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    Thread: DIY - Exhaust Leak Test (Seafoam) - Find Exhaust Leaks

    1. Moderator groggory's Avatar
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      05-23-2012 07:05 PM #26
      Quote Originally Posted by 1.8tguy94 View Post
      I also had a bit of smoke behind the engine...maybe its normal?
      Nope. You have a leak! :-) That's what this test shows.

      Go do the test again. This time put a rag loosly in the tail pipe. Get out some mirrors or whatever you need to figure out exactly where the smoke is coming out.
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    2. Member 1.8tguy94's Avatar
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      05-23-2012 08:47 PM #27
      Blah. I'll have to try it again. Haha

    3. Member jason bouchard's Avatar
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      05-28-2012 05:14 PM #28
      I just did it using this procedure, I got a CEL while it wass sucking up the stuff but the CEL went away after I had it sit (before the restart and rev / smoke)

      I had smoke from the turbo area as well which sucks because I just installed a new gasket with my new downpipe and really tightened the DP down really tight and well.

    4. Member 1.8tguy94's Avatar
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      05-30-2012 12:28 AM #29
      hmmm, sounds like a lot of people have this same issue. I bet its probly the same problem too. I will have to try sea foaming again once I have a bit more money and see if I can see exactly where its coming from!

    5. Moderator groggory's Avatar
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      05-30-2012 03:32 AM #30
      Quote Originally Posted by 1.8tguy94 View Post
      hmmm, sounds like a lot of people have this same issue. I bet its probly the same problem too. I will have to try sea foaming again once I have a bit more money and see if I can see exactly where its coming from!
      There are lots of places to leak... That's why this test is so good. It finds them
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    6. Moderator groggory's Avatar
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      05-30-2012 02:21 PM #31
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    7. Member jason bouchard's Avatar
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      05-30-2012 03:11 PM #32
      what kind of damages happen from a leaky downpipe ??

      the car isnt loud and makes full boost (20 psi) and runs great/ doesnt spike at all

    8. Member turbo2205's Avatar
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      06-11-2012 05:44 PM #33
      thanks to seafoam my misfire woes are finally over ...for now

    9. 07-12-2012 09:10 PM #34
      Seafoaming is NOT 100% safe... If you follow the directions you won't have troubles, if you get overly ambitious with it and the vacuum tube sending it through your intake it is possible to hydro-lock your engine. However, if you do it like the instructions say, and TAKE YOUR TIME, it's fine. When I did it (after reading a couple horror stories about it) I was so nervous about it that the second my engine started to grumble I pulled it out and let it get back to normal idling.

      As far as changing your oil... I would judge by how much smoke you have coming out. If the smoke is an indication of how much is being cleaned out of your engine, then the same amount of "trash" is being wash out of your engine and is ending up in your oil pan.. Also since the SF is much thinner a liquid than oil, using it will also thin out your oil. I'd recommend changing your oil after doing a seafoam treatment.

      When I discovered seafoam I asked my dad about it (he's a old classic car 'merican muscle gear head from back in the day).

      People used to run mineral spirits through their engine... Same as we do with the seafoam, intake, gas and oil. He explained that it did the same thing as seafoam.

      Some of the old tricks still work perfectly well on new cars.
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    10. Member NJ1.8T's Avatar
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      07-30-2012 04:59 PM #35
      I think and believe that when you use SeaFoam to check for leaks that it always shows a little smoke coming from behind the engine. I think it might not be a leak but just the burning of it. I know my exhaust is tight as we just did a big turbo build and everything was tighten down correctly but still had very little smoke coming from behind the engine bay area. I think its just a burn off of some sorts.
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    11. Member 1.8tguy94's Avatar
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      07-30-2012 10:43 PM #36
      I totally agree with you! Im starting to think that as well! Everyone seems to get that small amount of smoke there.

    12. Moderator groggory's Avatar
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      07-30-2012 11:10 PM #37
      Quote Originally Posted by 1.8tguy94 View Post
      I totally agree with you! Im starting to think that as well! Everyone seems to get that small amount of smoke there.
      I disagree. Any smoke means a leak.

