A third quick, prepurchase check is to drop the oil pan. Check this out-that's the oil-pump driveshaft hanging out in the pan. Also alarming was the milkshake-brown oil indicating the lethal mix of oil and coolant, probably due to a leaking intake manifold gasket. The combination of contaminated oil and a dropped oil-pump drive indicated why this car ended up in the junkyard in the first place. We knew to examine the crankshaft and pistons very carefully to see if the engine had seized up. "That engine probably knocked like a *@!#," exclaimed JMS' Mike Johnson.