duster3

So I have a couple questions regarding the air filter on my Duster. There are no rubber hoses hooked up to anything on the air filter housing. Are these hoses necessary for a better running engine? On the bottom of the snorkel of the housing in the first picture is a big hole, I believe this goes onto the driver side exhaust manifold some how...at least on the other cars I have seen. I do not have this, do I need it? It kind of connects to a metal flap that bounces up and down.

Next on top of the snorkel piece, would have a small vacumm hose that connects somewhere..Any ideas?

The last picture shows where it a hose should go into the breather off the valve cover, it seems to run fine without any of these hoses hooked up...

*But will it run better if I connect these to their right spot on the motor?
And what is the purpose of each of these hoses???



Thanks guys!!

Mr.4spd

The deal on the snorkel is for cold weather warm up, I wouldn't worry about it. The breather hose won't make it run any different but won't hurt either way.

440roadrunner

This is somewhat general, as things vary over the years

Generally, if there are two snorkels with flapper/ vacuum motors, the two are tee'd together to act as one. They go to a thermostat valve, which was generally right on the air filter housing somewhere, then to manifold vacuum, so the thermostat opens/ closes the vacuum flappers to keep the snorkel air temp "somewhat" regulated. The bottom round outlet went to hi temp hose to a "stove" on one exhaust manifold.

All this was pretty much for emissions, but because "smog" carburetors were jetted leaner, this also helped cold weather operation.

The 5/8 or so fitting went to a hose which went to a breather on the opposite side of the engine from the PCV valve. I can see in the one photo you are running an "open" breather. If you were to get one with a grommet hole in the top (if that's a bayonet, twist in cap) one from a 70s Ford 390/ 302, you can put a grommet and elbow in the top and hook a hose from it to the air filter bonnet.

This was also required for emissions, but helps keep oil blowby off the engine, and possibly fumes out of the cabin.

From the '72 shop manual:

duster3

Thanks alot for the responses! Makes me feel a bit better about the set up I have.

And that diagram helped out alot.