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BMW 3-Series (E90 E92) Forum
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Carbon/fuel system cleaning?
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12-06-2015, 03:19 PM | #1 |
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Drives: 2007 BMW 335i
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Carbon/fuel system cleaning?
Hey guys I have a question. Has anyone ever used seafoam on their e90?? I know it says only 2-cylinder and 4-cylinder engines and thats why I was wondering. If so, where did you put it in the car? Thanks.
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12-06-2015, 03:23 PM | #2 |
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Waste of time and money, plus it looks silly when you are blowing all of that white smoke out.
Just clean your intake valves with a walnut shell blasting kit or by hand. Mine at 82k miles... Before and after. |
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12-06-2015, 06:32 PM | #4 |
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Seafoam won't do anything drastic to make any changes. It may get rid of some very minor carbon build up on the piston heads, but that's about it. Do a walnut blast like XM mentioned.
I put 2 cans of seafoam through my motor (brake booster hose going into the manifold *EDIT* Meth injection port on IC pipe. lool) as a test before pulling the manifold to do my walnut blasting. And it made absolutely no difference on the intake valves. Last edited by CeeWhizzle; 12-06-2015 at 10:52 PM.. |
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12-06-2015, 07:48 PM | #5 | |
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12-06-2015, 10:51 PM | #9 |
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Hahaha. My bad. Meant to say I sent it through the meth injection port on my IC pipe towards the throttle body. Screwed in a nipple, hooked up a vacuum line and sucked it out of the bottle. But like I said, did nearly nothing at all. The valves for cyls 3/4 were slightly washed, but it wouldn't make as much as a difference as a walnut blasting since that carbon/gunk build up is quite tough.
I've used seafoam on many different vehicles via the brake booster port. Explains why I got that mixed up. |
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12-07-2015, 06:08 AM | #10 | |
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12-07-2015, 08:26 AM | #11 | |
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If you're at 82k though, I highly doubt your valves are even anywhere near clean :P Should do the walnut blasting every 30-50k. But doing your detergent cleaning every service after a walnut blasting (and getting an Oil catch can) should definitely slow the process of the carbon build up on the valves afterwards. The only problem with putting detergents in our engine is the fact that 90% of it will go through the middle cylinders (2-5) 1 and 6 will barely get touched with that stuff. I've been thinking of doing a little custom work on my intake mani for spraying cleaning detergents onto each valve chamber more appropriately. Such as drilling and threading in meth spray nozzles into each runner on the manifold (all 6 of them) about 2-3 inches from the actual valves. Then just hook up a line on each one during a service and suck the stuff through for a few seconds to really target one set at a time. Last edited by CeeWhizzle; 12-07-2015 at 08:31 AM.. |
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12-07-2015, 04:22 PM | #12 | |
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12-07-2015, 05:55 PM | #13 |
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12-07-2015, 06:04 PM | #14 |
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the occ collects oil vapors going to the intake of the turbo not intake manif. ( i.e. During boost conditions), pcv valve is shut. During vacuum conditions ( idling and decel) vapors go to intake man that gunk up the valves.
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12-07-2015, 08:56 PM | #15 | |
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Otherwise there really isn't much to do about carbon build up. Walnut blasting every 30-50k isn't that bad anyways. |
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12-10-2015, 08:36 AM | #16 |
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I wouldn't blindly follow Rob...he blindly follows others, and that can get you blown seals or a blown motor. Learn the way the system works, why it works that way, then make your decisions. Don't even take things vendors say as gospel. There has been a lot of bad info given in the N54 world from all directions. When in doubt, mod cautiously and with information.
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12-10-2015, 09:18 AM | #17 | |
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However, for intake valve cleaning during servicing, this might work. Used intake manifolds sell for under $150 on eBay. It wouldn't be expensive at all to experiment. The worst case scenario is that you ruin the $150 manifold, but then you'd just slap the your old good one back on. |
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12-10-2015, 03:18 PM | #19 |
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PI wouldn't help much if you don't hit high boost target very often, which is the case for a street car. Most of the carbon build up occurs at idle and load load use, which PI would not spray any fuel to the manifold.
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12-10-2015, 04:02 PM | #20 |
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Yeah, pretty sure those PI kits are made to be tuned to only spray under heavy loads and mid-high boost. No sense having them spray 100% of the time, just to waste extra gas.
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12-10-2015, 04:15 PM | #21 |
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12-10-2015, 04:18 PM | #22 | |
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If you want clean valves, either walnut blast at every 30k or instal PI and do a dozen track day events every year like some of us here
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09 BMW E92 335i: Top Mount EFR 7670 / Dinan / AP Racing / Wavetrac / TC Kline [Full Mod List]
07 BMW R1200S: Shine Yellow / Akrapovic / Ohlins 19 Volvo V90 T6: R-Design / Bowers & Wilkins / Polestar Optimization |
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