If the E is in good shape it would be worth replacing the engine and if you decide after getting the 2nd diagnose that the engine has a bad hole find out like others have said if its ether the valves or rings. I have seen used engines with low miles going for a low of $600 up to 1500. If you do not want to fix it and sell it put it on this site or Craigslist or Ebay and get the most out of it as there are people like me that will buy it and repair it.