how to grill pork loin roast
5. Clean grate with grill brush. Place pork roast opposite side of the fire, closer to the fire than the outer edge. Grill covered, depending on the size, the pork loin grilling time should be about 30-45 minutes until an instant-read thermometer reads 135-140 degrees into the thickest part of the roast.6.ou can also make several shallow incisions around the surface of the roast and place thin slivers of garlic in each incision. 3. For an added optional smoky flavor soak 2 cups of wood chips in cold water 15-20 minutes. Drain water, place wood chips in a foil tray or metal wood chip box.