Re: Can a Cast Iron Exhaust Manifold be Welded
Yes, any welding shop should be able to do it. I've welded turbocharger housings (same deal but usually they get hotter) with similar cracks and have yet to have one fail (now that I say that...I need to find a piece of wood).
I've ground out the crack, heated the part to 500 or so, welded it with high nickel rod, then stuck the part in sand or kitty litter so that it cools s l o w l y. If it cools too fast it will crack. Even putting it back in the oven and slowly turning down the heat works.
That said, are you sure you can't find a replacement part?