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5.0L (1979-1995) Mustang Technical discussions on 5.0 Liter Mustangs within. This does not include the 5.0 from the 2011 Mustang GT. That information is in the 2005-1011 section.

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Old 09-04-2014, 10:06 PM   #1
Stanger444
 
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Unhappy EGR leaking coolant, how to bypass?

Posted in another thread and didn't receive many answers, so here it goes. I have a stock 1990 5.0 GT, I had to replace the gasket from my throttle body to the egr/spacer. The old gasket was caked on there so badly I used a small pneumatic grinder to get it off. In doing so I must've scratched the surfaces on both the Throttle body and the egr. I started it up and coolant leaked everywhere! Started to get drawn in through the intake and engine started to bog and almost died before i turned it off. My questions are
How do I bypass the coolant lines? I dont want any coolant at all going through so it can leak and get drawn into my engine. Do I just take those two black hoses running into the egr and 1.) Put them together somehow, or 2.) Cap them off somehow?
Secondly, reading up on this issue many people argue about what the purpose is. Assuming it is to cool the exhaust gases, people said there will be a problem of the egr getting hot and my main CONCERN, the ecu doing certain things, resulting in engine pinging or detonating and stuff. How do I avoid this? Delete the egr somehow? Just plug up the lines to it? Please someone help I am desperate!!!
Bottom line is: If i make a crossover for the two coolant hoses(simple enough), you apparently need to make sure hot exhaust gasses are not circulating in as well, how do I stop this? I'm thinking just taking off the line that feeds it and plugging it up(whichever line that is) but I read place that you will also need a pheunetioc thing, that goes in the upper intake manifold somehow and stops exhaust gasses? I don't understand please someone clear this up for me! Like even if I bought one of those delete spacers I would still have to do something with the coolant hoses and EGR stuff.
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Old 09-04-2014, 10:16 PM   #2
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phenolic spacer* is what people say you will also need.
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Old 09-04-2014, 10:47 PM   #3
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Reading up more and more, I am getting consistently more confused. So far I've found 2 things that are said to stop the EGR gasses from getting in and making things hot. The phenolic spacer( http://www.americanmuscle.com/bbk-ph...rkit-8693.html), which from my understanding goes between the upper intake and the lower. Then I also found this egr delete plate(http://www.uprproducts.com/mustang-b...delete-86.html), where the hell does this go?
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Old 09-04-2014, 10:54 PM   #4
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Just delete it. Cheapest, easiest fix.
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Old 09-05-2014, 12:00 AM   #5
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How do I go about deleting it? What do I need to plug take off etc????
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Old 09-05-2014, 01:39 AM   #6
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Get a delete plate for the manifold, an exhaust manifold cap for where the tube connects to your manifold or header, plug lines and your good. It's an easy job. If you get messed up just post photos on here and most of the guys will be able to walk you thru it.
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Old 09-05-2014, 07:28 AM   #7
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And get your EGR plate and throttle body machined or ground flat again. I don't know how bad you ground into it, but if coolant was pouring out and also getting sucked into the motor, that's going to be a big air leak and your car will run like crap.

Those seals around there need to be air tight.
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Old 09-05-2014, 04:53 PM   #8
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Click the image to open in full size. So these are the lines I found. The one was already like that, its just the end part with no hose connected to it. It's obvious where it connects to in the bundle of hoses. Do i plug this? I also found another one down right behind/below the egr diaphragm itself. Plug this one? I now understand where the egr delete plate would bolt to and why people do it to clean up the engine bay.
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Old 09-05-2014, 04:55 PM   #9
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Just click the little blank picture and it will bring you to imgur.com with all the pics i took.
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Old 09-05-2014, 09:09 PM   #10
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Well unfortunetly your photos wont open for me. But the block off plate that goes on the intake is a metal plate with two screws. (First Link) Put some perma-tex on the inside between the plate and the intake that you hit with a grinder so it doesn't leak. Trace the hoses back to their sorce and block them off. Use vacuum block off boots for vacuum line.(Second link) and finally you can run a hose from the inlet to the outlet of the cooling lines if you need. You'll also need to block off the exhaust egr port. (Third Link)Heres links to everything you'll need. Shop around and you can probably find all the parts cheaper than this.



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Last edited by bluebeastsrt; 09-05-2014 at 09:14 PM.
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Old 09-05-2014, 09:09 PM
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