PROVENT vs ELEPHANT HOSE

shadow63 · **Joined:** Wed Mar 07, 2012 12:04 am **Posts:** 208

Does the provent put out all that smoke like the elephant hose mod. at idol like at a red light I hate all the smoke that comes up from under my crd from the hose.

user113 · **Posted:** Fri Apr 20, 2012 10:29 pm

The point of the EHM is to keep the oil and soot (from the EGR system) coming out of your crankcase from getting "recirculated" back into engine. This is done by dumping it out through the elephant hose. The blow-by has to all go somewhere, so it comes out from under your CRD.

The point of the ProVent is to remove the oil, soot and water mist from the blow-by before you recirculate it back through the intake manifold. Of course, you could use the ProVent to separate the oil, soot and water and still dump it under the car, but most people, once they have cleaned up the stream just recirculate it, and therefore don't end up breathing it at stoplights.

I have seen where somebody installed a venturi tube in their exhaust system and connected their elephant hose to it, thus sucking the blow-by out through the tailpipe, but that seems like a lot of work to me. I just went with the GDE tune which significantly reduces the soot going through the system, and just let the oil and water back through. Great excuse to get the GDE tune of your choice.

shadow63 · **Joined:** Wed Mar 07, 2012 12:04 am **Posts:** 208

After I get a GDE tune should I keep the elephant hose mod or should I reconnect it back to stock? Thanks

VMKJCRD · **Posted:** Sat Apr 21, 2012 12:15 pm

Gde tune will not stop the ccv fumes. Its something you'll have to live with. If u don't like the ehm your next option is a provent. They're around 170esh and you have to buy a filter every year.

ATXKJ · **Posted:** Sat Apr 21, 2012 6:27 pm

I tried the EHM - stinks too much.

I haven't bought a new filter for my Provent yet- it's not really a filter - it's more of a condensation grid - just something to slow down the air flow and the oil with condense out.

That said - if I needed on now I don't know that I'd buy a Provent - probably make one.

like the TDIGUY's or so

http://www.lostjeeps.com/forum/phpBB3/viewtopic.php?f=5&t=27130&start=0

http://www.angelfire.com/space/neon/catchcan.html[/quote]

user113 · **Posted:** Sat Apr 21, 2012 7:37 pm

Because the GDE Tune reduces the opening of the EGR valve, there is very little soot getting added into the intake manifold, and so I just use the stock CCV system. Its up to you. Just check your MAP sensor periodically.

http://www.greendieselengineering.com/g ... =jeepIssue

http://www.dieselpowermag.com/tech/1110 ... fications/

http://www.altorfer.com/news/oilanalysis.shtml

warp2diesel · **Posted:** Sat Apr 21, 2012 9:47 pm

A piece of exhaust gasket material from NAPA placed between the EGR pipe and the EGR valve gets rid of all the soot. As does SEGR or ORM. I figure why settle for 10%+ soot going back into your intake when you can have ZERO%.

For the CCV I use a version of the TDI guy's oil separator.

There is a 3/8" drain line going back to the sump.
BTW the CCV does not emit soot, soot comes from the EGR.

hucorey · **Joined:** Tue Mar 06, 2012 4:29 am **Posts:** 378

user113 wrote:

Because the GDE Tune reduces the opening of the EGR valve, there is very little soot getting added into the intake manifold, and so I just use the stock CCV system. Its up to you. Just check your MAP sensor periodically.

http://www.greendieselengineering.com/g ... =jeepIssue

http://www.dieselpowermag.com/tech/1110 ... fications/

http://www.altorfer.com/news/oilanalysis.shtml

Actially, Keith from GDE told me that their tunes delete the EGR, so there is no soot getting into your intake. He just made a similar post in the last SEGR thread. Here is part of the actual quote from Keith in response from an email I sent him.

"The EGR is turned into a paperweight with all our tunes, so no need to do anything with the EGR valve. The engine oil soot loading is reduced by 90% and the oil remains much cleaner to allow for extended oil change intervals. We also remap the injection timing, boost and fuel pressure to optimize cruising fuel economy, so even with the HOT tune you will still see an increase in fuel economy unless driving very aggressively."

fastring · **Posted:** Sun Apr 22, 2012 11:19 am

I did the GDE tune first. Just last month, I did the EHM. There is still a ton of "stuff" coming out the EHM, even with the GDE ECO tune. I dont know if its soot or just oily air or what, but its not what you would want going into your intake. I route behind the rear tire near the exhaust. Its like a mini muffler but smells worse. The amount of black coming out the back is much more than before the EHM.

My point is that the GDE tune is great, but I still would want either EHM or a provent.

papaindigo · **Posted:** Sun Apr 22, 2012 11:54 am

hucorey and fastring - you are talking 2 somewhat separate things if I have the plumbing right at least in an accurate if simplistic way.

