CCV mod into exhaust?
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Junior User
Joined: Dec 2005
Posts: 51
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CCV mod into exhaust?
Looking through some web sites today, and the guy said he had ccv mod goin to the exhaust. What to do ya do to do that? put a mini turn down bung type thing in ur exhaust pointed with the flow im you understand me?
Elder User
Joined: May 2007
Posts: 691
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From: Florida
it has been covered a few times on the forum ... there are mixed reviews about doing this though most think it does not creat vacum and rather creates pressure leading to leaks and such. im sure someone else will chime in, but for now u can do a quick search on the ccv mod and u should have plenty to read.
Lead Driver
Joined: Oct 2004
Posts: 7,413
Likes: 1
From: Columbia, MO
A number of us have tried it, including me, but have since removed it. I put a pressure gauge on the tube that I had running into the exhaust, like you described it with the bung in the direction of the flow, and it actually was not providing a suction, but giving pressure. If hooked up to the CCV, this would pressurize your crankcase, which is a bad thing.
The general concensus is to stay with a free flowing tube that just vents to the atmosphere.
The general concensus is to stay with a free flowing tube that just vents to the atmosphere.
Postmaster
Joined: Jun 2006
Posts: 2,647
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From: Fulltime RVer
Originally Posted by jtharvey
A number of us have tried it, including me, but have since removed it. I put a pressure gauge on the tube that I had running into the exhaust, like you described it with the bung in the direction of the flow, and it actually was not providing a suction, but giving pressure. If hooked up to the CCV, this would pressurize your crankcase, which is a bad thing.
The general concensus is to stay with a free flowing tube that just vents to the atmosphere.
The general concensus is to stay with a free flowing tube that just vents to the atmosphere.
Did you catch my post #34 here https://www.ford-trucks.com/forums/721356-problem-getting-people-to-fte-3.html inquiring about your whereabouts?
Gone, but not forgotten
Joined: Oct 2005
Posts: 5,026
Likes: 2
From: Charlotte-Fairbanks-Bflo
Originally Posted by jtharvey
A number of us have tried it, including me, but have since removed it. I put a pressure gauge on the tube that I had running into the exhaust, like you described it with the bung in the direction of the flow, and it actually was not providing a suction, but giving pressure. If hooked up to the CCV, this would pressurize your crankcase, which is a bad thing.
The general concensus is to stay with a free flowing tube that just vents to the atmosphere.
The general concensus is to stay with a free flowing tube that just vents to the atmosphere.
Postmaster
Joined: Jan 2004
Posts: 4,758
Likes: 7
From: colorado
Originally Posted by jtharvey
The general concensus is to stay with a free flowing tube that just vents to the atmosphere.
i agree 100% ..the exhaust is always going to have a higher pressure than atmosphere espcially when your on the throttle.
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Senior User
Joined: Feb 2008
Posts: 237
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From: Glenwood Springs, Co
back pressure even if you routed it into the exhaust pipe w/ 3/4 hose 3' in front of your exhaust pipe tip?
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Lead Driver
Joined: Oct 2004
Posts: 7,413
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From: Columbia, MO
Gene, the move to GA actually fell through, so I'm plugging away at it here in Columbia, MO. Let me know when you'll be coming through and we can meet up for lunch, dinner, breakfast or whatever you're in the mood for. I'm out of town the very last weekend in April, Friday thru Sunday though.
Mark, are you by chance going to be at Smokin? I still have the bung in my exhaust because I haven't bothered to remove it yet. What I used was an crank case evac kit from Jegs, so I think it should have the properly angled and cut tube to work like that.
I thought for sure something like that should make a vaccum also. However, my observations are exactly the opposite.
I ran it into the elbow right before my stacks, so it was more like 5 feet of exhaust.
Here's how I had it done, click thumbs for larger pics.
Originally Posted by Markadeck
I am not going to start something here, but I will say that I would have to see this to believe it. My experience (high performance) has been that a properly angled tube will created a vacumn from where ever it is fed.
I thought for sure something like that should make a vaccum also. However, my observations are exactly the opposite.
Originally Posted by rivrrunner
back pressure even if you routed it into the exhaust pipe w/ 3/4 hose 3' in front of your exhaust pipe tip?
Here's how I had it done, click thumbs for larger pics.
Logistics Pro
Joined: Aug 2005
Posts: 3,884
Likes: 180
From: Morgan Hill, CA
Originally Posted by ernesteugene
Glad to see that in my absence you've become the "watch dog" for recommending against the mod venting the CCV into the exhaust! Keep up the good work.
Did you catch my post #34 here https://www.ford-trucks.com/forums/721356-problem-getting-people-to-fte-3.html inquiring about your whereabouts?
Did you catch my post #34 here https://www.ford-trucks.com/forums/721356-problem-getting-people-to-fte-3.html inquiring about your whereabouts?
