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Old 05-29-2010, 08:00 AM
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Considering "elephant hose mod"

After a year of wrangling with my Racor and having it work only about 60% of the time (up to about 50mph before filter bypass kicks in) & being annoyed by having to spend and hour removing and then reinstalling it when it goes to the dealer for service, I've decided to look into the "EHM" as they call it in the KJ CRD world.

Have spoken with a few diesel techs and truck owners they all do some form of the mod.

It's very simple. Run a hose from the crank case breather beneath the vehicle and plug the hole where the breather is supposed to attach to the air intake. Total cost? About $20.

Downsides? Less environmentally friendly. Blow by oil mist sprayed on the ground, driveway and underside of vehicle.

Upsides? Cheap. 100% effective. Takes 10 mintues to install and remove. No concerns about excess pressure building up in crank case. I will be running a 1" hose about 3 feet in length beneath the vehicle.

Here's my questions? What is the plug with the wire running into it where the CCV hose joins with the air intake tube? I believe I've seen it referred to as the "inline heater". What is it's purpose? Will I throw a code when I cap one end of the the plug? Has any one done this with success?
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Old 05-29-2010, 10:04 AM
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Re: Considering "elephant hose mod"

Well there goes the neighbourhood...and to think I was gonna buy the Racor too... reading your post jsut discouraged the heck outta me.... As an aside, I checked a buddyof mine's jeep who has the same orange intake seal I do, and he has zero oil present. His km total is almost the same as mine. So go fiure... I will watch with interest what you end up doing....
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Old 05-30-2010, 08:05 PM
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Re: Considering "elephant hose mod"

Well, finished it today. Amazingly simple. From the CCV breather, I ran 3 inches of 1" hose (I've called it the PCV valve before but the diesel tech that worked on my car this week corrected me and said that diesels don't have PCV valves, they are referred to as CCV breathers. He tried to explain the difference. Way over my head). I then flipped the heat sensing element (I think that's what it is) upside down so the wires could reach the shorter hose. I wanted to run the wire under the fuel rail but the plug is too big to run under it. It has insulation on it anyway and I don't think the fuel rail gets too hot. Make sure air is passing thru the "T" shaped heat sensor in the right direction. There's an arrow on it, to show air flow direction. I the added a premolded 180 degree "U" to send the CCV hose downward. I ran it down behind the passenger side front wheel well and thru a perfect hole in the bottom of the unibody that holds it still. A zip tie or two and done. Found an expanding plug to plug the hole in the air intake tube. Too perfect. No codes yet. No major spray yet. I'll keep y'all posted... Pics to come...
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Old 05-31-2010, 07:04 AM
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Re: Considering "elephant hose mod"

pics...
Attached Images
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Old 05-31-2010, 09:18 AM
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Re: Considering "elephant hose mod"

the setup looks good, my father inlaw was going to do the same but he was going have the hose sit in a glass or stainless container instead of vent to the ground. my brother's 2001 stock duramax just vents to the ground like your setup. watch your hose is not close to the DPF, wouldn't want a fire.
I'm changing my racor filter over to a k&n because I've noticed some oil still getting to the turbo even with the racor, just keeping the racor housing. I will post pics of my setup once I've finished it.
I guess you can't install your engine cover?
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Old 05-31-2010, 08:27 PM
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Re: Considering "elephant hose mod"

No the breather hose gets in the way. I'll keep you posted on how this goes. Plan to check the intake in a week or so. I assume there's some oil still in the system that needs to run thru and be burned up. I figure a week or so should recirculate and burn up anything built up in the intercooler and turbo resonator.
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Old 06-01-2010, 08:12 PM
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Here's an album-pics scrambled but you get the idea

http://s875.photobucket.com/albums/a...%20Hose%20Mod/
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Old 06-02-2010, 11:06 AM
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Re: Considering "elephant hose mod"

Quote:
Originally Posted by CRD Dawg View Post
I assume there's some oil still in the system that needs to run thru and be burned up. I figure a week or so should recirculate and burn up anything built up in the intercooler and turbo resonator.
my guess is that the oil in the intercooler and turbo resonator and intake manifold never burns up. those components will always have some oil residue and in some cases EGR soot mixed in making a gooey mess. the only way to fix it all is to disassemble and clean.
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Old 06-03-2010, 05:33 AM
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Re: Considering "elephant hose mod"

Quote:
Originally Posted by suzieque View Post
my guess is that the oil in the intercooler and turbo resonator and intake manifold never burns up. those components will always have some oil residue and in some cases EGR soot mixed in making a gooey mess. the only way to fix it all is to disassemble and clean.
I was hoping that once I finally stopped adding to it, what had accumulated would eventually be recirculated and burned off.
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Old 06-09-2010, 07:47 AM
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Re: Considering "elephant hose mod"

Well, I've put about 500 miles since setup with no codes. I've seen this done on heavy duty diesel trucks before and they sprayed out a dark black mist that coated the underside of the vehicle and dripped oil on the ground. That's what I was expecting and that's why I didn't do it sooner.

I shortened the hose to about 4 inches beneath the vehicle from the pics I took. No spray anywhere. None on the underside. None in my parking spot. No black drips. All that comes out is a tiny bit if clear "steam" when cold, then once at operating temp., the blowby turns a more white color, and is flowing probably 5 times more and smells much stronger.

Can only smell it in the cabin when at operating temp, A/C blowing, and sitting at a stop light for several minutes but it's minimal. When in motion no smell. You can smell it very easily outside the vehicle, though.

Hope these are all good signs/symptoms. I'm a little concerned that the blowby is somewhat white in color. No drips is good, I guess. I wonder if the heater hose is absorbing some of the oil mist since it is not oil rated hose? I imagine it is. I opened up the setup after a few days and the hoses aren't dissolving yet. They eventually will though. I hope to replace the hose soon with hydraulic hose. I just used what I already had laying around from previous attempts with the Racor. I estimate this cost about $20 for the parts used. With proper hydraulic hose the cost would double, I'm sure. Don't know where I'll find the pre-molded 180 degree U-bend I'll need either, in hydraulic hose.
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Old 08-08-2011, 01:50 AM
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Re: Considering "elephant hose mod"

Can you just run the hose to some sort of catch can as susieq suggested? Maybe you could eliminate some of the smell.
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Old 10-24-2011, 02:13 PM
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Re: Considering "elephant hose mod"

I have just finished my replacement of a swirl motor @ 76,000 miles and would prefer to not do this again. Does anyone know if the elephant hose modification really does fix all of this?
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