Provent vs. EHM - help gmctd

linewarbr · **Posted:** Mon Jul 27, 2009 12:00 pm

I've done some searches to identify a direct comparison between the two, and have come up short-handed because of the lack of filters for search results on this forum.

Understanding that the Provent maintains the negative pressure on the CCV puck while EHM does not, what could be the potential detriment of running EHM on the CRD Engine? Has anyone experienced engine problems that they can attribute to the EHM, besides the smell?

stoutdog · **Posted:** Mon Jul 27, 2009 12:58 pm

I'm not sure there is much detriment to the engine, but the fumes emitted into the atmosphere and the oil leaked onto your driveway should be bad enough...

Go with a Provent if you must. I'm going to clean out my hoses and try out the GDE tune for a couple of oil changes... A little bit of oil coating the hoses isn't a big deal, most of that will burn up anyways. It's the gunk from the combination of oil and EGR soot that you have to worry about.

gmctd · **Posted:** Mon Jul 27, 2009 2:29 pm

Cannot damage and no detriment to the engine, as billions 'n' billions (to quote Carl Sagan) of infernal combustion engines of both persuasions have run free prior to the EPA - what will hurt is the official ticket you get from the EPA indicating your vehicle was observed polluting on such'n'such street\area, and you have 10 days to rectumfy the situation or park it - as did my neighbor in his Diesel Suburban

Buy or build and install the coalescing filter cannister, which will prevent damage to the Boost hoses and filling the cac

FYI: the Provent filter media is synthetic and can be cleaned with Diesel fuel, paint thinner (not lacquer-thinner), or 'zone engine cleaner in the white'n'orange can - that and a hot-water flush will make it good as new

CRD Joe · **Posted:** Mon Jul 27, 2009 3:59 pm

Army Tanks (thank you) GM. Im going to go out and clean my Provent today....

linewarbr · **Posted:** Mon Jul 27, 2009 4:55 pm

gmctd wrote:

Cannot damage and no detriment to the engine, as billions 'n' billions (to quote Carl Sagan) of infernal combustion engines of both persuasions have run free prior to the EPA - what will hurt is the official ticket you get from the EPA indicating your vehicle was observed polluting on such'n'such street\area, and you have 10 days to rectumfy the situation or park it - as did my neighbor in his Diesel Suburban

Buy or build and install the coalescing filter cannister, which will prevent damage to the Boost hoses and filling the cac

FYI: the Provent filter media is synthetic and can be cleaned with Diesel fuel, paint thinner (not lacquer-thinner), or 'zone engine cleaner in the white'n'orange can - that and a hot-water flush will make it good as new

How does the EPA identify you as being in "non-compliance?"

gmctd · **Posted:** Mon Jul 27, 2009 5:27 pm

License number and billowing clouds of Diesel ambience.......................

KJ 119 · **Posted:** Mon Jul 27, 2009 5:34 pm

linewarbr wrote:

gmctd wrote:

Cannot damage and no detriment to the engine, as billions 'n' billions (to quote Carl Sagan) of infernal combustion engines of both persuasions have run free prior to the EPA - what will hurt is the official ticket you get from the EPA indicating your vehicle was observed polluting on such'n'such street\area, and you have 10 days to rectumfy the situation or park it - as did my neighbor in his Diesel Suburban

Buy or build and install the coalescing filter cannister, which will prevent damage to the Boost hoses and filling the cac

FYI: the Provent filter media is synthetic and can be cleaned with Diesel fuel, paint thinner (not lacquer-thinner), or 'zone engine cleaner in the white'n'orange can - that and a hot-water flush will make it good as new

How does the EPA identify you as being in "non-compliance?"

Some places actually check under the hood when issuing brake tags and such.If the guy issuing the tag is a trained mechanic,he may not issue your tag due to EPA regulation reasoning.Not likely in Louisiana,but mabe somewhere else.
Go to the old guy on Airline Hwy.He'll scratch your old one off before you put in park. :lol:

He don't check jack!

linewarbr · **Posted:** Mon Jul 27, 2009 5:49 pm

Yeah man! I put the engine cover back on and plugged in my MAF before I took it to a shop on Old Hammond Hwy in EBR for inspection. The tech opened the hood, stared at it for about 2 minutes solid, then put the sticker on and sent me on my way.

linewarbr · **Posted:** Mon Jul 27, 2009 5:51 pm

gmctd wrote:

License number and billowing clouds of Diesel ambience.......................

I wouldn't say billowing clouds, but you can see smoke in my headlights at night. I've been nervous that a cop might pull up next to me and point it out, like I might have an engine problem or something.

Cowpie1 · **Posted:** Wed Jul 29, 2009 11:55 am

That's one thing I like about Iowa, they have no vehicle emissions inspection. Still find it hard to believe that the CCV even needs to be plugged in and cannot be routed out to the open air anyway. I have an '06 semi with a Cummins ISX in it and it vents right to the open air as made by the OEM and with the blessing of the EPA. Now, it's ok to vent a 15L engine to the open air, but a little 2.8L engine, same year, has to have that nasty crankcase gases routed into the engine. Go figure.

