300 TDI Turbo Failed then over reved. Help Please

[Sunnysidebb]

Hi all,

Mt Turbo failed on my 300tdi. Came to rest on hard shoulder and switched the engine off, but it didn't stop . Massive over rev then I used 5th gear to stall.
Garage confirmed Turbo failure, but engine now has a misfire on at least one cylinder.

Is there a common reason for this misfire. Had head off, pistons level ( no bent rod) I suspect rings?? As paraffin drained quicker from no 3 + 4.
Also found a small crack in the head between the inlet valve seat and the exhaust valve seat. ( I think this has been there for a ling time looking at it)??

Any advise or help before I have to source another engine.

TIA
Frank

[300bhp/ton]

Must be fuel as being a diesel there is no spark, either that or too low a CR.

I'd look for a replacement engine on eBay. I've not looked for a while, but they were going for £300-350.

[cpas]

Over revving like this is normally due to a blocked breather causing the sump oil to be sucked into the engine through the inlet manifold (possibly linked to the turbo failure) and the engine using the oil as a fuel. The high revving is because the 'fuel' supply is unregulated. The other problem may have been something with the injector pump, which ma be why you now have a mis-fire.