Good fix for the plastic egr issue on the 3.8 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 07-17-2013, 11:05 PM   #1
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Default Good fix for the plastic egr issue on the 3.8

Just did the repair and installed this hope to never do this again hope this can help others.
KEN-CO UPPER PLENUM & LOWER INTAKE REPAIR KIT PART # MR38K
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Old 07-18-2013, 07:45 AM   #2
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you can get the dorman upper kit from rock auto for that price, comes with those egr tubes and the updated manifold, new o rings, all new gaskets, etc. and most times the lower intake gaskets are bad as well. the plastic lim gaskets have to be changed to the aluminum

https://www.gmforum.com/mechanical-1...2005-a-304071/
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Old 07-18-2013, 08:54 AM   #3
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I was going to plug it off but got to wondering if the coolant wasnt actually helping keep the tube area somewhat cool, if I plugged it i figured it would definitely get hot and melt through even with a thicker walled egr port in the intake, just may take longer.
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Old 07-18-2013, 10:34 AM   #4
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Welcome to the forums, and thanks for making a post to try to help others.

I have seen this product before, but I do not think one should use this product, and think that they do not need to remove the lower intake manifold, if you are addressing issues with the EGR/upper intake manifold, and you still have the old style nylon framed LIM gaskets, then I could not see why you would ignore replacing those while you already have the UIM off, also I have heard of more issues with the LIM Gaskets, than I have of the EGR gasses causing a leak in the UIM, not saying the EGR possibly leaking is not an issue...
That product is a bit pricey, you are only getting a small thing that is the equivalent of JB Weld, the reduced diameter EGR Stove Pipe, and a small steel bushing, for 20.00 more, plus shipping, you can get a brand new UIM, with UIM and Throttle Body gasket, and with that steel busing already installed.
GM Intake Manifold Kit

Still IMO replacing the EGR stove pipe with the reduced diameter one that you get in the Fel-PRO LIM kit is enough to keep the EGR issue from happening.
And for those still worried about it happening due to excess heat, they can always plug the coolant ports that lead into the UIM.
Of course I recommend that any that do this, remove the coolant water bypass on the side of the LIM, and hog it out a bit to help keep the coolant flow rate closer to what it was without the ports blocked.
This may not be totally necessary for most, but IMO if you are going to plug the coolant ports as many do, then this is what I consider the proper way of doing so.

Even if you do not hog out the coolant water bypass area, you still do not make the motor get much hotter, I do not think the flow if reduced that much.
Once those are blocked you would not have worry about that, or the coolant ports passing through the throttle body warping, and or leaking.
You had to live somewhere constantly freezing to really need that coolant flow through the throttle body.
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Old 07-18-2013, 01:07 PM   #5
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i think if you lived somewhere cold enough for it to matter you would need a 4wd anyway. the temps here are freezing and negative sometimes for days and its always run fine. the car doesnt have a block heater either
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Old 07-19-2013, 12:11 AM   #6
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Originally Posted by jwfirebird View Post
i think if you lived somewhere cold enough for it to matter you would need a 4wd anyway. the temps here are freezing and negative sometimes for days and its always run fine. the car doesnt have a block heater either
Totally agree with you Justin!
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