      Put a rag loosely in the tail pipe to increase exhaust pressure and you'll see where the leak is even more clearly
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    13. Member 1.8tguy94's Avatar
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      07-31-2012 12:03 AM #38
      I did do that, there wasn't really any precise area...im thinking theres a greater valve or something that lets exhaust air or something out (I could totally be wrong though). My mechanic wasn't concerned about it really and thought that it might be normal as well.

    14. Moderator groggory's Avatar
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      07-31-2012 11:32 AM #39
      Quote Originally Posted by 1.8tguy94 View Post
      I did do that, there wasn't really any precise area...im thinking theres a greater valve or something that lets exhaust air or something out (I could totally be wrong though). My mechanic wasn't concerned about it really and thought that it might be normal as well.
      It's not normal. Think about where the smoke can possibly come from. You shouldn't have any.

      However, he's right... A LITTLE won't kill you. I bet your flex pipe is leaking.a little bit.
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    15. Member 1.8tguy94's Avatar
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      07-31-2012 11:57 AM #40
      yeah its hardly any at all, it could be that, I guess I didn't pay attention to that. I bet it was

    16. 08-02-2012 10:56 PM #41
      Mine was leaking from the gasket that the turbo and the manifold mounts together. I used a mirror while using seafoam to search for the smoke leak and found it. I was going to replace the gasket and then found out that it turns out that one of the three bolts where loose and i tightened it and fixed the leak. also gained 3-4 lbs of boost. you have to remove boost hose and heat shield to access the third bolt.

    17. Member 1.8tguy94's Avatar
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      08-02-2012 10:59 PM #42
      hmm, Ill have to see if its loose!

    18. 08-27-2012 03:28 PM #43
      FYI on the bottle. If you sea foam in the crankcase aka put in your oil, it's recommended you change the oil AFTER due to removing impurities. Don't change your oil then add sea foam. This is wrong an allows the impurities to remain in the engine

    19. Moderator groggory's Avatar
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      08-27-2012 03:41 PM #44
      Quote Originally Posted by 1FlyGuyInaGLi View Post
      FYI on the bottle. If you sea foam in the crankcase aka put in your oil, it's recommended you change the oil AFTER due to removing impurities. Don't change your oil then add sea foam. This is wrong an allows the impurities to remain in the engine
      This is true. But this use of seafoam is NOT AT ALL the point of this thread.

      The use of seafoam in this thread is to find exhaust leaks.

      OTHER USES OF SEAFOAM INCLUDE:
      * Fuel Treatment
      * Oil Treatment
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    20. 09-05-2012 07:47 PM #45
      I treated my car this evening and noticed about the same amount of smoke coming from behind the engine as from the muffler. I thought that was strange so I searched and found this thread. Looks like I may need to take the car to my mechanic. I used a mirror to try to find where it was coming from and couldn't, so I'll leave it to the expert I guess. I have been having strange issues with my car so a leak may be the problem.
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    21. Moderator groggory's Avatar
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      09-05-2012 07:53 PM #46
      Quote Originally Posted by Rockin3.2 View Post
      I treated my car this evening and noticed about the same amount of smoke coming from behind the engine as from the muffler. I thought that was strange so I searched and found this thread. Looks like I may need to take the car to my mechanic. I used a mirror to try to find where it was coming from and couldn't, so I'll leave it to the expert I guess. I have been having strange issues with my car so a leak may be the problem.
      Have a friend hold a rag lightly in the tail pipe to create some exhaust backpressure...

      then do the mirror/ flashlight diagnosis of where the leak is coming from.

      Doesn't take a mechanic to see where the smoke is coming from.
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    22. 10-12-2012 10:28 PM #47
      Subscribed for mah dukes' 5-speed, turbo Beetle.

    23. Member CesarinGTI's Avatar
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      05-09-2014 01:24 AM #48
      necroing this post...

      is the IM the only part were seafoam goes?
      I have seen people do this thru the booster.. Guessing that runs thru a vast part of the vacumm lines.....
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    24. Moderator groggory's Avatar
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      05-09-2014 02:25 AM #49
      Yup

      Just the IM
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