Originally Posted by whisper
Ummmm, I don't know what causes it but I've seen it twice on the motorway. Not a nice thing to happen.
Its normally the turbo's oil seals that fail which causes the running away problem. The engine starts feeding itself on its own sump oil ingested through leaking oil seals on the compressor side.
Seen this happen on a V8 Scania truck engine once (along with a few 1.9 Dci Renault engines).
All you can do is put the vehicle in the highest gear possible and try to stall the engine by driving away....(or stuff a pillow in the air inlet pipe to the blower)
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