The Plymouth Owners manual 1929 states:
Air Cleaner
The air drawn into the carburetor contains a certain amount of dust which is an abrasive, and if allowed to enter the cylinders will cause more rapid wear of the pistons, rings, cylinders, and it gradually works into the oil pan and is circulated through the engine. The air cleaner ( Fig. 8 ) removes the dust from the air before it enters the carburetor by centrifugal force of the air currents within the air cleaner and throws it down into the open space beside the engine. The draft from the radiator cooling fan drives the dust past the engine. The air cleaner requires no attention.
Vents in the front of the air cleaner get the incoming air rotating. Theoretically it sounds OK but I wouldn't want to be in a sand storm in the desert. Keep an eye on ebay.., they sometimes pop up. A good Plymouth swap meet might also do the trick.
Hope this helps. Chet...
Air Cleaner
The air drawn into the carburetor contains a certain amount of dust which is an abrasive, and if allowed to enter the cylinders will cause more rapid wear of the pistons, rings, cylinders, and it gradually works into the oil pan and is circulated through the engine. The air cleaner ( Fig. 8 ) removes the dust from the air before it enters the carburetor by centrifugal force of the air currents within the air cleaner and throws it down into the open space beside the engine. The draft from the radiator cooling fan drives the dust past the engine. The air cleaner requires no attention.
Vents in the front of the air cleaner get the incoming air rotating. Theoretically it sounds OK but I wouldn't want to be in a sand storm in the desert. Keep an eye on ebay.., they sometimes pop up. A good Plymouth swap meet might also do the trick.
Hope this helps. Chet...