Advantages of EHM Mod???

2mopar_diesels · **Posted:** Mon Jul 05, 2010 7:42 pm

I finally did the EHM after replacing the 2nd MAP sensor in less than a year on my CRD. I simply zip-tied and stuck the exit end into one of the inside frame holes. The way it vents, you don't even notice any of the common blow-by issues common to doing an EHM. I'm just wondering, other than having a clean intake stream going into the engine, is there any other benefits to doing the EHM on our little CRD's???

BVCRD · **Posted:** Mon Jul 05, 2010 8:07 pm

Now your frame won't rust.

2mopar_diesels · **Posted:** Mon Jul 05, 2010 10:25 pm

BVCRD wrote:

Now your frame won't rust.

At least the passenger side anyways......LOL!!! But seriously, is there other benefits to the engine and/or efficiency when your not blowing all that unburned oil into the intake stream??? It obviously will save the MAP sensor from burning up every 6-12months which, in and of itself is good enough a reason for me, as it cost a total of $5.78 in heater hose and zip ties and its alot cheaper than a $70 sensor.

CATCRD · **Posted:** Mon Jul 05, 2010 10:45 pm

Nope, no other benefits.

nursecosmo · **Posted:** Mon Jul 05, 2010 11:39 pm

As long as the EGR valve is dysfunctional, the CAC hose are the only thing which can be damaged by the blow-by oil. Most of the OEM hoses have already been replaced from early oil damage anyway. I tried the OEM for a short time but couldn't take the vapor. For more than 80000 thousand miles with the EGR disabled, there has been nothing but a thin coating of oil on my MAP sensor.

flman · **Posted:** Tue Jul 06, 2010 6:52 am

How about it is just OK if you like vapor fumes, how about that little bit of oil does not affect the MAP as long as the disconnected EGR is not turning it to sludge, how about that oil is acting like a detergent to clean out the sludge from the EGR previously being in use, how about the energy I get out of the oil fumes that is wasted through the $5 EHM, how about if you live in a cold climate and the end of the hose freezes shut from condensate vapors and blows the seals out of your pretty little engine :dead:

LibertyCRD · **Posted:** Tue Jul 06, 2010 7:55 am

The advantage is it keeps your engine clean without dumping a ton of cash into a ProVent. Use that cash for other mods. :mrgreen:

Joe Romas · **Posted:** Tue Jul 06, 2010 11:43 am

LibertyCRD wrote:

The advantage is it keeps your engine clean without dumping a ton of cash into a ProVent. Use that cash for other mods. :mrgreen:

With a ProVent you don't dump a ton of pollution into the air AND keep your engine stays clean

I'm not a greenie but see no down side to a properly designed closed crank breather unlike our EGR :banghead:

LibertyCRD · **Posted:** Tue Jul 06, 2010 2:05 pm

So specifically how do you clean your ProVent? What do you do with the oil in there? Do you clean it out with solvents when done draining it? Do you have to replace filters or parts in it from time to time? You have two hoses instead of my one?

So environmentally, the ProVent doesn't pollute less. It just moves the pollution from one place to another. And costs 20X more. Ah... OK. Because manufacturing plastics is such a "clean" process that it overrides the small amount of blow-by coming out of my diesel...right?

People act like EHM kills the earth, and ProVent is perfect. Truth is.. it's not.

Joe Romas · **Posted:** Tue Jul 06, 2010 2:16 pm

LibertyCRD wrote:

So specifically how do you clean your ProVent? What do you do with the oil in there? Do you clean it out with solvents when done draining it? Do you have to replace filters or parts in it from time to time? You have two hoses instead of my one?

So environmentally, the ProVent doesn't pollute less. It just moves the pollution from one place to another. And costs 20X more. Ah... OK. Because manufacturing plastics is such a "clean" process that it overrides the small amount of blow-by coming out of my diesel...right?

People act like EHM kills the earth, and ProVent is perfect. Truth is.. it's not.

Nothing is perfect but my ProVent is a better solution then your elephant hose that's not doing any good to the earth :SOMBRERO:

Actually there's a supprisingly small amount of oil to collect and it drains out the bottom. I have a plastic line attatched with a valve at the end to drain it. I'm not lazy and wiping it out while doing a oil change is very simple and no solvents are needed. I drain the oil into my used oil bottle and return it for recycling.
Oil is not the problem unless you don't like it on your driveway. The cumbustion gasses just plain stink. If you can't smell them the person behind you can :furious:

Cowpie1 · **Posted:** Tue Jul 06, 2010 3:38 pm

flman wrote:

how about if you live in a cold climate and the end of the hose freezes shut from condensate vapors and blows the seals out of your pretty little engine :dead:

Do you have proof of this ever happening? I have had the EHM done on my CRD since it's first 500 miles. The 2006 Cummins ISX 15L in my semi has had a similar setup from the factory with the blessing of the EPA. Both have operated in climates down to -30F and have never experience a freeze up that you imply. And I think the engine in my semi, which costs more than a brand new Jeep Liberty CRD, wouldn't have the CCV routed to below the oil pan by the original manufacturer if there was an issue. As a matter of fact, there are over 3 million commercial trucks operating in the U.S. and I have never heard of one time that the CCV hose routed down to the frame has frozen up. Clogged, yes. Frozen, no. 575,000 miles on my Cummins engine now and narry a problem. And guess what? The 3/4" hose I used for the CRD is the same dimension as the one on the Cummins.

