CCV mod questions

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Aug 10, 2005 | 12:37 PM

EBSTEVE

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From: Everett WA

CCV mod questions

When I did the Kwik filter I noticed there was more oil in the intake than I was ok with so I want to do the CCV mod but I am somewhat concerned with it smoking or leaking oil so should it be tied into the exhaust or should I just dump it and go from there.
I have read a bit but I have not seen too much about it so any info would be appreciated.
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Aug 10, 2005 | 12:59 PM

SpringerPop

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From: La La Land

I used 18 feet of 3/4 inch Gates heater hose, and routed it all the way past my spare to a spot adjacent to my stock exhaust pipe's last bend, where it unceremoniously just "dumps".

Any "smoke" coming from that area appears normal, and I didn't have to build some elaborate venturi arrangement to get it into the pipe without backpressure valving.

Pop

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Last edited by SpringerPop; Aug 10, 2005 at 01:04 PM.

Aug 10, 2005 | 01:39 PM

Fat Diesel

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From: Morgan Hill, CA

I used one of these to tie it into the exhaust. I wasn't happy with the hose just venting to atmosphere. It was really nasty vapor. I tied it to the exhaust after the muffler and it works PERFECTLY.

http://www.jegs.com/cgi-bin/ncommerc...16&prmenbr=361

Aug 10, 2005 | 01:43 PM

Fat Diesel

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From: Morgan Hill, CA

Something is funky with the link, but if you go to Jegs.com and do a search for "e-vac" you'll see the kit listed. It doesn't need any special venturi or checkvalve or anything. The crank vents at a higher pressure than the exhaust is that close to the end of the tailpipe, so the engine does vent. It's nice because it blows the stinky stuff further away from the truck and also consolidates the emissions.

Aug 10, 2005 | 03:59 PM

slc10844

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From: Baltimore

I used the Raycor CCV kit. Costs about $230, but it mounts on the rocker cover. separates the vapor from the liquid, sends the oil back to the crankcase and the vapor goes in the original location of the air intake. It's a lot more expensive than most of the other installs, but it is one I feel comfortable with because the vapors get burned and not vented into the atmoshere.

Aug 10, 2005 | 04:55 PM

johnny8

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From: New Hampshire

Quote:

Originally Posted by SpringerPop

i'm going to extend mine back to match this setup... this will also get those fumes as far away from the cab as possible..

one question for you springer pop... couldn't you just use a pipe to duplicate the design that is in the plastic coupler pipe the ccv originally went into...? if you look at that, the inlet part on the inside of the plastic pipe is blocked off on one side so the the air coming from the filter can't flow into the ccv tube.. there is no valve to prevent backpressure... i realize this would seldom see positve pressure, but couldn't you do that in the exhaust pipe... cut a hole in the pipe, weld a tube into it, but cut a relief on one side of the tube so that when it is in the exhaust pipe the only opening in the tube faces downstream of the exhaust... even with the exhaust under pressure, the flow would still be downstream towards the tailpipe, and the flow around the pipe would still draw the fumes and oil vapor out of the pipe that was hooked to you ccv hose... any thoughts...?

Aug 10, 2005 | 05:25 PM

Fat Diesel

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From: Morgan Hill, CA

For those interested in the amount of vapor we're talking about, visit www.putfile.com and do a search on CCV or VAPOR and you'll see my CCV-VAPOR.mpg vid. I can still see the vapor in the exhaust sometimes, but it seems like less since it gets mixed into moving exhaust fumes.

You could certainly use a steel pipe and weld or braze it into the exhaust pipe. I wouldn't even worry about the venturi effect. The crank case vent has a lot of pressure behind it as you can see in the vid.

The plastic coupler between the two intake hoses, where the original CCV connected, can be replaced by a short section of 4" exhaust pipe or an appropriately sized PVC pipe. There is quite a bit of restriction in the factory black plastic piece. It's actually a great time to do the NAPA 6637 air filter since you're working right there, but that's a different post.