Do all of the new lly motors use Exhaust Gas Recirculation? If so is this somthing to worry about? I hear egr is not good? What should I do, go get 04 lb7 or lly? Sorry if this is a reoccuring post but I couldn't get any info out of a seach!http://www.dieselplace.com/forum/smileys/Cry.gif Edited by: TheMNkid

All the LLY's have EGR and CAT's.

Thanks for the reply! What do you guys think of EGR? Will it cause the engine life of the durmax to go down? Your replys are appreciated! This will help me make some decisions on what to buy! Thanks!

It means much cleaner emissions. It means much harder performance modifications. As far as engine longjevity, all modern gas motors have these systems in place and have more logjevity than ever before. I do not really see EGR being a factor in logjevity. EGR Exaust gas recirculation. A small amount of your exuast is redirected and reburned. A normal 4 cycle engine does this naturally every time it goes around. Catalytic converter. A device that gives unburnt exaust gas a chance to further combust. No longjevity issues there. The only real issue is the fuel just isn't what it used to be. Edited by: Bronco

It may have a factor on longevity as the oily/sooty exhaust re-enters and over time makes everything it contacts oily and gummy. I've done injector pumps on both the C & J type 6.2s. Intake manifolds and ports on the Js, (no EGR) were immaculate. The C (w/EGR) was a mess. My 03 D/A has EGR and I wish it didn't. http://www.dieselplace.com/forum/smileys/Ermm.gif

Thanks for that websters dictionary explenation Bronco! Thats what I'm talkin about, a real answer! This EGR is not good! Hey Trip, is there anyway around this, should I get a used duramax w/o egr, what should I do?

Catalytic converter is also a restriction, leading to higher egt's.

I havn't seen a new dmax but don't you think it could easily be cut out and relaced with a section of pipe? or not? And as for thr dirty internals caused by EGR, can a cleaner be sprayed into the manifold to clean that up?

Catyltic converters are sized to properly match the amount of exaust exiting a stock motor.They only become a restriction if you increase engine performance. There is always such a thing as a high performance aftermarket cat.

Which is the goal of most of the users here, to increase performance! Why would I stick a bigger cat on when increaseing horsepower? Why wouldn't I just cut it off and bypass it? I think that would be the most cost effective solution to open up the exhaust to accomadate hp! Sorry, I'm not trying to pick a bone. I just wouldn't want to get an lly and find out that I couldn't do anything to it or its not going to last as long as a diesel should! I'm just trying to get some info on what could be done with these new tree hugging friendly engines.

Will the egr on the LLY cause intake plugging? I know it is a big problem on the VW TDI's but they also have ccv valves. I've some pictures of plugged intakes and it is pretty nasty. Just one more problem to deal with.http://www.dieselplace.com/forum/smileys/Ermm.gif

Also will propane added to these new systems take away some of the plugging because of a better burn?

what I want to know is how to disable the EGR as all the VW TDI's that have EGR and oil from the CCV have sooty buildup in the intakes. My VW had a badly built up intake with only 30K miles on it. And the other thing is the oil turns sooty black in only a few hundred miles vs. my Duramax stays pretty clean for a LOT longer.


On the VW's there are several guys that have either by computer disabled the EGR or found other ways to eliminate the sludge buildup in the intake.


www.tdiclub.com (http://www.tdiclub.com) is the website for all the VW diesel freaks out there...


my .02 is that we figure out a way to eliminate this problem with the Duramax...

I have neve looked to see if I have a EGR valve on my Dmax. I do know that at 5K miles my oil looks really bad. Where should I look to see if the valve is in place? I know for a fact the truck did not come with a cat.

How to check for a CAT & EGR! Qoute from OC_DMAX out of a forum "There are essentially two emission packages for 2002 - 2003. The Federal emission package does not have a CAT or EGR. The California Emission package has a CAT/EGR. Some states in the Northeast require the CA package.

You can check your truck really easy. For the CAT, look under the passenger side of the vehicle. You will see the muffler which is large and about 30 inches in length near the rear axle. If you see another large item between the muffler and the engine downpipe, then you have a CAT. Yes it is a big round device before the muffler. If you have the CAT, then you also have an EGR system on the engine. To check for the EGR, look for the following:

A whole bunch of vacuum lines attached on top the fuel filter assembly, immediately above the primer pump.

