OBD-II exhaust manifold material?

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  • MatRacer
    E30 Addict
    • Oct 2008
    • 562
    #1

    OBD-II exhaust manifold material?

    What is the material? can I weld on it?

    Thanks!
    E30 now S52
    2008 Suburban LTZ (Family and TT hauler)
    325xiT (Sold)

    sigpic
    Tags: None
    • herlsy
      Grease Monkey
      • Sep 2009
      • 339
      #2
      I believe its stainless steel, seems like it wouldnt be a problem to weld

        Comment

        • justin_l_
          E30 Enthusiast
          • Jun 2007
          • 1079
          #3
          Yes you can weld it. Hence welding up the air ports.

            Comment

            • 87e30
              R3V Elite
              • Jul 2008
              • 5676
              #4
              Yes, mine has been cut and welded to clear the subframe.
              Originally posted by z31maniac
              I just hate everyone.

              No need for discretion.

                Comment

                • flyboyx
                  R3V OG
                  • Sep 2008
                  • 8371
                  #5
                  they are stainless. I believe they are either inconel monel or a combinatio of the 2. They can be welded. 304 filler rod should be ok. I wouldn't use any other process other than a tig.
                  sigpic
                  Gigitty Gigitty!!!!

                  88 cabrio becoming alpina b6 3.5s transplanted s62
                  92 Mtech 2 cabrio alpinweiss 770 code
                  88 325ix coupe manual lachsilber/cardinal
                  88 325ix coupe manual diamondschwartz/natur
                  87 e30 m3 for parts lachsilber/cardinal(serial number 7)
                  12 135i M sport cabrio grey/black

                    Comment

                    • madjurgen
                      E30 Fanatic
                      • May 2005
                      • 1203
                      #6
                      ^
                      So attempting to MIG on these would end horribly?

                      As time went on, the factory developed the car each year, making it faster, more comfortable, and capable of handling at higher speeds.
                      You don’t want this. You want the trickiest, most dangerous, oldest model you can find. Only then can you prove to the world that you’re a man.

                        Comment

                        • flyboyx
                          R3V OG
                          • Sep 2008
                          • 8371
                          #7
                          have you ever tried to mig thin wall stainless steel? If you only plan to weld up the emmissions ports on the flange, I think it would be fine. I am not a master welder, but I am very good at it. I would never attempt the tubes with a mig.
                          sigpic
                          Gigitty Gigitty!!!!

                          88 cabrio becoming alpina b6 3.5s transplanted s62
                          92 Mtech 2 cabrio alpinweiss 770 code
                          88 325ix coupe manual lachsilber/cardinal
                          88 325ix coupe manual diamondschwartz/natur
                          87 e30 m3 for parts lachsilber/cardinal(serial number 7)
                          12 135i M sport cabrio grey/black

                            Comment

                            • 325Projectz
                              E30 Mastermind
                              • Jan 2005
                              • 1956
                              #8
                              the guy who welded my obd2 exhaust manifolds said if you can stick a magnet to stainless steel, then it can be mig welded, if not then use a tig. you can stick a magnet to obd2 manifolds...

                              not sure if there is any truth to this but he used a mig to weld up them up, they turned out fine.
                              91 m3

                                Comment

                                • b*saint
                                  No R3VLimiter
                                  • May 2006
                                  • 3794
                                  #9
                                  Factory inconel alloy? Post proof.
                                  Ma che cazzo state dicendo? :|

                                    Comment

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