is this engine worth fixing? the labor is very cheap where I live.... is it likely that the crank is not serviceable?
Cheap labor sometimes not working properly with these cars.
If u are going to rebuild properly u will be just in gaskets and bearings around 3500$ (main bearings, rod bearings, piston rings, bolts, head gaskets)
If u are looking for cheapest way - that is junkyard 6000$ engine, they should warranty it for at least 6 months, try to get it from a big company.
And no, this is not 500$ repair if u decide to go with cheap repair in a garage that never had this car before they will end up changing bearings, and in 60-90 miles (depending how you will drive) u will have same knock or worth scenario hole in the oil pan.
Good luck, i feel your pain, i was in the same boat almost 2 years ago.
LMK if u decide to sell your car