The EHM with or without a provent or equivalent deals with oily vapor from the CCV (the hockey puck on top of the engine) which in the OEM system is dumped into the airbox to turbo hose just in front of the turbo and then thru the turbo>intercooler>engine hoses and on into the air intake manifold except when the EGR bypasses some of it to the exhaust manifold. The primary purpose of the EHM is to intercept that oily vapor which helps the life of the airbox to turbo hose and indirectly minimizes oily vapor getting to the EGR (yes I know the vent to ground version prevents the CCV being a source of oily vapor to the EGR). The GDE tune does nothing for the CCV's production of oily vapor.

The GDE tune, among other things, minimizes or eliminates (pick your terminology) EGR function and hence the amount of "stuff" diverted thru the EGR to the exhaust manifold. The GDE tune will do nothing to minimize the amount of oily vapor coming out of the CCV via an EHM. NOTE the SEGR does less, overall for the engine than the GDE tune, but it does completely shut down the EGR.

Bottom line if you want to minimize oily vapor into the system from the CCV then go with the EHM with or without a provent or equivalent and if you want to eliminate EGR induced problems IMHO the best choice is a GDE tune although the SEGR will do and is a bit cheaper. If you want to accomplish both goals then do both things.

hucorey · **Joined:** Tue Mar 06, 2012 4:29 am **Posts:** 378

papaindigo wrote:

hucorey and fastring - you are talking 2 somewhat separate things if I have the plumbing right at least in an accurate if simplistic way.

The EHM with or without a provent or equivalent deals with oily vapor from the CCV (the hockey puck on top of the engine) which in the OEM system is dumped into the airbox to turbo hose just in front of the turbo and then thru the turbo>intercooler>engine hoses and on into the air intake manifold except when the EGR bypasses some of it to the exhaust manifold. The primary purpose of the EHM is to intercept that oily vapor which helps the life of the airbox to turbo hose and indirectly minimizes oily vapor getting to the EGR (yes I know the vent to ground version prevents the CCV being a source of oily vapor to the EGR). The GDE tune does nothing for the CCV's production of oily vapor.

The GDE tune, among other things, minimizes or eliminates (pick your terminology) EGR function and hence the amount of "stuff" diverted thru the EGR to the exhaust manifold. The GDE tune will do nothing to minimize the amount of oily vapor coming out of the CCV via an EHM. NOTE the SEGR does less, overall for the engine than the GDE tune, but it does completely shut down the EGR.

Bottom line if you want to minimize oily vapor into the system from the CCV then go with the EHM with or without a provent or equivalent and if you want to eliminate EGR induced problems IMHO the best choice is a GDE tune although the SEGR will do and is a bit cheaper. If you want to accomplish both goals then do both things.

Completely agree with you on that. I was just assuming the EHM was already done.

DOC4444 · **Posted:** Mon Apr 23, 2012 6:53 am

GDE and or SEGR do NOTHING for the excessive crankcase pressures these rigs run with the stock CCV. You will eventually blow the rear main and/or other seals if you don't reduce the pressure one way or another. (My rear main blew at 17K.)

DOC

turbobill · **Posted:** Mon Apr 23, 2012 12:10 pm

If you are concerned about the environmental impact of EHM, run a Provent system in line before the to atmosphere. There are lots of good, cheap PVC pipe models on the Forum. I use a long piece of hydraulic hose to plumb the EMH to the rear of the car, just remember that you do not want to build an oil trap in the plumbing as there should be about 1/4 cup of oil per 6000 miles coming through the system. that needs to drain. The issue of Crankcase over pressure is then dealt with. Another note, do not clamp the hose to the crank case vent port, just push the hose on. If there is a pressure build up it will pop off the hose connect and vent the pressure.

papaindigo · **Posted:** Mon Apr 23, 2012 12:59 pm

There really shouldn't be any crankcase overpressure problem unless the CCV fails to open or the passage from the CCV is blocked by like a Provent that freezes up in the way north winter.

Dennis MacGyver · **Posted:** Tue Jul 24, 2012 3:23 pm

Question about the hose routing. Currently in factory position, the hose vents into intake line (hose) just before the turbo, what about the possibility of having the hose connect to the air box BEFORE the air filter ? I have a 1985 BMW 524td and that is how the crank case ventilation system "disposes" of the oily gases, PRE air filter.

The major difference is this would route the gases pre air filter and most of my concern pre MAF. I've used a K&N filter (itself an oil soaked filter) on the 524td for years.

With this routing, how long do you think it would take to effect the MAF sensor or do you think it would effect the MAF at all?

Dennis

striperman36 · **Posted:** Tue Jul 24, 2012 3:29 pm

CHOOCHOOMAN74 did the benz cyclonic. seems interesting solution.

PROVENT vs ELEPHANT HOSE

Who is online