I have mine run into the exhaust and it will stay that way for ever and ever. I know Gene measured a psi or two of pressure but I say "Maybe I've got more blow-by!" Seriously though, I've had mine into the exhaust for well over 100k now yes I had a leaky o ring on the side of my pan but I just don't believe it was caused or exacerbated by a little pressure increase. O ring seals routinely see many, many times that pressure. Besides I've read about guys having their dipstick pop up from being seated on the tube from excessive crank case pressures.
Anyway, I'd say there is no agreement over which way is right. I prefer mine this way because I don't want my extra emissions seperate from my primary emissions. I like it all mixed up.
Post Fiend
Joined: Feb 2007
Posts: 14,541
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From: Dallas-Ft. Worth
If you put a pressure gauge on your oil cap & measure a lot of pressure with it hooked up, and not as much with it vented, I'd consider that "seeing for yourself". I didn't have to -- I took the good word of Gene and several of the others that had theirs measured. Extra pressure in your CC is a bad, BAD thing...
Lead Driver
Joined: May 2007
Posts: 8,608
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From: Belair md
the angle must be perfect in the pipe to get the vacum vs pressure, it does work if done properly, ther is a topic about this in the 94-97 pages, i will have to find it and post it here, but if you just plug the tube into the tailpipe then yes you will pressurize your crankcase. the angle and amount of tube in the tailpipe has to be correct to get the vaccum formed, after that you will be set for life
Postmaster
Joined: Jun 2006
Posts: 2,647
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From: Fulltime RVer
Originally Posted by c00nhunterjoe
the angle must be perfect in the pipe to get the vacum vs pressure, it does work if done properly, ther is a topic about this in the 94-97 pages, i will have to find it and post it here, but if you just plug the tube into the tailpipe then yes you will pressurize your crankcase. the angle and amount of tube in the tailpipe has to be correct to get the vaccum formed, after that you will be set for life
Bottom line is that crankcase pressure measurements show increased crankcase pressure when the CCV is vented to the tailpipe post turbo!
Gone, but not forgotten
Joined: Oct 2005
Posts: 5,026
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From: Charlotte-Fairbanks-Bflo
Originally Posted by ernesteugene
See post#30 (and others) here... https://www.ford-trucks.com/forums/669729-ccv-smokin-2.html , for an explanation why it DOESN'T work post turbo on a diesel, but DOES work on a high RPM gasser, if the bung is placed at just the correct location in a tuned manifold collector where it sees the negative pressure pulses in the exhaust flow. Even then, a check valve is required to stop the positive pressure pulses from blowing back up into the crankcase.
Bottom line is that crankcase pressure measurements show increased crankcase pressure when the CCV is vented to the tailpipe post turbo!
Bottom line is that crankcase pressure measurements show increased crankcase pressure when the CCV is vented to the tailpipe post turbo!
Postmaster
Joined: Jun 2006
Posts: 2,647
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From: Fulltime RVer
Originally Posted by Fat Diesel
Hey Gene! How's the "big rig" treating you? It was nice to meet you when you were in this neck of the woods.
I have mine run into the exhaust and it will stay that way for ever and ever. I know Gene measured a psi or two of pressure but I say "Maybe I've got more blow-by!" Seriously though, I've had mine into the exhaust for well over 100k now yes I had a leaky o ring on the side of my pan but I just don't believe it was caused or exacerbated by a little pressure increase. O ring seals routinely see many, many times that pressure. Besides I've read about guys having their dipstick pop up from being seated on the tube from excessive crank case pressures.
Anyway, I'd say there is no agreement over which way is right. I prefer mine this way because I don't want my extra emissions seperate from my primary emissions. I like it all mixed up.
I have mine run into the exhaust and it will stay that way for ever and ever. I know Gene measured a psi or two of pressure but I say "Maybe I've got more blow-by!" Seriously though, I've had mine into the exhaust for well over 100k now yes I had a leaky o ring on the side of my pan but I just don't believe it was caused or exacerbated by a little pressure increase. O ring seals routinely see many, many times that pressure. Besides I've read about guys having their dipstick pop up from being seated on the tube from excessive crank case pressures.
Anyway, I'd say there is no agreement over which way is right. I prefer mine this way because I don't want my extra emissions seperate from my primary emissions. I like it all mixed up.
I enjoyed our visit, but I noticed that you take much better care of those sophisticated machines in your shop than you do of the one under your hood. For example, I don't think you'd want me to describe here on FTE the support bracket for your 6637 air filter? I wish I'd had my camera with me. Now you'll have to post a pic of it so everyone else can see the "quality" of your MODs!
The new truck is a lot of fun to drive and mess with, but its been keeping me very busy. The list of problems is long, but all minor so far. The latest is a windshield leak that dripped water onto the dash, and through a joint all down into the instrument cluster, dash switches, and datalink connecter for my Silverleaf box. In a few weeks I'll have a new 5er, and have to start repairing all the things that go wrong with it.