[corning_d3]

I've always drain a quart of oil out n replace it with diesel n run it about a day. Drain the oil and leave the plug out. Remove both rocker covers n pour diesel over both banks of rockers so that it flows down the oil returns. Pour enough until clean diesel comes out the pan hole. This flushes all the gunk on the bottom of the pan out the drain hole. I suppose this is a long way to do it, but I've never had a failure..