[thstone]

Compared to swapping in a salvage or replacement engine, it will cost more to tear down the original engine, find the cause, find the collateral damage, clean everything, repair the engine case, replace the damaged parts, replace a number of parts "while you're in there", and re-assemble.

But at the end of the day, its your money and if you want a rebuild, it can be certainly be done. It just won't be the least expensive path to getting the car back on the road.