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General E46 Forum
This is the place to get answers, opinions and everything you need related to your E46 (sedan, coupe, convertible and wagon) BMW!

View Poll Results: Have you ever used Seafoam?
Yes, I highly recommend it. 51 38.35%
Yes, But I dont recommend it. 7 5.26%
No, But I have thought about it. 51 38.35%
No, I would never do it. 9 6.77%
No, I have mixed feelings about it. 16 12.03%
Multiple Choice Poll. Voters: 133. You may not vote on this poll

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Old 04-27-2008, 07:31 AM   #81
wasp9166
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im not really sure why anyone would wana run this stuff thru their engine
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Old 04-27-2008, 09:47 AM   #82
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same here

I used it also a few weeks back. First I used it on my commercial lawn tracktors and it smoothed them right up. Next was the bimmer. Not alot of smoke came out but some black water started to exit the muffler. Not like when normal condensation comes out. Next day I got the light. Checked the codes and its the lean bank 1 and 2. My bmw tech said maybe the o2 sensors or a vaccum leak but to change the o2's first. Wonder if the seafoam fouled them with the carbon deposits it removed.
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Old 04-27-2008, 10:08 AM   #83
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i would try running your car for a few days first before you go and change the o2 sensors. After I ran some seafoam through my car, it gave me a CEL light. I ran with it for a day or two and then it went away.
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Old 04-27-2008, 10:11 AM   #84
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I also had to change my 02 sensors soon after running the Seafoam, but I figured since I was between 85k and 100k miles, I would need to do so anyhow.

It's recommended you do an oil change real soon by everyone who has run Seafoam, and I would also do plugs. However, you should consider coils and o2 sensors if your miles are on the higher side and you have not already done so. If not, you may start having rough idle and cold start issues too. I only say MAY have these. I began having these after the Seafoam, as well as some acceleration hesitation, but after doing those maintenance items, the car is now running 20k miles PERFECT. Smooth as the day I bought it.
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Old 04-27-2008, 10:12 AM   #85
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Drive it for a week, after a Seafoam treatment it's common for O2 sensors to foul. After a week of driving the residue that is fouling the sensors will usually burn off. +1 on doing an oil change. Seafoam releases engine deposits/ gumming into the oil.
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Old 04-27-2008, 10:25 AM   #86
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So we've got multiple examples of cars running badly and putting up codes after using Seafoam.

Good to know.
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Old 04-27-2008, 10:38 AM   #87
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+1 the risk of a "check Engine soon" light and needing to replace O2 sensors has me avoiding Seafoam. Immediately prior to an oil change, consider using a engine cleaner (usually has Kerosene in it). This does a good job of dissolving bits in sludge and varnish in the engine. The label should instruct "pour in engine and run several minute before draining oil". I used some yesterday as part of my oil change and found the engine runs like new.
Techron will do the same cleaning and good carbon cleaning, but you need to use it over a longer period of time.
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Old 04-27-2008, 10:54 AM   #88
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i used seafoam running through the brake booster vac line and my car gets better milage now when i just cruise. butt dyno says it feels peppier and i did have a CEL on but that was because i had the brake booster disconnected.

can't say that i regret using it at all. now that i know how sweet it works i seafoamed both my parents car and my sister's car and my other car.

i just can't seem to get that billowing smoke that everyone gets.. lol oh well
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Old 04-27-2008, 11:38 AM   #89
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my car is at 103,000 miles, and its been a month since i did the seafoam. the light went away one day for a while but then was back. i'm gonna change the o2 sensors.
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Old 04-27-2008, 12:06 PM   #90
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trhanks guys. im gonna do an oil change monday and wait for a few days beforew i change the o2's.. hopefully it will go away. the deposits should burn out.. ill let you know what happened.
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Old 04-27-2008, 12:39 PM   #91
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run good gas and beat the hell out of it, keeps it clean
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Old 04-27-2008, 03:06 PM   #92
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yeah it should go off after a few days, seafoam is a great product i ran it on my durango which had a check engine light and the seafoam made it go away. also next time wait till your car is high in mileage before you seafoam it i say over 100k and then change the spark and 02 your car will run much better then.
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Old 04-27-2008, 05:55 PM   #93
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oh, mine has 104 k on it. but i had the CEL after i use the sefoam and nor before.. i guess it helped you get rid of it..

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yeah it should go off after a few days, seafoam is a great product i ran it on my durango which had a check engine light and the seafoam made it go away. also next time wait till your car is high in mileage before you seafoam it i say over 100k and then change the spark and 02 your car will run much better then.
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Old 04-27-2008, 06:12 PM   #94
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Quote:
Originally Posted by wasp9166 View Post
im not really sure why anyone would wana run this stuff thru their engine
me either.

to the OP, did you run the code yet? that would have been the first thing i did, you're running blind until you know what the code is.
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Old 04-28-2008, 06:01 PM   #95
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so good news, the CEL went away.. thank god!
the car does run better than before...
maybe it was worth it.
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Old 05-11-2008, 07:39 AM   #96
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Seafoam Deep Creep versus CRC MAF spray

I am not able to find the spray version of Seafoam (Deep Creep) used to shoot into the intake to clean the throttle body and idle position sensor as described on some posts (Yes, I have done the hot soak already with the liquid Seafoam). I have a can of CRC MAF cleaning spray. I assume I can use this in the same way as Seafoam Deep Creep?

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Old 05-11-2008, 08:03 AM   #97
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KrisL posted a good DIY on cleaning the MAF sensor here:

http://www.bimmerfest.com/forums/sho...d.php?t=214439

I haven't done this myself but I would use Kris' method of taking it apart and cleaning it vs. spraying it into the intake with the engine running.
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Old 05-11-2008, 08:08 AM   #98
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Yes, thanks, good post for MAF, but my question is...

I already cleaned the MAF by taking it off. What i am trying to do is the Deep Creep spray method of cleaning the throttle body and idle position sensor as described in this DIY:

http://forum.e46fanatics.com/showthr...ht=seafoam+diy

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Old 05-11-2008, 09:06 AM   #99
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Just take the TB, ICV and DISA off along with the intake boot and MAF sensors and cleaned them all out using MAF sensor cleaner and intake cleaner and a toothbrush. Spraying it and letting it soak will not help, you need to brush the gunk off!
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Old 05-22-2008, 09:56 AM   #100
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cool...now i want to try this
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