Cummins 12 Valve / 24 Valve & 4BT Freeze Plug Side PlateFreeze Plug Side Plate Fits 6B 12 Valve, 98 2002 24 Valve, & 4BT engines Please Read: This kit includes a high temperature Viton o ring, care must be taken not to cut or damage the o ring. The freeze plug bore must be cleaned with a wire brush or emery cloth to remove all rust and scale. The freeze plug bore must have a small chamfer to allow for the o ring to compress for a tight seal. Use motor oil to lube the o ring and freeze plug bore, then