draft tube to pcv conversion

I would like to convert my 1962 comet 144cid from draft tube ventilation to pcv.
If i?
plug the draft tube
drill and grommet the valve cover to fit a pcv valve
or just get a new valve cover with pcv hole
drill a hole in the air cleaner
and hook the two together
i heard it maybe best to filter through the air filter than manifold vacuum
any thought or ideas would be appreciated

 

pull the draft tube put a pcv grommit in that hole run it to drirect manifold vacuum and put a ventilated oil fill cap on it ...and drive

 

Thanks 57!
the oil fill cap I have on now is the kind with mesh inside, is that the correct type


jeff

 

yeah that should work as long as it has holes around the bottom underside to allow air to get in it

 

Not trying to be a wise ***, but if you do a quick search on here, this has been discussed at length in multiple threads. Might check them out for ideas about converting from road draft tube to pcv.

 

more commonly done on chevy small blocks, but the same info applies.

 

thanks 57!
put a grommet in the draft tube hole with a 66 mustang I6 pcv
took the plug that was in my intake manifold out and screwed in
an air fitting and ran a 3/8 fuel line between the two.
had to turn the idle down and adjust idle fuel mix.
running smooth with same temp readingl!
what about some type of filter in that line?? oil separation filter?
Thank you again very helpful.

 

hey L 1940,

thanks I'll look again, thought i searched draft tube pcv etc pretty well.. did not find much.

 

That should work fine. A lot of guys used to modify the draft tube so that the part that fit into the engine block served as part of the pcv system and making it a bit easier to hook up the pcv setup in many cases.

The oil breather that you have is the right one to have as long as it is clean and lets the crankcase breathe.

 

remember that air is supposed to flow through the engine and is more than a vent to relieve pressure

 

thanks tommy for the pic
so what do you think of the method i used, it's okay?

 

You shouldn't need any type of filter on it. It sounds like you got it squared away. And now you won't chance having blow by roll out from under the car when you are cruising into a car event Nothing ruins the effect of your car when you are slowly cruising into a car event like blowby drifting out in the faces of the people watching you drive in.

 

It probably doesn't make any difference but I like to do it the same way the factory engineers did it. The road draft tube is where the air is pulled out of the engine as seen in the above flow drawing. I put the PCV valve there and pull the g***es from there into the intake manifold. The old push in breathers had steel wool in side to keep the big stuff like insects out of the crank case. Lots of ways to do it as long as you have air flow through the engine to remove the moisture out that causes sludge.

 

you shouldnt need any filter in the pcv line unless your engine has soo many miles on it that it has excessive blow by then its time for a rebuild not a band aid fix like a filter on the line

 

I know this is a dusty posting but, ... anyway.

Is the vacuum port that was used for the wipers which is located in front of the Carb on a Y-Block 292 enough vac and close enough to the center of the intake for running a PCV from the old draft tube location or does it need to go somewhere else?