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Need EGR plugs for M1 Intake P4510016

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Old 07-13-2014, 09:27 AM
AtomicDog AtomicDog is offline
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Default Need EGR plugs for M1 Intake P4510016

Woohoo! Just got lucky and picked up good used M1 intake manifold P4510016 off my local craigslist that I plan to use with my upcoming 408 build. It came with the bulk of the install kit hard parts, but not the EGR plugs. There are 2 spots I'd like to plug - the very rear of the intake, where the EGR tube attaches and along the cast portion of the EGR tube as it makes its way to the intake plenum. Does anyone know right off what the thread size is of these holes, so I can find a plug for them?
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Old 07-14-2014, 09:18 PM
AtomicDog AtomicDog is offline
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Anyone with an M1 intake with EGR provisions have any thoughts on this?
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Old 07-14-2014, 09:36 PM
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Just make a blank plate to cover the EGR port.
Use some gasket to bolt it on.
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Old 07-14-2014, 10:49 PM
AtomicDog AtomicDog is offline
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I'm aware of the plate to plug the EGR port and I plan to take care of that. The main issue I have is that there is a threaded port in the cast-in EGR tube of the intake manifold that leads to the intake plenum that must be plugged - if not, I can see one heck of a vacuum leak. Was just wondering if other owners of the M1 EGR intake know what thread size/pitch that plug is?
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Old 07-15-2014, 12:36 PM
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That port leads up to where the egr valve bolts on. if you put a plate over that spot, it will cover any holes into the intake. So, no vacuum leaks. (but, a nice plays for wasps to make a nest...... at least, until the engine warms up. )
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Old 07-15-2014, 02:12 PM
AtomicDog AtomicDog is offline
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There is another port further up the cast-in EGR tube of the intake that has a spot for a threaded plug. I can see a leak there for sure, regardless if there is a plate over the rear. Perhaps a photo of the intake and area in question will help?
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Old 07-15-2014, 04:10 PM
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Post a picture of the port you need to plug. If it's the same as the one on my EGR kegger I can measure it for you.
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Old 07-15-2014, 11:51 PM
AtomicDog AtomicDog is offline
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Please see the attached photo areas marked in red. This is where I'd like to place threaded plugs, but just need to know the thread size/pitch.
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File Type: jpg DodgeM1EGRintake1-edited.jpg (39.9 KB, 16 views)
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Old 07-16-2014, 10:43 AM
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Congrats on the M1 AtomicDog!! I don't have the EGR one, yet with a visual look at your picture it kind of resembles similar size to the heater outlet size. Shown here to the left of the coolant pipe.

Click the image to open in full size.


Have you thought to call Mopar Performance to ask? I have in the past and they were great. Any chance you can just go to autoparts store to have them pull the EGR fitting to test fit (bring the M1 with you)? Sorry if that is dumb suggestion as I don't know what the EGR fittings look like anyways.

You'll get this in though, I'm sure of it!
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Old 07-16-2014, 10:45 AM
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Three spots need plugged. The two you have highlighted, and also the port where the egr valve actually sits. Two of them are more than likely pipe threads. Should be able to get plugs at any hardware store. (take the manifold in with you....) have to make a plate for the valve area.
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Old 07-16-2014, 07:29 PM
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The spot where you have the arrow is 1/2"-14 NPT. My kegger doesn't have the one you circled. WK had a good idea for comparing it to the heater outlet. That is 3/8"-18 NPT.
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Old 07-17-2014, 07:09 AM
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Thanks for the additional ideas folks. I thought those ports may have been a metric thread, but wasn't sure. I'll test fit some 1/2"x14 NPT and 3/8"x18 NPT plugs and see if they work.
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Old 07-22-2014, 10:32 PM
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Lets see some pictures of your new m1 and the install... Help the forum like its helping you..lol
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All that work and no pics?
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Old 07-22-2014, 10:32 PM
 
 
 
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