Will the M20 survive SEAFOAM?

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  • indecline
    Wrencher
    • Sep 2007
    • 244

    #1

    Will the M20 survive SEAFOAM?

    I have a M20B27 block with approx. 180K
    I'm suppose to use 1/3 of the can through the brake-booster/intake manny?
    Also pour it in very slowly. I've heard speculation that the use of seafoam brings up the possibility of it maybe eating up gaskets?

    Anyone care to give any pointers about this sthufff?
    I'm going to film the process and put it up in the afternoon tomorrow.
    1989 325I(M20B25US)|KAMotors CAI|Bilstein Sports|H&R Sports|ST Sways|SSSquid Tune|Red46 Sump Armor|

  • Danny
    Moderator
    • Feb 2008
    • 14217

    #2
    Mine did till it was wrecked at least.

    Made it pull harder for sure.

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    • indecline
      Wrencher
      • Sep 2007
      • 244

      #3
      anymore input or advise with this stuff?
      im gonna the M20 sip on it soon!
      1989 325I(M20B25US)|KAMotors CAI|Bilstein Sports|H&R Sports|ST Sways|SSSquid Tune|Red46 Sump Armor|

      Comment

      • indecline
        Wrencher
        • Sep 2007
        • 244

        #4


        here the link to the seafoaming...i had the beginning on tape but the tape proved faulty so its only the aftermath...
        1989 325I(M20B25US)|KAMotors CAI|Bilstein Sports|H&R Sports|ST Sways|SSSquid Tune|Red46 Sump Armor|

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        • kamotors
          R3V OG
          • Nov 2007
          • 7102

          #5
          seafoam=goodness. but reset your battery after words, mine said that my oxygen sensor was bad, and it made the car go really slow, but then i reset the battery and its faster than ever.


          7speedshop.com

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          • SpecM
            R3V Elite
            • Oct 2005
            • 4531

            #6
            -Seafoam = good. Do it.
            1989 cirrisblau-metallic 325i

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            • thereisnoyun
              R3VLimited
              • Feb 2007
              • 2301

              #7
              seafoam my car and it did great, but then again, I heard people taht had some serious issues after seafoaming.

              Comment

              • SpecM
                R3V Elite
                • Oct 2005
                • 4531

                #8
                Originally posted by thereisnoyun
                seafoam my car and it did great, but then again, I heard people taht had some serious issues after seafoaming.
                -Thats cuz they used it wrong, or their car had very bad running problems in the first place.
                1989 cirrisblau-metallic 325i

                Comment

                • Delphinitive
                  Advanced Member
                  • Feb 2008
                  • 151

                  #9
                  seafoam kicks ass. have used it on a couple different e30s and it made them all run a bit smoother and/or perform noticeably better.
                  we've run it right into the intake manifold through the vacuum line there every time..
                  i don't know if it's different than any other method, but if you do go this route you'll need to keep the revs up a bit with your free hand or have a buddy do it as the car will want to die as soon as you stick the line into the seafoam

                  i know i've seen a couple other threads about seafoam so you'll probably be able to get a bit of info with the ol search function

                  We Will Rake You

                  Comment

                  • Jon325i
                    R3V OG
                    • Oct 2003
                    • 6934

                    #10
                    I just finished giving my 325i a SeaFoam enema: a full can in the tank, half a can in the engine oil, and two more cans thru the intake. The reason for such thoroughness is I have a smog check coming up (plan on doing the sniff test tomorrow - wish me luck). My cars' drivetrain is entirely stock and so far the performance has been very good. Nothing massively noticable - it fires right up and idles smoothly, mid-range punch is only slightly down from the JC Chip I used to run yet I haven't run it long enough to note any gains in fuel economy. As I said before, I did all this primarily for the smog test. Everyone else who has tried it gave good praise and recommended it. Lets hope all goes well tomorrow.

                    Jon
                    Rides...
                    1991 325i - sold :(
                    2004 2WD Frontier King Cab

                    RIP #17 Jules Bianchi

                    Comment

                    • Jean
                      Moderator
                      • Aug 2006
                      • 18228

                      #11
                      Good luck Jon, I am sure it will pass :)
                      Mtech1 v8 build thread - https://www.r3vlimited.com/board/sho...d.php?t=413205



                      OEM v8 manual chip or dme - https://www.r3vlimited.com/board/sho....php?p=4938827

                      Comment

                      • Jon325i
                        R3V OG
                        • Oct 2003
                        • 6934

                        #12
                        Here are my test results from this morning. The car passed but it just squeeked by in the hydrocarbons department. To prepare for this test I SeaFoam'd the heck out of my car (in the tank, crankcase & 2 cans thru the intake). I also changed the oil and filter, installed a new O2 sensor and re-installed my barely used catalyst (running a testpipe most of the time). Lastly, my clutchfan crapped out a while back so I removed it and never installed another one. During the test the heat was going full blast and the tech at the testing shop put a big fan in front of my car while doing the test.

                        Now the results (all stock M20B25, aftermarket cat, 3.73LSD, 87 OCT fuel, 197,8xx miles on the clock, air temp ~60F).....



                        If the image is a bit unreadable, here are the figures....

                        15mph (indicated RPM: 1833)

                        HC (ppm)
                        Max = 108
                        Ave = 31
                        Meas = 106

                        CO (%)
                        Max = 0.71
                        Ave = 0.10
                        Meas = 0.11

                        NO (ppm)
                        Max = 767
                        Ave = 237
                        Meas = 289

                        %CO2
                        Meas = 14.3

                        %O2
                        Meas = 0.5

                        25mph (indicated RPM: 2966)

                        HC (ppm)
                        Max = 83
                        Ave = 20
                        Meas = 33

                        CO (%)
                        Max = 0.58
                        Ave = 0.09
                        Meas = 0.01

                        NO (ppm)
                        Max = 706
                        Ave = 199
                        Meas = 0

                        %CO2
                        Meas = 14.6

                        %O2
                        Meas = 0.0

                        Jon
                        Rides...
                        1991 325i - sold :(
                        2004 2WD Frontier King Cab

                        RIP #17 Jules Bianchi

                        Comment

                        • SpecM
                          R3V Elite
                          • Oct 2005
                          • 4531

                          #13
                          -I love NC. No smog tests. Just a simple visual inspection. Sooooo easy to pass...
                          1989 cirrisblau-metallic 325i

                          Comment

                          • N2MYE30
                            R3V Elite
                            • Oct 2007
                            • 5536

                            #14
                            +1

                            COTM

                            Comment

                            • soul rebel
                              Advanced Member
                              • Sep 2007
                              • 197

                              #15
                              Go for it, seafoam made a noticeable difference on mine.

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