Does my M7040 have a EGR engine? Pictures to help!

[bilrus61]

Got my M7040 from Barlows in the fall of 2012. I thought it had none of the eviromental stuff on the engine. I've since found out that some of the late M7040 models might have had a EGR engine installed in them. Anyone out there can tell me if this engine in the pictures has a EGR valve or is that round thing the turbocharger?

 

[Gary Fowler]

I don't see a turbo in any of the photos. It would be mounted to the exhaust on the hot side and air intake past the filter on the cold side. Not sure what round thing you are referring to. Likely as not, you don't have any EGR emissions equipment on a 2012 engine.

 

[mkreitler]

Hi Gary, The one picture with the fuel filter showing in it rite in front of it notice a guard that says hot on it if you look to the rear of it there is a tube shaped object that is connected to a external EGR VALVE.You have the same engine as I do in my M7040 witch has the EXTERNAL EGR VALVE. The turbo is on the exhaust side of the engine off the EXHAUST MANIFOLD because a TURBO is driven by EXHAUST GASES. So yes you have a EGR EMISSIONS ENGINE witch is not all that bad the newer TIER IV engines have EGR PLUS A PARTICLE FILTER. Are as DIESEL PEOPLE CALL it a DPF.Not to worry just use a MOTOR OIL RATED API CJ-4.

 

[Tx Jim]

If your tractor a M7040HDNBC? if so it has a EGR valve. Round white filter looking thingy is a check valve.

 

[Imaybail]

The downside of EGR is the additional soot load that is added to your oil. That's why CJ 4 oils are specified. They contain additives that are supposed to be better at holding the soot in suspension between oil changes. Other properties of CJ oil are related to removal of anti-wear agents such as sulfur and zinc in an effort to reduce emissions. If you can find API CI rated oil, it will offer a better additive package with no negative effects on the EGR system.
Also, if the EGR system is cooled by the cooling system of the engine, the possibility of a cracked heat exchanger can lead to cooling fluid being introduced into the cylinders, with obvious negative results.

If your EGR system were to become inoperable through a defect or loose wire or blocked hoses, your engine would probably be better off in the long run.

 

[MHarryE]

I believe your tractor has an EGR valve as it is an interim Tier 4 engine. Tier 4 final engines have the DPF in addition to cooled EGR. If you disable the EGR the combustion chamber temperature will be higher at full power. The WSM does not list any problems associated with this although higher temperatures in the combustion chamber and exhaust could mean heat related issues unless the engine is designed to run without the cooled EGR. You have to ask yourself if disabling the system in hope that you get more power at the expense of potentially damaging your engine is worth it. It may not carry any risk - I do not, however, remember anyone on here talking about blocking their system but many said they will do it if they ever buy a tractor so equipped.

 

[MHarryE]

I did a quick search on defeating the cooled EGR and as I suspected reported failures are blown head gaskets and burned valves. That follows since the combustion temperature under load will be much higher than that for which the engine is designed.

 

[Recoveryhill]

I did a quick search on defeating the cooled EGR and as I suspected reported failures are blown head gaskets and burned valves. That follows since the combustion temperature under load will be much higher than that for which the engine is designed.

Add to that damage to your neighbor's lungs. China is in meltdown these days due to absence of pollution controls. Look at Los Angeles in the 1960's for a homegrown example. I wouldn't dump my garbage on your land and appreciate being able not to dump combustion pollutants on your family.

 

[bilrus61]

I was basically wanting to concerning oil changes and synthetic extended oil changes. Since it is a EGR I'll leave it alone and use dino oil and change per manual. I wasn't really thinking about disableing it IF it had it and it does. Thanks for all that responded to my question.

 

[wmonroe]

MHarryE - did you find threads here on TBN with damage related to removing the egr? Just curious as I would like to read them.

 

[MHarryE]

MHarryE - did you find threads here on TBN with damage related to removing the egr? Just curious as I would like to read them.

