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How to: Running Seafoam through Vacuum (91-94 Explorers with Pictures)

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Old 05-08-2007, 11:47 PM   #1
Bmwz389
Iowa
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How to: Running Seafoam through Vacuum (91-94 Explorers with Pictures)

Ok, so for a while I've been meaning to test out SeaFoam on my truck. Well, I finally got to it about a week ago, then got caught up with writing a thread on a how to.

All I hear is about running it through your Power Brake Booster line, or through your main vacuum line.

Now, if you look at the diagram of the vacuum routing on the core support that the MAIN VAC is the PCV valve. Now, both of those are so far back into the Upper Intake Manifold that they wont reach the front 4 cylinders. So, after crawling in the engine bay, I have found a very efficient and easy way to run it while hitting all 6 cylinders.

It's a nipple that hooks up onto your emissions system that runs to your charcoal canisters.

First you want to start off by removing one side of the intake tubing. Use a standard screwdriver.



If you want, you can pull the whole tubing but it's not necessary, just kind of lift it above the throttle body and let it rest there.

Next you are going to remove the emissions line from the nipple. It's located on the bottom right side of the throttle body.



Use a spare vacuum line, or use what I used. Take the vacuum line (black with yellow stripe) off of the upper intake box's bi-metal sensor. It runs down to a tubing that helps your engine warm up faster in the winter. I just used that because my tubing broke and therefore the line was useless.

Then plug it into the nipple.



Make sure you have the line clear of the belts, you don't want to catch it and tear things up lol.

Make sure you re-connect you intake tubing on the throttle body.

Next, set the can somewhere stable so you can use one hand to accelerate the engine and the other hand to feed the line into seafoam.

NOTE: This will smoke like crazy if it is your first time. I did mine for the first time outside my house and I was in front of my driveway and couldn't see my house at all (I really wish I could have recorded it...sorry guys)

This video is the second time, I only ran half a can and dumped the rest into my oil before an oil change.

YouTube - Broadcast Yourself.
If you are able to see this message it means that you don't have flash installed or that the video server is down.

Let it sit for 5 to 10 minutes. I put my sylvania 3157's in while it sat.

After that, make sure you pull the vacuum line you used, and put everything back together. Drive around for a while, maybe hit the interstate and blow all of it out.

P.S. - Don't hate the flaky paint...first time high temp project lol.

Good luck!!!

- Brandon




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Old 05-09-2007, 08:51 AM   #2
Jason94sport
South FL
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That's where I run mine through.




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Old 05-09-2007, 01:26 PM   #3
pknopick
Stone Mountain, Georgia
 
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Very nice write up! I'll try mine through that line next time... Thanks for the info.
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Old 05-09-2007, 09:32 PM   #4
Bmwz389
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Any time guys. That's why this forum was started =)

I'm glad to be of help for people!




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Old 08-15-2008, 06:13 PM   #5
Potomac30
IRMo, SC
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This post is worth a bump... I used the same port to add seafoam to my intake. It was a lot easier for me because I removed the air conditioner compressor a few years ago. I decided to try the seafoam (which smells an awful lot like charcoal lighter fluid) after I installed a home-made pcv catch can.
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Old 08-17-2008, 08:24 AM   #6
96XLTRanger
Connecticut
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I didn't see this thread but used the same exact method on my 4.0 OHV ranger and let the engine suck like 12/16ths of the can in, and then put the rest in my gas tank. i let it sit for about 45 minutes and got a lot of smoke, and drove it, but didn't feel any difference in performance. I guess my engine is already pretty clean. It sounded god awful and almost stalled several times. just keep the rpms at like 1800-2200. Theres a vacuum on the line going to the charcoal cannister too. i put the seafoam can ontop of my radiator and it was balanced, used my left hand to rev, and used a finger to block off the line going to the cannister




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Old 12-02-2010, 08:33 PM   #7
94EDBR
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I tried this on our 1994 Eddie Bauer (owned since new) Have been running synthetic oil since 1998 so the internals were pretty clean already. Didn't get a huge amount of smoke out of it. Next time I might use more but erred on the side of caution as I didn’t know how much would shake loose the first time. If you have an ohv 4.0, this is the way to inset it. Very easy.
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Old 02-02-2011, 12:14 AM   #8
kidd666
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i know its an old post but i was wondering if someone would take a picturre of what hose to put the seafoam in?
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Old 03-04-2012, 06:24 PM   #9
ryan_dawg1
Idaho
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do you know if this method would work on a 98 ohv?
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Old 03-22-2014, 12:50 PM   #10
Rupert8
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Hello,

Do you leave the intake tubing off when adding the Seafoam while the engine is running?

Thanks,
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Old 03-22-2014, 05:05 PM   #11
AP9
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Quote:
Originally Posted by Rupert8 View Post
Hello,

Do you leave the intake tubing off when adding the Seafoam while the engine is running?

Thanks,
No
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