Noisy Adblue Tank
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Super Member
Joined: Jul 2009
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15 GL550
Noisy Adblue Tank
I've got about 3700 miles on my GL320 Bluetec and I started noticing what sounded like something coming loose or banging around in the rear of my GL. To diagnose, I opened up the spare tire compartment (that doesn't have a spare) and rocked the car back and forth by pushing on the bumper. Sure enough, the sound was from the adblue sloshing around in the tank. Since the adblue tank sits inside of the passenger compartment, there is no sound insulation. This is something I can live with, but I might as well have an Igloo cooler half full of water in the back of the truck. I figure I didn't notice this before because the tank was full and couldn't splash around quite as much.
Anyone else noticing this yet?
Anyone else noticing this yet?
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Thread Starter
Super Member
Joined: Jul 2009
Posts: 814
Likes: 9
15 GL550
funny.
On a serious note, I did some research on Bluetec technology and this is what I found: Every new diesel truck engine (Cummins, Mack, Detroit Diesel, Paccar aka Kenworth, Volvo) sold after Jan 1, 2010 will be using SCR technology (same as Bluetec) due to EPA requirements. International (Navistar) is the only exception and will use EGR. EGR basically recirculates the exhaust back through the engine and makes the engine run really hot requiring additional cooling capacity. It works but isn't quite as good at getting the NOx out of the exhaust on larger displacement engines. International is using credits from low emission pre 2010 trucks that used EGR to "buy" their way into EPA compliance for the near term. SCR makes the engine run about 3% more efficient that EGR. You eventually will be able to buy DEF (generic name for Adblue) everywhere. The engine manufacturers are setting up the distribution network right now. Prices should go down and your dealership will only have a few more months to sell Adblue for $225+ a fillup. I think my dealership is getting around $275.
So, I guess urea is here to stay.
On a serious note, I did some research on Bluetec technology and this is what I found: Every new diesel truck engine (Cummins, Mack, Detroit Diesel, Paccar aka Kenworth, Volvo) sold after Jan 1, 2010 will be using SCR technology (same as Bluetec) due to EPA requirements. International (Navistar) is the only exception and will use EGR. EGR basically recirculates the exhaust back through the engine and makes the engine run really hot requiring additional cooling capacity. It works but isn't quite as good at getting the NOx out of the exhaust on larger displacement engines. International is using credits from low emission pre 2010 trucks that used EGR to "buy" their way into EPA compliance for the near term. SCR makes the engine run about 3% more efficient that EGR. You eventually will be able to buy DEF (generic name for Adblue) everywhere. The engine manufacturers are setting up the distribution network right now. Prices should go down and your dealership will only have a few more months to sell Adblue for $225+ a fillup. I think my dealership is getting around $275.
So, I guess urea is here to stay.
Thread Starter
Super Member
Joined: Jul 2009
Posts: 814
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15 GL550
btw, I just noticed that Pilot Travel Centers has installed their first DEF pumps. One is in Brooks, Oregon, the other in Charlotte, NC. Price = $2.79 / gallon. So, that is $23.15 per 10,000 miles to fill up the 8.3 gal Adblue tank.
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2011 E350 Cabriolet..White and Almond Mocha
