RVr's get EPA Reprieve

Those Massive Diesel Engine RVs with the same EPA packages as on every Large Commercial truck are getting a reprieve and release from EPA Regs thru Congress.  Been told by a engine shop mechanic that RVs can now have APPROVED software loaded in ECMs to reduce the effects of emissions equipment faults shutting the machines down or derating them enough to not be drivable.  Expense and inability to acquire repair parts in a limited time frame brought this on.

Edited by DMiller - 22 Sep 2021 at 5:14am

Edited by jaybmiller - 22 Sep 2021 at 6:34am

Lars(wi) wrote: But, do ‘non-compliant’ engines actually ‘pollute more’? Nearly everyone complains about reduced mpg’s with the newer engines, reduced engine life, etc. How can the need for early overhauls, replacing emission parts, etc., which require parts to be manufactured ie: smelting, steel mfg., etc. Overall it’s just moved the pollution to a different source.

I can attest to that statement! Lol and have said the same thing many times!

WF, I know what you are driving at. But my point is, the whole DEF/Regen, perticulate filter, etc.,etc. is a scam. The days of an OTR truck going a million miles before an overhaul are long over. Yes, these engines may have less carbon coming out the stack, but the pollution coming out the smokestacks of the foundry’s that have to manufacture the replacement engines, cancels out what gains there may have been.

That adds insult to injury. The EPA has claimed that they have the authority to stop racers from taking an ordinary car off the road and be modified for racing use only. Basically what they’re saying is it doesn’t matter if you’re never going to drive it on a public highway ever again, all emissions controls must be left in place and functional.

BUTT, BUTT, BUTT..... your SAVING THE ENVIRONMENT !!!  Dont you just LOVE IT !      

I have seen a new set of doc and dpf run 150-250k if everything else on the engine operating correctly. The baked sets we put on are doing good to last 120k and if they've been cleaned more than a couple times they're lucky to last 80k. All of our trucks are higher milage, we buy at 450-550 and "try" to run to a million or 1.2. I have done countless overhauls at 600-800k mostly due to high crankcase psi and/or low oil psi, seen several pitch rods or spin bearings, these engines should run a million without much trouble but all the emissions crap has lowered the life. It's not uncommon to get 30 grand in a complete overhaul and that doesn't touch the emissions components yet, that can easily add another 10 depending on what all it needs. Brian is correct, Def has no effect on dpf, the Def is injected after the dpf into a decomp tube the goes to scr catalyst, it's only purpose is to lower nox gasses.
I understand what they're trying to do here but the problem is, as irritating as it is to have something shut down or derate, it does that for a reason. If the RV owner chooses to ignore the light and just keep driving the doc and dpf can plug enough that the engine won't run then instead of a repair for a sensor or maybe a bake on the dpf he's now going to have a tow bill and buying a bunch of expensive new parts!
I think all that stuff on an RV is going to be a nightmare for everyone involved if not already. Def does not have a long shelf life in the first place and is even shorter if exposed to extreme temp changes, like parking your RV outside or in cold storage. Just seems like alot of issues could arise.

BPM75 wrote: Kinda off topic but a couple weeks ago I had a truck in the shop a driver had pumped DEF into the fuel tank then drove it till she quit! Not sure how much he put in but enough I ended up replacing everything on the fuel sys! Cleaned tanks and flushed lines from tanks to primary filter but everything on the engine got replaced. What a mess. We've had several put diesel in def tank but this was a first! I almost wonder if it isn't intentionally done.

Oh boy! I had a Duramax ambulance that the captain did that to when urea first came out. Must have been about 2011 or 2012. I saw the final bill on that one, right about $15,000. The chief was not happy about that...

great, now you've got me wondering how much oil  is used and what pollution one 'super tanker' produces hauling our natural resources (raw materials) to China and bringing cheap goods back to North America,for one trip. Aside from loading/unloading they're always churn,churn,churn, burn, burn burn.....cough.cough cough....

Yep, urea is not any sort of heat boost. It facilitates a chemical reaction in the scr to reduce NOX emissions only. Has nothing to do with particulate function or regeneration.

The idea they had was to move the scr in front of the catalytic converter so it could continue to function during a particulate filter regen. Before they did that, the scr was between the catalytic converter and DPF and couldn’t function in the extreme heat of a regen. The problem is the crystallized def can build up which used to be incinerated with the soot.

Edited by Brian Jasper co. Ia - 23 Sep 2021 at 8:53am

So, if you purchase a new semi as a "glider kit" and then have a rebuilt older engine put in, does that eliminate the need for this DEF crap?

Try buying one, NON Existent from the manufacturers currently.

jaybmiller wrote: meanwhile China pollutes 1000x worse, per day than ALL of NA in a year yet WE have to have emission restrictions.......sigh it has NOTHING to do with 'clean air', it's a 'power trip' plain and simple.