Abstract: Anti-smog means for internal combustion engines of the type having a fuel intake channel and an exhaust pipe. A pickup chamber is connected to the exhaust pipe. A tank is connected to the pickup chamber. The intake channel is connected to the tank to feed unburnt hydrocarbons from the pickup to the fuel intake channel. A curved box in the pickup facilitates separating unburnt hydrocarbons from water and solid particles in the engine exhaust. Positive cleaning manifold valve facilitates the separation of escaping loose hydrocarbons from water at sludge surge chamber of valve.