In the engine, between the turbo and passenger side valve cover, there will be a cylinder like object about 12 inches long with a vacuum solenoid on one end. This is the EGR exhaust gas cooler.

Look way below the alternator. If you see another device being powered by the fan belt, it is the vacuum pump. This device is also only on EGR equipped vehicles."

I have no cat or air pump. The item by the turbo, are you talking about the wastegate?


ONEDIT: There is the wastegate valve by the turbo. Therre is no EGR valve or vacum lines by the fuel filter. To bad that is not a guarantee of no problems.http://www.dieselplace.com/forum/smileys/Cry.gifEdited by: Bronco

What I heard is that the EGR works at idle and then shuts off when you gas it. Mine has one and I'd like to get rid of it but to my knowledge there's no easy way.

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HEY MOTO HEAD,


I just checked my 04 LB7, Massachusettshttp://www.dieselplace.com/forum/smileys/Dead.gif, and it seems that the CA. emissions are needed here as I have that big ugly CAT before my muffler. I saw that you posted the BANKS SIX WITH LOADER, and am wondering what you are seeing for egt's (or if not seen on a gauge, then how the program is working with your cat and egr?)


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Any Deisel Techs out there that have a take on this issue that they would like to share?

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Just talked to a BANKS Tech about how my LB7 with CAT &amp; EGR would work with the six gun &amp; speed loader. He said that with the new exhaust (MONSTER ELIMINATES THE CAT). the program works fine. I also asked about the EGR and if it was affected by eliminating the CAT. He said it was not and that having the EGR was not that big a deal. He also stated that the CAT can be put back on in 20 minutes (to pass emissions). http://www.dieselplace.com/forum/smileys/Approve.gif


ANYONE?


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Thanks for the info Jeff I really appreciate it! Does anyone have any confirmation on the EGR just working when the truck is idleing? Thanks for replies!

If you connect a Tech 2, go into the Diag section, EGR you can watch it go on and off. from what i've seen it is on at idle and low cruising speed and it seems to turn off when you gas it. also i don't belive its on until the engine gets warm.

So where does the exhaust re-enter the system? Curious of where the deposites will start building up! Thanks for the post Diesel Power!Edited by: TheMNkid

So where does the exhaust re-enter the system? Curious of where the deposites will start building up! Thanks for the post Diesel Power!


Cooled exhaust gases are returned at the turbo outlet. Buildup of carbon "gunk" will be: intake manifold, heads, intake runners, intake valves. The most critical parameter in diesel lubrication is control/reduction of abrasive soot contamination. EGR is "mainlining" sooty exhaust right back into the injection side of the heads and cylinders and definitely increases the rate and concentration of soot buildup in the engine oil. We also fight like crazy to maintain clean intake air and then EGR short circuits abrasive exhaust gases into the intake behind the air filter.


Glad my 2001 LB7 is cat and EGR free!http://www.dieselplace.com/forum/smileys/Big Smile.gif

Anybody know of somthing that can be done about this buildup?

yup lets here it what can we do?

Could this be an option to keep the parts clean? Just an idea! http://www.amsoil.com/products/apf.html

I don't know i'd rather disable it my self!!

HEY! The only real fix to eliminate the sludge buildup is to eliminate one of the two components... Soot or Oil...


The guys over at the VW TDI page have the answers, and I'm hoping with the amount of brainpower here we can do the same for the Duramax! There are guys that have put on a nice filter setup to keep the oil from the CCV from gettin into the intake, and there are those that have either disabled or removed the EGR from the engine to clean it up.


http://pics.tdiclub.com/data/516/7426intake_before_2-med.jpg (http://pics.tdiclub.com/showphoto.php?photo=1705&amp;size=big&amp;password=&amp;sort=1 &amp;cat=516)


There's a pic of a clogged up VW EGR valve for ya... check it out if you want at www.tdiclub.com (http://www.tdiclub.com)

here's another good one for you to look at...


