Block the EGR on new Cummins?!

[FL70CAT]

Will there be a way to block the EGR on the new Common rail Cummins??

Besides EGR hurting fuel mileage and compression ring longevity it would probably clog the intake like some other EGR equipped diesels are experiencing... ...

 

[Boldt's Wagon]

Buy one before Jan 2004. the 2003 and early 2004 models will not have EGR.

 

[lschultz]

The other EGR equipped diesels are experiencing! Would that be the VW TDI?

 

[Peter Campbell]

Look at the site www.tdiclub.com the new diesels ( one of which I just bought) seem to have problems with "clogging" of the intake manifold. Crancase gasses in the intake and EGR ( unfiltered??) make an oily sooty mess. There are "fixes" which I will aplly as soon as I take delivery. I have just lurked on the site for a couple of days. This is what the dodge owners will most likely be dealing with in 2004. 5 models. Hope to have enough money for a 2004 (2003 production)

 

[Texas Diesel]

Funny you ask, my 95 Dodge has had a . 22 shell stuck in the vacuum line to the EGR valve since 30k, now has 180k. Wonder if a 2004 CTD could have the same "problem"??

 

[Motorhead]

Blocking EGR

More than likely you would set a trouble code if you blocked it off. I have a couple of '80s MBZ turbo diesels and I blocked the EGR off right away. They sure ran better after!

 

[Shooter]

Originally posted by lschultz

The other EGR equipped diesels are experiencing! Would that be the VW TDI?

The first diesel I personaly know of the egr plugging the intake w/ oil residue & soot was the 78 - 83 Olds 350 diesels. I had seen some you could not get a 30 cal bullet through. After the soot gets cooked it turns into coke and has to be chisled out of the manifold and head intake runners and bowls

 

[Andy Perreault]

Will an exhaust brake work with the EGR?

Andy

 

[KCJackson]

Originally posted by Shooter





The first diesel I personaly know of the egr plugging the intake w/ oil residue & soot was the 78 - 83 Olds 350 diesels.

You really consider the Olds 350 a suitable diesel for analysis of ANYTHING?

 

[obert]

AMEN TO THAT KCJACKSON!!

 

[dmurdock]

Judging from past experience, I'm sure it'll be about 2 weeks before the "standard" method of plugging the EGR is established. And then, of course, another 3 weeks before a "box" which will prevent the code from being set will be released. I'm sure gordon is already working on it...

 

[Bill Stockard]

The Olds diesels had Positive Crankcase Ventilation on them too. This is where most of the oil, caking, and crud came from. The IH/Ford 6. 9L and 7. 3L diesels had Positive Crankcase Ventilation on them too which created a lot of oil redicue in the intake mainfold. I had an IH/Ford 6. 9L with a Banks turbo kit on it and the crankcase ventilation system was re-located pre-turbo and kept the turbo compressor blades well oiled.



Bill

 

[DocStressor]

Clogged up intake manifolds on TDIs are a fuel quality issue. People using high cetane, low sulfur diesel (Amoco Premium, biodiesel or any California diesel) don't have this problem. All diesel sold after 2007 will be fine for the EGR equipt Cummins. But until then ?????

 

[KCJackson]

Originally posted by Lee Weber

All diesel sold after 2007 will be fine for the EGR equipt Cummins. But until then ?????

Exactly the reason I will get a 2004. 5 HO <B>with</B> EGR. The Ram I have will be 8 years old by then, and I expect to keep the next one hopefully as long. So if I have to deal with low/no-sulfur diesel and other mandated changes like it, I'd rather have the engine that will be intended for that use, rather than worry about whether my 2003/04 non-EGR will run properly on the new fuels.



Just my pair of pennies.

 

[DarrellB]

Can't remember who told me or were I heard it, but there is a good possiblity that they won't have to use the EGR on the Cummins in the Dodge. It being a light diesel truck it will most likely be able to slip through the loop holes in the clean air laws. If the new Echo 5. 9 is used in medium or heavy duty trucks it will have to have the EGR by 2004. I can't remember if I got this off Cummins' website or if it was in my local paper? I'm going to check when I get back from Muncie because I'm pretty sure it was in the paper this week.



I sure hope it's true.

Darrell

 

[Sled Puller]

Keep in mind that the Cummins sold in California HAD the EGR valve already, mine did.

Stupid deal all the way around, and does nothing to help the air we breath.

 

[DocStressor]

I think you guys are confusing the positive crankcase vent system used on some of the California 12 valve engines (and diesel cars) with the cooled EGR system used on the VW TDI and proposed for the Cummins. The older system simply feeds blowby from the crankcase back into the intake manifold to be re-burned. This reduces emissions by maybe 10%. The cooled EGR system is much more sophisticated and carefully meters a small amount of exhaust back into the intake manifold after passing it through a cooler in order to reduce the combustion temperature in the cylinders. This is an effective way to reduce NOx emissions, which form at high temperatures without seriously affecting performance. This lets the engineers move injection timing back to a more "natural" state. This system has been used in Europe with good success for years. The only real downside is that lower combustion temperatures and re-circulated exhaust tend to increase soot in the oil. Thus, the CI-4 oil specs designed for EGR diesel engines have enhanced soot holding capacity relative to the older CH-4 standards. Soot is unburned hydrocarbons, mostly derived from aromatic components in the fuel. Since removing sulfur also converts aromatic compounds, low sulfur diesel produces less soot than the current ~500 ppm sulfur, 40-45 cetane fuel sold in most of North America. European diesel generally contains only 50-100 ppm sulfur and is rated at >50 cetane. Since aromatic compounds contain less energy than paraffins, removing aromatics also increases the cetane rating of the fuel. This is an added bonus of ULSD that can be utilized by engineers to increase the power and efficiency of the engine. ULSD with a cetane rating of over 60 is available from ARCO in California right now. The older engines run fine on this stuff. The newer engines should run even better once this type of fuel is generally available.

 

[mberry]

ULSD at ARCO

Originally posted by Lee Weber

... ULSD with a cetane rating of over 60 is available from ARCO in California right now. The older engines run fine on this stuff. The newer engines should run even better once this type of fuel is generally available.

I ran a few gallons of this in my trucka couple weeks ago. Truck ran good. Seemed to be no ill-effects. imho.

 

[Riflesmith]

Lee,

Pariffins produce more BTU's per pound than aromatics. Aromatics are more dense than pariffins. This results in aromatics producing more BTU's per gallon than pariffins. BTU's/gallon is what determines fuel economy. It is true that aromatic compounds present in today's diesel fuel are bad news when it comes to soot formation. These compounds also lower the cetane rating of the fuel.



Aromatics do have some positve effects. One of these is they lower the gel point and cold filter plug point of the fuel. Another is they are more dense than pariffins which increases the BTU/gal content of the fuel. This gives us better fuel economy.



Most opinions I have seen seem to think the new ultra low sulfur diesel fuel that will be mandated in the coming years will be the greatest thing since sliced bread. I think it will create as many problems as it will solve. It will result in a smoother running engine due to higher cetane. It will put less soot into engine oil. It will also give us fewer miles per gallon. It will gel at a higher temperature unless winterized heavier than today's fuel. Last but not least it will cost more.

 

[LAnthony]

Exhaust brake

As far as the question about the exhaust break is concerned, there won't be one available for the ISBe engine. Not because of EGR, but because they have to go to a variable geometry turbo, The word is that the exhaust break will kill the turbo. I am sure the good people at Jakobs are working on something, but the official word around here is, no exhaust break available for the ISBe..... YET... ... -Lane-