No, I found truck engine forums plus references in engine troubleshooting guides referencing the result and probable cause. I was somewhat surprised on engines showing this cause and effect in that I thought they would have software that would have put the engine into a "limp home" mode if something like this was detected. Also before retiring I was part of an engine development team and this was a failure mode of which we were aware and by knowing the problems resulting from various exhaust gas sensor outputs we de rated the engine in stages. By this I mean if a normal 175 HP engine reached exhaust temperatures outside safe parameters we limited fuel to 160 HP. If it still ran outside doe then we refueled it to a 145 HP engine and kept stepping down.

 

[kuboman]

I know dozens of truckers that have deleted the emissions on their engines with 0 problems, in fact the engines ran better and likely lasted longer than with emissions garbage on. The internet is full of misinformation.:2cents:

 

[wmonroe]

No, I found truck engine forums plus references in engine troubleshooting guides referencing the result and probable cause. I was somewhat surprised on engines showing this cause and effect in that I thought they would have software that would have put the engine into a "limp home" mode if something like this was detected. Also before retiring I was part of an engine development team and this was a failure mode of which we were aware and by knowing the problems resulting from various exhaust gas sensor outputs we de rated the engine in stages. By this I mean if a normal 175 HP engine reached exhaust temperatures outside safe parameters we limited fuel to 160 HP. If it still ran outside doe then we refueled it to a 145 HP engine and kept stepping down.

Thanks for the info.

 

[MHarryE]

Not saying it can't be done because I don't know every engine and application. What I can say is that in development I have seen the failures I described on engines and know the software solution to prevent it from happening.

 

[The Fred]

When an EGR is deleted combustion temps rise. The reason EGR was invented was to cool combustion temps and the formation of oxides of nitrogen, the fifth bad gas according to EPA.

Nitrogen Dioxide | Air & Radiation | US EPA

Fred

 

[jkornbread]

Im rather curious where everyone is coming up with combustion temps being higher with egr defeated. Diesels operate a little different than gasoline engines. It would make more sense that combustion temperature would drop. When a diesel is lacking oxygen, then exhaust temps rise. This is why in trucks its so common to upgrade to a bigger turbo to keep the temps in check. So by defeating the EGR and not introducing the oxygen deficient air into the intake of the head, it would seem that you would have more oxygen available for combustion, resulting in more power, better fuel economy, and a LOWER combustion temperature. Not that any of these would be huge differences on such a small motor.
Another thing is egr loves to gunk up and choke the intake tract over time............

 

[kuboman]

Im rather curious where everyone is coming up with combustion temps being higher with egr defeated. Diesels operate a little different than gasoline engines. It would make more sense that combustion temperature would drop. When a diesel is lacking oxygen, then exhaust temps rise. This is why in trucks its so common to upgrade to a bigger turbo to keep the temps in check. So by defeating the EGR and not introducing the oxygen deficient air into the intake of the head, it would seem that you would have more oxygen available for combustion, resulting in more power, better fuel economy, and a LOWER combustion temperature. Not that any of these would be huge differences on such a small motor.
Another thing is egr loves to gunk up and choke the intake tract over time............

As you introduce more oxygen the fuel burns hotter not cooler. As stated before reducing the oxygen with the egr lowers the exhaust temps but increases the soot hence the need for a dpf. A vicious circle all payed for by the consumer to satisfy an out of control government agency that has no accountability. Sorry for the rant.

 

[Dave M7040]

As another Canadian with a an 2012 M7040DTHSCC1 I too am of same position as kuboman i.e. when EGR is present cylinder temps are reduced to reduce the formation of oxides of Nitrogen.
Dave M7040

 

[m5040]

The external EGR system was added to an already existing engine family to comply with emission standards. How can there be a risk of engine damage if the pre-EGR engines didn't have them? The injection pump does not have a boost sensor, so it doesn't add move fuel as the boost rises (like on-road truck engines). That indicates the turbo just adds more air to burn for less smoke and the turbo boost causes the EGR to open and add exhaust to the mix to reduce NOX. Half the time the EGR is closed anyways.