Cowpie1 · **Posted:** Tue Jul 06, 2010 3:50 pm

Joe Romas wrote:

LibertyCRD wrote:

The advantage is it keeps your engine clean without dumping a ton of cash into a ProVent. Use that cash for other mods. :mrgreen:

With a ProVent you don't dump a ton of pollution into the air AND keep your engine stays clean

I'm not a greenie but see no down side to a properly designed closed crank breather unlike our EGR :banghead:

We that do not have the provent dump a ton of pollution in the air? Let's get a perspective here....

11,000 Liberty CRD's made, fewer than that on the road, and only a handful of ones on the road have the EHM

3 million commercial trucks operating in the U.S. The vast majority of these have a factory installed "EHM" with the blessing of the EPA. Those trucks cover an average 100,000 miles per year, per truck with an average mpg of 6.

I am all choked up that my 2.8L VM diesel, which get an average mpg of 26, and covers, maybe, 20,000 miles a year has the same EHM as all those 13L, 14L, and 15L commercial engines.

I have no problem with those that choose the Provent or similar route. Great for them. It is when they come off with an air of superiority that presses my buttons. As if the EPA is the all knowing protector of the environment. They are just government beaurocrats promoting their own game to get more control and funding. The regulations they put in place are no where near realistic. Especially when they mandate my 2006 VM diesel has to have a routed CCV, yet every commercial engine manufactured thru 2007 was not required to have the same routed system. I just replaced the factory installed EHM hose on my 2006 Cummins ISX.

Oh well....

mackruss · **Posted:** Sat Jul 10, 2010 9:39 am

2mopar_diesels wrote:

I finally did the EHM after replacing the 2nd MAP sensor in less than a year on my CRD. I simply zip-tied and stuck the exit end into one of the inside frame holes. The way it vents, you don't even notice any of the common blow-by issues common to doing an EHM. I'm just wondering, other than having a clean intake stream going into the engine, is there any other benefits to doing the EHM on our little CRD's???

Yes there is, you won't get blowby vapour oil clogging your CAC hoses and intercooler :BANANA:

2mopar_diesels · **Posted:** Sat Jul 10, 2010 9:53 am

So far, so good! Don't really have any ccv vapors to speak of, but it is the heat of summer, and only time will tell this winter ad to whether or not I continue this mod.

flman · **Posted:** Sat Jul 10, 2010 2:55 pm

Cowpie1 wrote:

flman wrote:

how about if you live in a cold climate and the end of the hose freezes shut from condensate vapors and blows the seals out of your pretty little engine :dead:

Do you have proof of this ever happening? I have had the EHM done on my CRD since it's first 500 miles. The 2006 Cummins ISX 15L in my semi has had a similar setup from the factory with the blessing of the EPA. Both have operated in climates down to -30F and have never experience a freeze up that you imply. And I think the engine in my semi, which costs more than a brand new Jeep Liberty CRD, wouldn't have the CCV routed to below the oil pan by the original manufacturer if there was an issue. As a matter of fact, there are over 3 million commercial trucks operating in the U.S. and I have never heard of one time that the CCV hose routed down to the frame has frozen up. Clogged, yes. Frozen, no. 575,000 miles on my Cummins engine now and narry a problem. And guess what? The 3/4" hose I used for the CRD is the same dimension as the one on the Cummins.

My Cummins has a factory vent tube in the front of the engine, where it is warmed by the fan and it vents mid way down the center of the engine, not below the frame in the wind chill. If you wanna take a chance with a jimmy rigged EHM go ahead, I just don't want to be the one to recommend this to another CRD owner and have them be the first to have the long, non conductive, non engineered mod, blow the seals out of their engine. I like my maintenance free CCV see my sig.

No, I have no proof, maybe you can be the 1st? :ALONE:

Here is some other cases:
http://www.sacskyranch.com/eng3.htm
http://www.recalls.gov.au/content/item. ... lletin.pdf
http://avstop.com/technical/moutain/5.htm (see oil breather)
http://www.autoblog.com/2009/10/13/kick ... over-cold/
http://www.machschnell.com/bmw_oil_change_service.htm
http://www.faqs.org/patents/app/20100050962

KJ 119 · **Posted:** Sat Jul 10, 2010 9:36 pm

LibertyCRD wrote:

The advantage is it keeps your engine clean without dumping a ton of cash into a ProVent. Use that cash for other mods. :mrgreen:

Ton of cash?????129.99 :ROTFL:

Probably the best money spent on a CRD.

danoid · **Posted:** Sun Jul 11, 2010 11:47 am

flman wrote:

How about if you live in a cold climate and the end of the hose freezes shut from condensate vapors and blows the seals out of your pretty little engine :dead:

That what's stopping me from messing with a system that doesn't appear to have problems.

BVCRD · **Posted:** Sun Jul 11, 2010 11:50 am

danoid wrote:

flman wrote:

How about if you live in a cold climate and the end of the hose freezes shut from condensate vapors and blows the seals out of your pretty little engine :dead:

That what's stopping me from messing with a system that doesn't appear to have problems.

Yep. Back in the day, Old Navy's froze up in Missouri.

flman · **Posted:** Sun Jul 11, 2010 12:16 pm

BVCRD wrote:

Yep. Back in the day, Old Navy's froze up in Missouri.

Thank you.

BTW, where is Old Navy, did he go back to TDI's?

Joe Romas · **Posted:** Sun Jul 11, 2010 4:45 pm

flman wrote:

BTW, where is Old Navy, did he go back to TDI's?

MB's

Advantages of EHM Mod???

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