PCV location and type questions

[my5thmopar]

1972 Dart 318. Has the 2-piece-with-nut black metal pcv that is bad.

First: Does it matter which side of the engine gets the pcv? I have looked at pictures here and seems either side is OK.

Second: Does it matter if I use the 273 or 318 pcv? The 273 seems to be metal and the 318 ones are plastic.

Thanks

 

[slantsixdan]

There is no difference between a 273 PCV valve and a 318 PCV valve; the differences were by production date. Original equipment starting in '72 was the 1-piece plastic valve that looks like the current Chrysler p/n 5175351AA. The metal valve with retainer nut was used '64-'69. The '70-'71 cars got a half-metal/half-plastic valve. The '61-'63 cars got a different type of metal valve that could be disassembled for cleaning, and a brass or steel screw-on elbow.

It does not matter whether the PCV valve is on the left and the breather is on the right or vice versa.

 

[my5thmopar]

Dan.. Makes sense now, my 72 was built in May and the engine late 71. Thanks for the schooling.