Dave,

That stock piece of plastic and be replaced by a 4 inch mufflet pipe that is 3-1/2 inches long. Any good muffler shop should have it.

Pop

 

ok I have noticed several people express a concern that the exhaust preasure would create preasure in the cc, well as someone else pointed out putting the pipe into the exhaust at an angle approx 45 deg in the direction of the exhaust flow will actually create a vacumn in the cc line. The closer to the engine you install it within reason. I don't mean right behind the turbo but maybe right at the end of the downpipe before it goes into the bigger pipe if you downpipe is smaller than the rest of the exhaust system is where the exhaust gases will be flowing the fastest and the faster the flow past that pipe the more negative preasure that will be created.
If you look in my gallery at the 88 ranger race truck you will find pics of this type of system used on that, it's called a crankcase exhaust evac system, and you can actually buy that kit, and if you look closely those have a one way valve right at the part going into the exhaust that prevents any preasure from going back up into the crankcase but I have checked mine and at 2500 rpm (not even close to what that engine runs but where I checked it) each one of those is pulling 2in of vacumn at the valve cover.
Also I would think that putting it closer to the engine would probably burn any oil that came through the line thus making it so it didn't pool at hte end of the exhaust.
here is the pics I was talking about the first one is the current engine, second is my old engine but both show what I am suggesting.
https://www.ford-trucks.com/user_gal...oid=78198&.jpg

https://www.ford-trucks.com/user_gal...oid=42573&.jpg

Yes I know those are both gassers, but the principles of airflow dynamics will apply equally, and maybe even more so on the diesels, and is how I am planning on running mine when I get to it this summer.

 

How much does something like that cost? And where would one look to buy such a thing?

 

I am sure you can get them other places easy enough but I know that summit carries them. The entire kits are available from moroso, or Mr gasket part numbers on summit are MOR-25900, and MRG-6002, or you can just by the check valves individually on summit part number MOR 97800. They also have the weld in piece but I just use a piece of 1/2" black iron piipe for that.

 

i'm gonna redo the ccv mod on my truck this spring and i am going to plumb mine into the exhaust also... thanks for the info, i think i'll shop around for parts or a kit of some kind...

 

That'd be sweet. I have read about guys doing exactly that with no problems.

For what it's worth, my attempt at a venturi realized little to no vacuum detectable with the 3/4" diameter and about 4 feet of hose attached. I used the old "hold a really thin diesel receipt on the end at idle and see if it sticks" method to measure vacuum. It didn't stick. However that was at idle and there could be an effect created at higher speeds plus my angled fitting wasn't going very far into the exhaust pipe. This mod is really just a basic re-route. No one has ever screwed up their motor doing it that I've heard of. The closest you can come is if you just plug it the dipstick will probably burp out and overflow some oil. The point is you are pretty much free to do whatever with the end of the hose as long as you don't cap it. There are a lot of innovative ideas out there.

 

Well I agree at idle there probably isn't enough airflow past the tube to pull a vac at idle, since the exhaust has to be big enough to flow at higher speeds and loads it's actually way overkill on size at idle but run the rpms up to around 2000 and see what happens or put a vac gauge inline and run it down the road you will see some, not a lot but some. It's not going to pump it out but as long as there is neg preasure inline it's going to keep the gasses and preasure out of the crankcase.
but for what it's worth I agree you can get away with about anything without killing the engine unless you just plug it off.