Starved Rod Bearing.
Bent Rod
Bent Valve
or you sucked in a Screw and Plate.
All fixed. Used engine with 75k, new gaskets and seals, a new engine mount, new clutch, new hoses, new timing belt, water pump, oil change, fluids etc. Car is running like champ.
Could be. He wouldn't get much for it - not a huge market for 3 cylinder protege engines... I will try to find the link and send it your way if you're interested.Your old engine is now on eBay or Craigslist