What does the hose on the rear of the valve cover go to? Mine has never been hooked up to anything but I am thinking maybe it should be?

 

The rear hose with the red x should have a PCV valve in the rubber grommet in the valve cover, and the hose should connect directly to that. The other end should connect to where the hose out of the oil fill cap is connected.

THAT hose should connect inside the aircleaner, sometimes with a little filter inside the housing.

As it is set up, I'm surprised you aren't sucking oil into your intake from time to time.

Positive Crankcase Ventilation (PCV)

PCVs keep things tidy inside the motor when they are working connected. Of course, a worn out motor is going to overpower them, but you'd know that by now as you'd be foggin' mosquitos in 4 counties with that set up.

 

I hooked the front hose up to my intake exactly as it was hooked up to the stock intake manifold when I had the 1 bbl. Considering my air cleaner has no way to hook up ether of the hoses should I just run the rear valve/hose to the PCV port at the base of the carb? My engine doesn't burn oil and hasn't in over two years and even if it ever does its smog exempt so I am not to concerned with it.

 

The rear hose doesn't have a valve... its just a big rubber nipple.

 

The rear hose should have a pcv and be hooked up to the base of the carb. The pcv valve prevents oil from coming up the hose, but lets the fumes pass.

The front hose is the air supply for air going into the block as the air is sucked out of the block by the hose connected to the base of the carb.

If you put some kind of filter on the that breather--they make K&N style breathers iirc, then you'll have clean air going in and the fumes evacuated from the engine. This will reduce sludge and goo build up.

k&n oil breather cap - Google Search

 

yah there is no way to connect that filler cap to my air breather. I'll just hook the rear pvc to the carb and leave the oil filler cap with the PCV it has in it with the hose detached and free floating. It ran before I don't see why it won't run like that.

 

Two things:

--put a pcv valve in there first.

--find some way to have filtered air go into the breather. You don't want to suck dust into the motor.

 

Hooked up the pcv and capped off the side of the intake, I'll just have to run it with the gas cap open for a week or two, its due for a oil change anyhow.

 

There should be a "punch-out" in the base piece of that air cleaner housing. A grommet/fitting goes in that hole (available at parts houses) to which the hose from the front of the valve cover attaches. The hose at the rear of the valve cover should be attached to a PCV in the valve cover and the other end attached to a manifold vacuum port.

 

A lot of autoparts stores have oil breather caps that have a filter inside of them. Makes it so you don't have to add any more hoses or routing. I usually change mine every 3 or 4 oil changes when it starts to get dirty.

 

This air breather is a cheap one and I didn't buy it I got my carb/intake off of a 240 I picked up for $150, but it didn't have a punch out so considering the chrome is covered in rust I just drilled a half inch hole in the thing and mounted a plastic nipple off of it and hooked it to that.

 

Looks like it works great. That's how my other 300 is set up. As long as it's drawing in fresh air...

 

Well as a unexpected benefit to plumbing all the hoses correctly, I while driving it normal gained 2 mpg =/ I wounder if the crank case drawing fresh air threw the manifold wasn't messing up my vacuum.

 

It very possibly was.