Yep, Steve, we know all about "swamp coolers.";)

Those of us that fly are also familiar with the carb icing phenomenon in piston engined aircraft. In a car, you'll likely not even notice it, but it makes airplanes quit flying.:mad:

Frank

I was an Arizona boy for 30 years. Mention a swamp cooler out here and you get blank stares. I used to do the Imperial Sand Dunes thing many years ago and I've seen a few iced up Weber's on a buggy or two. Certainly not dangerous but it was odd to see it happen. Under the hood of a street car is probably not a likely place for it to happen though like you said.

Steve

Hey guys,

Thanks for all the info....Here's another picture and wanted to ask another stupid question. I have noticed several 240's that don't have these parts put back on, my 71 has them, but I was thinking of not putting them back on the 73 since I've changed the intake and carbs already. Question is will the car suffer at all if I leave these out.

Bobc, I will most likely shoot you a PM as I'm not really sure where the fresh air pipe is......I know, I know, I'm such a Rookie at mechanicals, but I'm using this car as my "trainer".....

Thanks for all the advice fellas................

oh yea, since these carbs have seperate air filters what do I do with the hose from the valve cover, it has nowhere to connect?

Randy, you can pick up a small filter to put on the valve cover, the one on the far right goes to the engine block and if I remember the 2 on the left were just tapped places to screw a bracket on.

Tom

Randy,

The hose fitting on your head is for PCV or Positive Crankcase Ventilation. With all of the movement going on inside the block, there needs to be a way to keep internal pressure from building up and blowing engine seals.

Previous to 1963 ('61 in Cali) it was vented directly to the engine bay. And therefore, straight into the environment. Connecting it to the air cleaner effectively ensured that all air in the engine would exit through the tailpipe. I've attached an image of an engine with a small filter like you should get.

-Jon

PS. The tube running under your intake manifold was mandated by the EPA in 1971. The "Thermal Air Cleaner" of which that tube is a part, was used to heat the A/F mixture during cold-start to better atomize the gasoline droplets.

Edited October 1, 200816 yr by JonnyRock
forgot picture!