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Removing EGR (Exhaust Gas Recirculation) System

Removing EGR (Exhaust Gas Recirculation) System

Rdavison39

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Location
Oakville Ontario
Vehicle(s)
1977 CJ7. 304 H. 52,000 original miles.
2010 Wrangler 2Dr
I've removed my air injection system basically because all the pipes were rusted. I'm just wondering about the EGR. I believe this, like the air injection system, is really centered around emission controls. Is this piece required (apart from passing emission tests which I don't have to do in my province with the age of vehicle) or can I just remove it?


Thx
Ron

IMG_1879-2.webp
 
It will idle a bit smoother with the EGR but and the carbon monoxide a benefit to combustion. Please don't ask me to document this it has been a lot of years since I have researched this. Here in Tx, technically it has to be there even if it is not tested
 
buy a replacement EGR valve gasket and fab a flat plate to fit the gasket and toss it. I have never run an EGR valve because it recirculates hot exhaust back into the intake. I have always been a hot rodder so an EGR valve goes against everything hot rodders are trying to do

This is the first time I have ever heard anyone defend keeping an EGR valve. As old as yours is its probably clogged full of old burnt oil and gas fumes by now. If you keep it it would not hurt to clean it out and test its functioning :chug:
 
If you remove it and it looks like that below, toss it and buy a new one, if you want to keep it...

26975021gz.webp
 
EGR valves are a good thing that doesn't hurt engine performance. Yes, it does go against logic, but there is enough documentation on the subject for me to believe it's true. A slow turning engine like in a CJ needs all the cooling it can get.
 
An EGR valve does not cool anything. It allows un-burnt exhaust gas to go back into the intake and then into the cylinder to be re-burned and reduce NOX emissions. It simply helps the tailpipe have a cleaner exhaust.
 
and it won't hurt anything by removing it. At most maybe the carb will run slightly leaner....maybe.
 
Then a number of technical articles on EGR valves are not correct.
 
Every Jeep engine from 1942 to 1972 has been running fine without them.
 
Then a number of technical articles on EGR valves are not correct.
I didn't mean to come off as rude. I just never heard of recirculating hot gasses to cool a motor. If you can link a couple tech articles then I would like to learn about it.
 
I totally agree, it simply doesn't make sense. Back when the very same question came up for my CJ I did some research on removing it. Most articles, well all the articles said that the ERG valve makes the engine run cooler, and helped with mileage issues, why? I honestly don't know. Which articles they were, heck I don't honestly remember, but it was an easy search with lots of information. I'm sure there are better computer guys out there that can do better, more complete searches than I can come up with.

Posi - True, I can't argue that point. But along the same logic a 2016 engine isn't the same as a 1986 engine and a 1973 engine has little in common with a 1952 engine. For almost 100 years engines ran with open crank case breathers, so your logic would say that a PCV valve is unnecessary. I suppose that is an environmental issue to be argued by others better suited than I am.
 
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Where not talking 2016 engines or PCV. We're talking old engines here, 86 and down. A good comparison would be a 1970 360 no egr to a 1976 egr 360. You won't hurt the engine removing the egr just like you won't gain any HP by doing so. The carb may run a tad richer with a egr valve and you may have to slightly adjust the carb if you remove it. Saving fuel with an egr valve, our CJ's are bricks rolling down the road with large tires under them. Nothing to see here.
 
Lol boy the random things that get us fired up......


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I suppose it is silly to go on about things like this. I'm not big into the mid '70's emissions controls and there are few that I agree with. With that being said there are times where removing something that is essentially innocuous while possibly improving emissions seems, I don't know the right way to say this, but foolish. When I bought my CJ it had no emissions on it except for the cats in the exhaust. Living here in the Tucson valley I was required to put them back on or face several unacceptable driving restrictions, like not being able to park in the downtown garage. If you drive on an exempt plate they put a sticker on it that essentially does not allow driving in metro Tucson. Park there and you are driving your exempt vehicle to work which is unacceptable. If and it has happened the driving authorities (I don't know who) will go in the garage, document the plates and fine the parking facility for allowing the vehicle in the garage. Unfortunately Arizona requires an under the hood inspection of any vehicle '75 and newer, if I had a '74 there would be no problem with no emissions. So, I had to spend considerable money to make my CJ emissions legal in Arizona. I hate to see others have a similar experience.
 
Wow I didn't realize east LA reached all the way over to Arizona
 

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