I'm upgrading my knowledge about my LML thanks to these forums. I'm somewhat new to diesels and naturally I have questions. Bear with me ok.
I want to eventually get ALL emissions nightmares gone from my 2012. Is a block off plate one thing and the full EGR delete another? Does the plate do the job and its up to you to take out the junk while you're in there or what?
So I just started looking at this for my 2500HD, and i guess im getting mixed responses, im seeing some say DONT DELETE EGR, just upgrade the cooler.
"The reason for the EGR failures is due to poor Cooling""?
I guess if your looking to stay compliant is it better to just upgrade the cooler? what else do you gain from the delete? also if the delete violates federal law, does anyone know what law and where to find it?
Delete the EGR, do you really want soot going back into your engine? Look up pics of clogged EGR's, that'll make your decision easy. First thing I did on my truck a week after I bought it.
Full delete was pretty difficult the first time, if I were to do it again it would go much easier since I figured out a few tricks. If you're not real mechanically inclined just do the blocker plates.
Wow, those are some nasty looking Pictures...I want to delete, but im worried about inspections/Warranty loss....(I think those are really the only two factors holding me up)
so if I got this right the blocker is in lue of a tune?? or do you still need to tune for blocker plate install? and if tune is needed, does that void any warranties?
Blocker is the most popular method and totally legit.
is the blocker really legit? first vendor I found selling blocker plates make you sign an agreement stating that the blocker plate is only legal for Competition use, and violates federal law for street use :/
Blocker is the most popular method and totally legit. Less expensive and easier install. A full delete consists of removing the entire EGR assembly and replacing the intake tract with a mandrel bent pipe in addition to a new or capped off passenger side up pipe.
No real reason to do a full delete unless you want to, gonna change things in the engine bay later anyway, or you want to prevent future issues with coolant intrusion.
It will also be "disabled" when you get tuned. With it disabled, it will no longer function but there will not be a physical obstruction in the exhaust path, which is what the blocker method is, which could potentially allow for the egr valve to open under high boost. The valve opening is very unlikely.
I went straight from disable to delete and skipped the blocker. I would suggest starting with delete tunes and going from there. No need to do anything with EGR immediately since it will be disabled, allowing you the time to choose what you want. Without the EGR in the engine bay, there is a lot more room to work and much less to remove when digging in.
^^^ legit as in works well without major issue. it still leaves an intake tract coated with soot, but no more will pass into the intake as the blocker has blocked the passage.
If you are deleteing, dont wasteyour time thinking about a blocker plate before/after. It is usually done in conjunction with the tunes/delete and as a part of it. It is not needed, as when deleted/tuned there will be no EGR functional to require blocking. bloocking at this point is extra security in case the EGR valve is forced open under heavy boost.
IIRC, the newer trucks need tuning, or should have tuning with a blocker. The LLY's could use a "fingerstick". That being said, I didnt spend to much time on the blocker and left mine completely out. I drove disabled for 15k miles, and have had the EGR removed for the last 10k
Can you pass emissions testing with the blocker plate installed? Or would you have to take it out before getting testing done? I would imagine removing and then re-installing the blocker plate every year for emissions certification would lead to exhaust leaks.
wade_660,
Thanks for the response. I've read that the blocker plate will throw codes on newer models. I have an '06 LLY. From what I've read, I don't have to worry about codes. I'm really worried about what the gas analyzer will read when I have to get my emissions tested. If the EGR gases are blocked from returning to the intake, I'm guessing they are going to exit through the exhaust. I was just hoping someone else has experience with this.
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