mine isnt near as elabborate as yalls, but sounds like it would create a venturi affect going into the exhaust,actually pulling vapor from the ccv hose.
CCV Mod ?'s
Postmaster
Joined: Nov 2004
Posts: 2,854
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From: New Hampshire
Originally Posted by Hello
Our CCV systems were designed to be plumbed into the intake where there is a vacuum. That's how the close CC ventilation works. Now if you put it in the exhaust that is opposite the way it was designed. Even putting it into the atmosphere, I bet you get less flow than when it was in the intake.
I've seen old PCV systems vented out the oil filler with a steel mesh filter, but never plumbed into the exhaust. But that was not a closed system, with suction provided by the air cleaner.
When you say plumbing it into a exhaust pipe at an angle will draw out vapors, that may be true if it was atmospheric pressure. Cars in the 50's were using a downdraft tube for crankcase ventilation. But inside the exhaust pipe is not atmospheric pressure even 5 inches before the exhaut tips. I bet you there is as much pressure in there as in a leaf blower has on the low setting.
I've seen old PCV systems vented out the oil filler with a steel mesh filter, but never plumbed into the exhaust. But that was not a closed system, with suction provided by the air cleaner.
When you say plumbing it into a exhaust pipe at an angle will draw out vapors, that may be true if it was atmospheric pressure. Cars in the 50's were using a downdraft tube for crankcase ventilation. But inside the exhaust pipe is not atmospheric pressure even 5 inches before the exhaut tips. I bet you there is as much pressure in there as in a leaf blower has on the low setting.
Senior User
Joined: Jan 2005
Posts: 345
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From: Monterey Park, California
Originally Posted by johnny8
if this is true, and the ccv is supposed to be hooked to a vaccum.. then why does the port on the intake tube that the ccv hooks to face the wrong way..? if you look on the inside of the plastic piece that connects the intake tube from the air cleaner to the intake tube that goes to the turbo, the part of that molded piece that allows air to flow out of the ccv tube and into the intake tube faces the oncoming flow of air, meaning that the opening of that tube actually faces the air cleaner end of the assembly.... now, that opening is at a 90 degree angle, which points it directly INTO the flow of oncoming air... when you get some air moving through there in mass, (under moderate to heavy throtle), the oncoming air will overcome the pressure in the crankcase and PREVENT the crankcase gasses from entering the intake air stream until that volume of air becomes low enough for the pressure of the crankcase gases to overcome the pressure of the gas, (air), that is flowing throught the intake.... this is just the physics of air pressure and aerodynamics... i don't know why ford engineers or international engineers faced this opening in this direction, but there must be a reason...
OK I'll try to guess. If I was an engineer of our 7.3, and the CCV was speewing oil mist and droplets, I would want to disperse them in a manner that they would have the best chance of being vapor so it can make its way into the manifold. Facing the CCV tube toward the airflow will accomplish this better. It's still in a very high vacuum so there is no problem with the flow even pointed upstream of the airflow. This is very high vacuum in there enough to collapse a weak clogged airfilter. That's why the filterminder is there for.
Last edited by Hello; Nov 4, 2005 at 06:07 PM.
Post Fiend
Joined: Jul 2005
Posts: 14,582
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From: 21791
i think some of you have seen how i did mine, and it points into the flow of exhaust (towards the rear of the truck) and i havent had problems. i can really smell the stink out of the tail pipe at idle, so i know its working.
Senior User
Joined: Jan 2005
Posts: 345
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From: Monterey Park, California
Originally Posted by strokin_it7.3
i think some of you have seen how i did mine, and it points into the flow of exhaust (towards the rear of the truck) and i havent had problems. i can really smell the stink out of the tail pipe at idle, so i know its working.
So you know it's still flowing and relieving the crankcase pressure cause by blowby. Because of the turbo boost, crankcase pressure has to be relieved. You heard of oil blowing out dipsticks as a result, and blown seals. As long as it's working and no tell tale signs of too much crankcase pressure, then it's good!
Post Fiend
Joined: Jul 2005
Posts: 14,582
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From: 21791
it is on the left side valve cover. look under and behind the air intake pipe, there will be two screws holding this on.
edit- you said "what", not "where".... it is just a collector, nothing more.
edit- you said "what", not "where".... it is just a collector, nothing more.
Elder User
Joined: Jan 2006
Posts: 649
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From: Charleston SC
Dog house
Hey all.......Is it really necessary to remove the dog house and put the elbow toward the firewall? I have seen some that do and some that don't. I really didn't want to "disturb" anything unless I have to when it comes to "mods" I do to the truck. I also will be doing the Kwik along with this CCV mod. It seems easier to replace the whole intake tube rather than plug the hole where the oil got dumped into the tube....Any suggestions about how to fabricate the 4 inch and adapt it down to the size that goes into the turbo? I just got it and the wifey is afraid I will mess something up....I messed up when I sold the Harley!! Thanks for any advice..Dave
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Logistics Pro
Joined: Aug 2005
Posts: 3,884
Likes: 180
From: Morgan Hill, CA
A four inch diameter piece of big truck exhaust piping will work just fine. I just went to a truck supply house when I did the NAPA 6637 filter and had a piece left over that fit perfectly.
Logistics Pro
Joined: Aug 2005
Posts: 3,884
Likes: 180
From: Morgan Hill, CA
I don't know if this helps or not, but the intake tube on my early 99 is two pieces and I used both of them while putting on the 6637 filter and the CCV inlet delete. As you can see, there is an angled piece next to the filter. The straight piece of 4" is under the two stainless clamps in the middle of the inlet ducting. You're looking at everything up to the turbo itself.
Elder User
Joined: Jan 2006
Posts: 649
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From: Charleston SC
Looks good
Thanks for the nice pic. Looks like a nice system. I was just hopeing to eliminate the accordian plastic pipe and maybe make a smooth flowing tube all the way to the turbo. Thanks again.
Senior User
Joined: Nov 2004
Posts: 282
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From: Central Wyoming
Originally Posted by DaveWilliams
Thanks for the nice pic. Looks like a nice system. I was just hopeing to eliminate the accordian plastic pipe and maybe make a smooth flowing tube all the way to the turbo. Thanks again.
http://i26.photobucket.com/albums/c1...rfilter003.jpg
I used a 22* piece of 4" exhaust from a muffler shop and I had to cut some off of each end to get the angle right.