I don't have the answer, I just want to stir up those of you that might have a solution for the EGR problem we really have here...


http://pics.tdiclub.com/data/503/17954MVC-026S-med.jpg (http://pics.tdiclub.com/showphoto.php?photo=7530&amp;size=big&amp;password=&amp;sort=1 &amp;cat=503)


Personally, I would prefer to simply disable the EGR, as the engine will run cleaner internally...

Sorry, Newguy, but your links are "busted" and if you try and open the link you get a "must be a registered user to view."

Bummer - I'll have to see if I can figure out a way to get those nasty clogged intake pics over here for you all to see... http://www.dieselplace.com/forum/smileys/Confused.gif

You could save them to your hard drive then upload the here using the picture upload button.

Workin on the pics guys! I wish somebody could rig up a switch for the egr! On when your at the dealer and off all other times!Edited by: TheMNkid

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A stock '01 head pipe has no cat and bolts right up to 02,03,and early model 04. Have had one on my 03 since new, Got no info as far as egr stuff. Later.








Robert

Hello out here! Hey, is this post worth me gimping it along? I really want info on this topic and I can't get it off the net so this is where I turned. But it seems like none of you high posting members and/or techs have no intrest and/or comments about this subject ! Why is that?Edited by: TheMNkid

Hello out here! Hey, is this post worth me gimping it along? I really want info on this topic and I can't get it off the net so this is where I turned. But it seems like none of you high posting members and/or techs have no intrest and/or comments about this subject ! Why is that?


Well, sorry that we haven't met your "expectations" on the volume and quality of the information that we have tried to supply. Your entire purchase price has been fully refunded. Have a nice day.http://www.dieselplace.com/forum/smileys/Evil Smile.gif

Hey "TheMNkid" thanks for getting those pics to work for the board here... I ran out of time yesterday to work on it. I'm also here in MN... so maybe once we find out how to get rid of this problem we can tackle it togther?


Anyhow, thanks in advance to all who are contributing to this worthy cause. http://www.dieselplace.com/forum/smileys/Big Smile.gif

The simplest, though hardly popular around here, solution would be to buy a Ram with a Cummins "600", as that engine is alone in not using EGR to meet 2004.5 emissions regulations. As an added bonus you get 15 extra HP, 10 lb-ft extra torque, an extra 2 years of engine warranty (7yr/100K) and an extra 34,000 miles of transmission warranty (7yr/70K).





I'm not disappointed with my 2002 D-max, but if it burns down before I get home tonight its replacement is going to be brand D.

I would guess that as most of us do not have a cat or EGR on our trucks, we really don't have much to offer in the way of a solution ......... YET. I'm sure that as more 04 trucks hit the roadways, this issue will be addressed in due time.


That EGR valve looks bad http://www.dieselplace.com/forum/smileys/Dead.gif

There is no simple solution, as the EGR system is designed-in to the engine and not simply an external bolt-on. There are usually exhaust passages in the head as well as the coolant plumbing for the cooler. The system is also deeply embedded in the emissions controls programming and is monitored by the computers for performance so that it is electronically "missed" if bypassed or defeated. There is no quick and simple "magic bullet" for defeating the system - it is not a hubcap. My 2001 LB7 does not have it. I had EGR on my 99 6.5TD Tahoe and had to "bite the bullet" and eat the grit - no cost-effective or easy way to defeat. I have no experience with a California LB7 so can't help there. There are darn few LLYs in the system for anyone to examine and evaluate, so it will take time - if feasible at all, but don't get your hopes up.

hmmmm, very true posts... we will have to get some of these units on the road to really evaluate.


Maybe we could get Dmaxallitech to help us out?? http://www.dieselplace.com/forum/smileys/Big Smile.gif http://www.dieselplace.com/forum/smileys/Big Smile.gif


Or we could just stuff a sock in the valve, right?

Somebody said this thing goes on and off, well as I understand it goes on when the combustion chamber becomes hot (hot being a tempreture I don't know). Because when the chamber gets to hot oxygen and nitrogen combine chemically and thats what causes smog! I don't know if this process occures under high load situations because it would kill power! Nothing here is for sure its just me putting one thing and another together! Still digging up info! Hey did you guys know that the dmax is computer retarded to produce less hp during the 8,000 mile break in period programmed into the computer?