4.5 Engine Rebuild

[kenton]

I have a 2000 4.5 Cerb LW (4000 miles)and the engine has just lost all power, like try to pull away with the handbrake on and the engine flooded. Service guys tell me that the engine will probably have to go back to TVR for a rebuild. They havn't got to the bottom the problem yet, but when they tell me the bottom of one of the sparkplugs was flattened it does not sound good.
Anyone know of any problem with the 4.5 engine? I have heard horror story about the straight six but not the 4.5

[kenton]

The engine is now having a holiday in blackpool.

When I find out what it is I will post