14,000 is more likely manufacturer failure or running dry (no oil)
I cannot be sure, but you should spent not more than £2k and have engine totally rebuild = new
Have a second opinion - crankshaft ?!?! I have flywheel broken and have done already 40k with that.
But comparing price of your car I would suggest to preserver the engine (drive sensible, easy and smooth) and wait until it will die. Make sure you have oil levels close by high marking to make sure of good lubrication. Just make sure you have AA cover and when you use them you know you have to get a new car
As soon as I will be back on a bike I am happy to listen to this engine and share my feelings 8-)
