Prevent EGR troubles?

I don't know that they'd appreciate that crud? Or maybe they don't care?

I was on the case real early with ours, even with just Oxi it went very well. Brake cleaner was not that effective on the cooler.

 

I would think a few hours soaking followed by a quick rinse blast would neutralize most of the bad stuff in the crud.

I wonder how effective Dawn dish soap would be against it, after all, it cleans the oil off wildlife.

 

If I'm not mistaken, car wash run-off goes is either reused or goes into regular sewer system (not storm drains, direct to nearby streams), which is good.

I liked Oxi alone, because it was easy/convenient (albeit took a little while), 100% effective (albeit only 70K kms in my case), all the waste water goes into regular sewer, and it's not "dramatic".

 

Oxi worked great for me as well! Pro tip - invest a buck or two in a rubber stopper to plug one end of the EGR cooler...it works great!

Example in this post..see pic under "Trying to clean the removed EGR cooler " :
Hi all, new Prius v owner | Page 3 | PriusChat

 

Glad it worked out

Pixel XL ?

 

I bought a used one including the EGR valve off of eBay to use as a spare. I used the rubber stoppers and soaked mine for about 6 weeks, checking and replacing the solvent every week. Every time, except the last time, the water came out tinted. The last time, the solution came out totally clear. That's when I knew the cooler was as clean as a brand new one. Maybe "compulsive and obsessive," but I had plenty of time.

The EGR valve easily cleaned with an old can of Berryman's automatic choke cleaner. That took less tan 15 minutes.

 

Nice. So is your plan to rotate those two EGR coolers at 50k mile intervals or whatever? So you always have a clean one ready to pop in?

Really clever. I know sometimes being able to continue the job without an interruption, as cleaning would require, would probably make things a lot easier / better.

 

Thanks, as an engineer, I like good planning. $200 less for an equivalent NEW EGR cooler is worth the time and wait.

Near the end of the car's life or if I decide to sell the car, the perfectly clean as new set will sell for at least what I paid for it.

 

With a lot of scrubbing...

 

According to the EPA. In 2000 the EPA released the Tier 2 gasoline program to lower the limits of sulfur in gasoline to 160 ppm. In 2017 the EPA released the Tier 3 gasoline program that limits the gasoline down to 10 ppm. Reducing sulfur was found experimentally to reduce particulate matter. I think this is significant to our EGR components since soot (PM) is plugging up these components.

I'm skimming through the final report released by the EPA titled "Fuel Effects on Exhaust Emissions from On-road Vehicles in MOVES2014: Final Report". In it contains information on and graphs of how much fuel sulfur influences particulate matter. Particulate matter is the soot that plugs up our EGR coolers.

Burned sulfur is a combination of sulfur in the burned lubricating oil + sulfur in the burned fuel (page 107):


Figure 9-2 (page 111) of the report demonstrates a linear relationship between fuel sulfur and PM output.



Maybe all fuel that meets the Tier 3 gasoline blend will greatly lessen the EGR depositing in our cars?

 

Is there any reality in this? (no I did not read the report)
In that pretty drawing I see a rectangle and a right triangle with nice contrasting colors.
The caption says "this figure demonstrates ..."

I know we are saturated with fake news and junk science, and consequently respect for truth and the laws of physics is diminishing rapidly, but Wth? [EDIT - BTW, the autocorrect filter changed W ... T .... F to Wth ] Nobody cares? This is a government report that people are expected to take seriously???

Not suggesting anything is wrong, but I bet I could make a figure that demonstrates {anything I want} and it might be equally meaningful.

And the plot with straight lines looks similarly conconcted. As if they are trying to tell a story rather than present information.

 

Questions a report without reading it?

 

No that was actually part of a paragraph. The picture I inserted into my post is only a snapshot meant to help people read. The real paper is 100+ pages. I did say I skimmed it

We're also saturated with armchair charlatans that can't take more than 2 seconds to read a credible source before trolling.

 

How do you tell an armchair charlatan from an actively practicing one?

 

The actively practicing one has nicer shoes.

 

Not expecting you to read the whole thing of course. Not commenting on your relaying it, or its relevance to the EGR.

But that was an actual figure from an actual technical report, right?

So I maintain that is not good. Shameful, even, unless for a middle school science fair. It appears to be (and tell me if I'm wrong - I'd be happy to learn I am) a non-scientfic presentation of something that probably could be presented with actual data if anyone cared to do the work, and if there was a sufficient audience expecting higher standards.

 

Even just looking at as much as mjoo posted, I can see there's both a "Figure 9-1" and a "Figure 9-2", and 9-1 does not claim to be anything other than a schematic. Literally the first word of its figure caption is "schematic".

It's certainly fair for someone about to present an analysis to start with a simple schematic of how the analysis will be organized, and the components and relationships that will be analyzed.

As for figure 9-2, it is clearly captioned as showing a calculation involving equation 9-1 and the parameters in table 9-1. mjoo didn't post those, but I bet they're in the report. If the equation is linear, it wouldn't be too astonishing for the plots to come out lines.

There wouldn't be anything wrong with somebody engaging with the report and making an argument that, oh, say, equation 9-1 is incorrectly derived, or the parameters in table 9-1 aren't right. But that doesn't seem to be what's happening in the comments above, which sound a bit more like trying to pose as too smart to actually read or engage with a presentation.

 

Well some people have lower standards I guess. Up to you. I don't think derailing the EGR discussion helps anything. If the authors put as much effort into their documentation as you have put into their defense ...

 

You're seriously going to continue to pose as having higher standards, demonstrated by your facile characterization of 107 pages of "documentation" you're not going to look at?

 

We got netflix to catch up on, reading is optional here.