cast manifold

  1. lexi Member

    I`ve got a Honda Accord exhaust manifold with a lovely hair crack around the tube circumference. Gives a lovely throaty sounding exhaust. I may try to weld it as I`ve nothing to lose considering what Honda want for a new one. So maybe a job for 210 amp arc with a cast iron type rod which can be got on Ebay. I notice these rods have nickel in them. Would my stainless rods be any good? I have oxy acy to heat job beforehand and keep hot after welding to make sure it don`t cool too quick. Was going to try and remove a 2 or 3 mm section with a file to get some filler rod in without losing the fit of the fracture any comments appreciated.
  2. metal_god Member

    hey, i think ones of the guys on here attempted something like this a month or two ago so just hang around and you'll get your answer
  3. malcolm

    malcolm Hej!

    Bedford UK
    Sounds like you have the right plan. I've never stick welded, but my book suggests the nickel rods are the way forward - less prone to cracking than cast iron rods. Stainless ones wouldn't be sensible - cast iron welding is pain enough as it is so it's best to use the correct rods.
  4. Hitch

    Hitch Moderator Staff Member

    Yes, nickel rods or with a nickel content (nickel/iron) will be the ones.
    The nickel is more ductile than the iron will help absorb some of the stresses so helps prevent cracking.
    Set your machine up with the electrode -, this will help control the heat affected zones.

    As for the pre/post heat, sounds good.

    I have only done it once with mma, so by no means an expert on it!