Need Some Guidance Please
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Logistics Pro
Joined: May 2004
Posts: 3,607
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Need Some Guidance Please
I have researched for a while today in regards to deleting my EGR valve on my '04 PSD.
Will unplugging the EGR valve prevent exhaust from circuilating to the EGR cooler ? (sorry for the stupid questions, not to savvy on my motor yet)
I am planning to do the EGR cooler delete soon
Once I perform the EGR cooler delete system, is it necessary to only unplug the EGR (before startup)and leave it in place to plug the hole or is it a better idea to completely remove it and plug the hole?
Thanks for the help
Will unplugging the EGR valve prevent exhaust from circuilating to the EGR cooler ? (sorry for the stupid questions, not to savvy on my motor yet)
I am planning to do the EGR cooler delete soon
Once I perform the EGR cooler delete system, is it necessary to only unplug the EGR (before startup)and leave it in place to plug the hole or is it a better idea to completely remove it and plug the hole?
Thanks for the help
Elder User
Joined: Jun 2008
Posts: 724
Likes: 2
From: Sarasota, fl
.... but the hot exhaust gas still goes in your EGR cooler, because the valve is on the "wrong" end of it.....
Senior User
Joined: Sep 2007
Posts: 193
Likes: 0
From: Rexburg ID
true, but it will keep at least most of it from flowing to the intake. It will likely cause soot/heat buildup in the cooler which is no big deal until it leaks from excessive heat. since yours is an '04 and not an '05+ the up pipe is not restricted, so flow is not a big problem. it's a temporary fix to stop egr. the heat could also boil the coolant, but I'm not sure how big of an issue it is compared to leaving the system alone. If you're not too worried about ruining the cooler or egr valve, just unplug it. worst case is you pull a check engine light other than as noted above.
Fleet Owner
Joined: Nov 2003
Posts: 27,890
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The EGR valve is designed to equalize the forces from the exhaust pressure that act on the EGR valve. The exhaust flows into the valve from beneath the sealing plates and above the sealing plates (top and bottom of the EGR valve mechanical components). This is done so that the EGR valve does not have to fight against the exhaust pressure when opening.
That being said, these forces are never completely equal - This is mainly true in non-steady state conditions. Simply said, the EGR valve can open up when it is unplugged. It would take some weakness in the EGR valve actuator. Also, it will stay open if it is unplugged while it is in the open position.
That being said, these forces are never completely equal - This is mainly true in non-steady state conditions. Simply said, the EGR valve can open up when it is unplugged. It would take some weakness in the EGR valve actuator. Also, it will stay open if it is unplugged while it is in the open position.
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Logistics Pro
Joined: May 2004
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Excellent. So my best bet is to perform the EGR cooler delete. I am kinda slow this morning. Once the delete is done, do I simply unplug the EGR (motor off) and leave it in place or do I physically remove it and plug the hole?
Thanks for all the great information. You guys are awesome!
Thanks for all the great information. You guys are awesome!
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Elder User
Joined: Dec 2007
Posts: 813
Likes: 6
From: Up Nort Minnesota
might have to leave it plugged in so the truck still thinks it's doing it's groovy smoke inhalation thing? I'm trying to figure that out myself. None the less I think i'd at least take it out & clean it even if you are blocking exhaust gas flow further upstream from the valve. Just to ensure full easy travel of the valve if you leave it plugged in so the truck still thinks it's doing what the government wants it to do.
but hey, I'm just a student in all this. trying to figure it all out myself.
Good luck.
but hey, I'm just a student in all this. trying to figure it all out myself.
Good luck.
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Thread Starter
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Logistics Pro
Joined: May 2004
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Cool. I talked to a company that makes the delete kit and they recommend just taking it out.......but they also recommend owning an SCT tuner to rid the truck of the CEL.....what do you other gurus think?
Coincidentally, how do you clean the EGR soot from the valve, bunch of brake-kleen or what do you guys use?
Coincidentally, how do you clean the EGR soot from the valve, bunch of brake-kleen or what do you guys use?
Elder User
Joined: Dec 2007
Posts: 813
Likes: 6
From: Up Nort Minnesota
there is a nice write up in the tech folder about cleaning the valve.
I agree with carb cleaner over brake cleaner.
but the write up covers other questions you will have when you actually go to do this (like how to get the damn thing off, gasket, o rings etc)
I agree with carb cleaner over brake cleaner.
but the write up covers other questions you will have when you actually go to do this (like how to get the damn thing off, gasket, o rings etc)