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.
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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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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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.
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.
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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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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Just the IM