UFO · **Posted:** Wed Jul 29, 2009 1:33 pm

I'd prefer to have all crankcases routed to the intake and all of the hydrocarbons burned. Much less pollution is produced. The big rigs and full size diesel trucks seem to still be the major contributors to the public's perception of "dirty" diesels.

gmctd · **Posted:** Wed Jul 29, 2009 1:47 pm

'07-'09's are EPA-compliant, got every kind of stifling you can imagine, as required to cross state lines - my bro drives'em cross-country east-west\north-south upper-route\lower-route and both coast routes and complains bitterly - even have the elect governor limited to 62mph and live data is logged in the tractor ECM and radioed back to headquarters via Qualcom to prevent drivers from 'cranking up the pump' - makes it difficult to maintain speed in hilly terrain, amongst other inconveniences, such as being on-schedule

grywlfbg · **Posted:** Thu Jul 30, 2009 11:49 am

I ran a Provent for about 10,000 miles and couldn't deal with the mess. It would always fill up between oil changes and I would make a mess when emptying it.

So I just did the EHM and have been very happy. Only had one random person point out the smoke to me when stopped at a red light.

Diesels don't go through emissions checks in Cali so I'm clear there. I still have the Provent so if I ever get a fix-it ticket or whatever I'll put it back in (with a larger drain hose this time) but until then EHM all the way.

BTW I don't have any spots on my driveway - only downside is the smoke from under the engine when stopped. Heck I could just run the tube all the way to the rear of the Jeep and it would just look like exhaust.

05crd · **Joined:** Wed Jun 27, 2007 2:54 pm **Posts:** 47

I was thinking of doing the provent and thought gmctd had instructions to install and drain back to the turo return or was it the crankcase, I guess I'll have to go dig some more. Do most of you provent users simply drain it with each oil change?

gmctd · **Posted:** Thu Jul 30, 2009 2:49 pm

It's considerably more complicated to plumb the drain back to the oilpan below sump-oil level as spec'ed because you cannot simply drill'n'tap the cast-alloy pan without removing the assembly to determine a suitably thick area for tapping (I've been looking for a used unit on eBay for R&D and show'n'tell, but no luck) - I counter-drilled and re-tapped one of the extra pre-tapped engine-support bosses on the block back in behind the turbo - s'posed to be below sump-oil level because cc pressure cannot easily blow the denser oil back up the drain tube - so far, my install has not caused any problem with regurgitation - pics in Haystack thread in CRD TECH section

onthehunt · **Posted:** Fri Jul 31, 2009 5:24 am

I'm running a Provent... but I wouldn't mind running Sarah Palin!!

Cowpie1 · **Posted:** Mon Aug 03, 2009 2:28 am

That is a good reason for buying your own and then you don't have the company restricting your truck speed and you can do what you want to it. I am on Qualcomm also, but my '05 Cummins in my '06 International has the EGR disabled (gained about 15% better mpg) and will run well above any posted speed limit. Also, a person can get a brand new '09 or even '10 year chassis and frame.... "glider kit". Then put in your rebuilt pre-egr engine (say.. a '98 ), tranny, rears and have a brand new truck that has no emissions junk on it and is perfectly legal in all 50 states and Canada. Emissions are tied to the year of the engine and not the truck chassis. Wouldn't it be sweet to have the same deal with autos, SUV's, and pickups? Not convinced I am right on being able to do this with a truck, then check with Fitzgerald Trucks in Kentucky and Pittsburgh Power.... they are putting together trucks just like I mentioned and doing a jam up business. Word is out and O/O are avoiding newer emissions crippled trucks. Fleets will never do it, but then they are fleets and have their own agenda. California CARB has it in place that all trucks must have DPF by 2014. No other mandates anywhere else in the country at least till 2020. But then, that gives me a good reason to continue not taking any freight to California. Haven't hauled into there since '99 and am not missing anything.

Regarding these diesels fueling public's perception of "dirty diesels"... the diesels in semi's that smoke the most are usually the EGR equipped diesels or the pre-computer engines ( pre '95 ). When the EGR routes crap back into the engine under a pull a lot of smoke is created because of the reduced temp of the burn. That is why EPA mandated Particulate Filters in the exhaust stream. By my disabling my EGR, I have hardly any smoke with far less soot buildup on exhaust stacks and I have reduced considerably my use of fuel... like nearly 3500 gallons of less fuel a year with the EGR disabled.

gmctd wrote:

'07-'09's are EPA-compliant, got every kind of stifling you can imagine, as required to cross state lines - my bro drives'em cross-country east-west\north-south upper-route\lower-route and both coast routes and complains bitterly - even have the elect governor limited to 62mph and live data is logged in the tractor ECM and radioed back to headquarters via Qualcom to prevent drivers from 'cranking up the pump' - makes it difficult to maintain speed in hilly terrain, amongst other inconveniences, such as being on-schedule

CRD Joe · **Posted:** Sat Aug 08, 2009 6:58 pm

Ok I opened the top of my provent and I dont see any element that you can remove to clean???

Joe Romas · **Posted:** Sat Aug 08, 2009 7:28 pm

CRD Joe wrote:

Ok I opened the top of my provent and I dont see any element that you can remove to clean???

Go here for a write up of the pro-vent :lol:

http://www.mann-hummel.com/group/upload ... UCmOK5.pdf

Glend · **Posted:** Sat Aug 08, 2009 10:13 pm

Typical German engineering, its so well made you would think it was one piece. Push the round ring in the middle to the side and the filter section will pop out. The entire centre section comes out. There is a large O ring around filter section that creates that seal (and the one piece look).

Provent vs. EHM - help gmctd

Who is online