"The Problem" is that this engine's original connecting rods bent,
apparently from metal fatigue. A bent rod caused its piston to score the
cylinder wall. #1 and #4 cylinders were particularly involved.
Original purchasers of these cars (when new) received new or repaired
engines, subsequent purchasers pay their own (substantial) repair bills.
More substantial connecting rods were later offered as replacements, I
don't know if those are still available.
I like diesels but, IMHO, wouldn't buy one of these cars unless it were
discounted by the cost of a replacement engine.
Don't know if '93 MY engine was any different.