EGR delete on new turbo Kubota?

[ccsial]

But aren't you worried about all the baby seals? Seriously, I would ditch it too if I had it.

You have baby seals in Arkansas..

 

[greenrider1]

I just got off the phone with a couple of the shops that build the EGR delete kits for the diesel pickups. Unfortunately, neither had any plans on doing kits for tractors, yet. Although one did tell me that they have had a growing number of requests from tractor owners. Obviously it's a lot smaller market. They did both agree, however, that simply deleting the kit would not lead to engine damage, but rather benefit the engine by not feeding it soot. One of the techs did tell me that the ECM most likely will not know the difference whether the EGR is functioning or not. The one shop told me if I brought my tractor in, they would build the kit (unfortunately they're in MI, and I'm in NY).

Anyone on here have a machine shop that would be interested in making the block-off plates? I could make cardboard templates of the flanges on my intake manifold and exhaust manifold and send them out. Probably stainless steel would be the best material. Might be able to get enough interest to do a group buy?

 

[greenrider1]

But aren't you worried about all the baby seals? Seriously, I would ditch it too if I had it.

I won't even have to post on here when I finally get'r deleted, there will be no hiding it. All of the polar ice caps will melt instantly, leading to mass flooding of the coastal areas. Acid rain will disintegrate everything. And I'll be having baby seal kabobs for dinner.:licking:


Just kidding!:laughing:

 

[MyJoBota]

Okay so the new 5240 and 5740 have the v2403-m-te3 engine. If I understand this correctly this is the Teir 3 engine with egr. The v2403-m-te2 is the older Teir 2 engine with out egr found on older models. The pump timing spec. on the Teir 3 with egr is 8.50* to 10.00* before T.D.C.. for the Hst model. The Teir 2 engine with out egr timing spec. is 16.0* to 17.50* before T.D.C.. I'm thinking the difference in the timing spec. is due to the egr. If I were considering to do the delete I would also set the pump up to the Teir 2 specs. which would be done by removing shims. I would be willing to bet it would improve starting especially cold and overall performance.

 

[kuboman]

I did a little more looking around under the hood, and the EGR system is incredibly simple. The cooler is on the left side, right under the exhaust manifold, and attaches with two bolts. Coolant line in and out of the cooler. The exhaust exits the rear of the cooler through a steel line and goes behind the engine and over to the right side, where it goes into a vacuum operated EGR valve, and then on into the intake manifold. This system would be easy to physically delete the entire thing by just putting a block off plate on the exhaust manifold and one on the intake manifold, and connecting the coolant lines together. I'm going to do a little more research into the fuel injection timing before I do anything, but I don't see any way that any engine damage would occur from doing this. If it was that sensitive, a kinked or cracked vacuum line going to the EGR valve could lead to catastrophic engine damage!:shocked: As Kuboman has already stated, just blocking off the vacuum line going to the EGR valve would prevent the valve from opening, but a complete block of the system would prevent all the nasty diesel exhaust from going back into the intake.

Just a technicality here but the line is a pressure line that takes boost pressure to activate the egr valve, not a vacuum line.:thumbsup:

 

[indianaEPH]

Hmmm......EGR is installed specifically to reduce peak cylinder temperatures which result in the formation on oxides of nitrogen( NOx, a regulated pollutant). It is a very effective way to do this. Removing the EGR will allow the engine to run cleaner, meaning the soot/smoke with go down. This will result in cleaner oil and perhaps better oil change intervals.

However, I don't know how this engine is set up. Many times EGR is not used at all times (hence the control valve). So depending how you use the tractor, you may not see much of a difference.

Contrary to wikipedia, using EGR is an efficient way to reduce NOx. Comparing apples to apples, EGR is often a more efficient way to meet NOx regulations. Another can be to reduce com pressure or turbo compressor flow (neither is good for efficiency).

You will get higher peak cylinder temperatures. You will have to do your own performance monitoring to determine if that is acceptable or not.
I assume you are no longer in warranty?

 

[greenrider1]

Okay so the new 5240 and 5740 have the v2403-m-te3 engine. If I understand this correctly this is the Teir 3 engine with egr. The v2403-m-te2 is the older Teir 2 engine with out egr found on older models. The pump timing spec. on the Teir 3 with egr is 8.50* to 10.00* before T.D.C.. for the Hst model. The Teir 2 engine with out egr timing spec. is 16.0* to 17.50* before T.D.C.. I'm thinking the difference in the timing spec. is due to the egr. If I were considering to do the delete I would also set the pump up to the Teir 2 specs. which would be done by removing shims. I would be willing to bet it would improve starting especially cold and overall performance.

I read your cold starting thread. Lots of good info there. Did you ever adjust your injection pump? Mine starts like yours and fills my barn with white smoke if I don't plug in the block heater. My older L3710 hardly smoked at all.

 

[greenrider1]

Just a technicality here but the line is a pressure line that takes boost pressure to activate the egr valve, not a vacuum line.:thumbsup:

You got me! Now that I traced where the line goes more carefully, I see that it is indeed a pressure line. Thanks.

 

[cougar21300]

Cold start problems?? My 5240 will start easily and immediately even after being out in single digit temps for a few days. It does have 550 or so hard working hours on it so I'm sure that helps. I also run Rotella T6 synthetic and Super UDT, maybe that's the trick?
I certaqinly wouldn't want to mess with the turbo or pollution circuits, it just runs to good right out of the box! This thing starts far better than my last 5030, has GOBS more midrange torque, and uses far less fuel to boost

 

[MHarryE]

I have a L5740 and will be interested in hearing how this comes out. Since the EGR keeps combustion temps down and you will no longer have it, will the higher temps have a negative effect on piston tops, turbo turbine, etc.? Of course the tractor companies interested in improved fuel economy reduce NOX with SCR so I assume they build the engines to handle higher internal temps and Kubota uses pistons and turbos built by the same suppliers. By the way the law says that in my power class Kubota must warrant the emissions related items for 3,000 hours and that is a lot longer than I intend to have my tractor.