TM 9-2320-209-20-3-3 c. Cleaning and Inspection. WARNING Dry cleaning solvent is flammable. Do not use near an open flame. Keep a fire extinguisher nearby when solvent is used. Use only in well- ventilated places. Failure to do this may result in injury to personnel and damage to equipment. (1) Using scraper, clean off any old gasket material on manifold. (2) Using stiff brush and solvent, clean inside of manifold. (3) Check inside of manifold. If there is rust or corrosion, throw manifold away. Get new manifold in its place. 18-176