed, but the timming chains should be able to handle that.

It sounds like your being bombarded with waffle.

Quite simply you took your car in for investigating a fault, garage failed to correctly diagnose, told you to use it, you did and it blew up ! end off.

In court it would not go well for the garage as you were paying the garage for a correct fault diagnosis and the courts would look upon the garage as making sure they did the job properly or gave you the correct advice !

I think the engine needs examining by an expert to established what failed first ! usually its a piston that cracks and bit fly off around the turbo ! causing servere mechanical distress

The garage claim:-

they correctly diagnosed the mechatronic unit and it was on order.

Advised use of car until parts etc were available.

The subsequent damge to the engine is in no way connected to anything they did or the use of the car with the mechatronic fault.

Hence my 'quest' to find some sort of connection between the two events.

Again I thank you for your help.