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      08-12-2014, 12:15 AM   #17
Cabobimmer
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Drives: E90 325i
Join Date: Feb 2012
Location: Cabo San Lucas

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I didn't see this post before and I did the seafoam treatment today. I have the same engine but I don't know if all of you have the 3 stage manifold with 2 DISA valves.

I unplugged the Vacuum Break Booster line out and definitely I felt suction from it so I poured slowly the seafoam in that line. The engine didn't shake or do anything different. I rev the car too 2k while seafoaming and then turned the engine off for 5 minutes and no smoke at all, left it for 15 minutes and still no smoke so I think the seafoam cleaned nothing. I put half of the can into the fuel tank and after driving I felt HUGE difference no more hiccups!

I am thinking on doing it following this DIY but my car has a 3 stage manifold with 2 DISA VALVES so I think the seafoam won't get inside of all the cylinders.

When I changed my starter I saw my valves and they all have carbon build. I I pour the seafoam with the oil will do the trick of cleaning the valves or there is no way to do it and get all of the valves clean?

Thanks to all 😉
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