Not all engines, but I don't believe this is the only example. However this thread is not about carbon build-up.aka_dk wrote:
Therefore I would suggest that this case is isolated and the issue with the original engine is isolated and unlikely to affect all engines.

And in any event the OP has a new engine that is working well - so it's a bonus for the purchaser of this car to have a young engine.
And Kudos to the OP for being upfront, that in itself should instill confidence for the purchaser of this car.
