TM 9-2320-209-20-3-1 1. Using l/2-inch wrench, unscrew and take off four nuts and lockwashers (1) . 2. Pull intake manifold heater elbow (2) off intake manifold (3). 3. Take off intake manifold heater elbow gasket (4). Throw away gasket. END OF TASK TA 051720 4-137