1. Home
  2. ⏣ General Metalworking
  3. Welding Cast Exhaust Manifold

Welding Cast Exhaust Manifold

The cast exhaust manifold seems to be a good quality cast iron,
meehanite type material, can I weld a small (0.5" Dia) mild steel plug
into it using a stainless steel rod or some other special rod?
David
Reply to
Mastic
Loading thread data ...
What you do depends on where it is. If you can get a tap into the hole and tread it then a cold as opposed to a welded fill is safer, ie less likely to have distortion or cracking. Welding cast iron needs to be heated slowly to say 350 Deg centigrade then weld then cool slowly. much more effort thyan a cold way of doing it. Any chance of a picture? so we can advise better?
Reply to
Ted Frater
It does have a 1/2" UNF thread in the hole but I want to make sure the plug doesn't come out. I was machining off "Extra" metal to lighten it and found that I had machined off the EGR cast in port. I opened it up and taped it. I can take a picture if it really helps.
David
Reply to
Mastic
"Mastic" wrote: (clip) It does have a 1/2" UNF thread in the hole but I want to make sure the
^^^^^^^^^^^^^^^^^^^^ In that case, I suggest, as Ted Frater did, using a threaded plug. You could secure it with tie wire, or else just hit it lightly in a couple of places with nickel arc rod.
Reply to
Leo Lichtman
Get a 1/2in unf allenscrew and screw that in with exaust muffler repair cement in the threads. This will lock it in once its been run. Wont come out.
Reply to
Ted Frater
Why not just use an ordinary machine screw, grind it almost flush on both ends, and then peen it over a bit? That will lock it for sure and with little hassle.
For that matter you don't need a screw. Just drill a round hole to fit a piece of mild steel rod, and grind and peen that in.
-- Ed Huntress
Reply to
Ed Huntress
"Ed Huntress" wrote: (clip) For that matter you don't need a screw. Just drill a round hole to fit a
^^^^^^^^^^^^^^^^^^^ Ed, why go to extra trouble to remove a thread that going to help?
Reply to
Leo Lichtman
I haven't followed this closely so, if there is a clean thread to begin with, the answer is, you're right, there is no need. Just use an ordinary screw -- the cheaper and softer, the better.
-- Ed Huntress
Reply to
Ed Huntress
Yes. Most manifolds are a nickel steel casting. Preheating with a rosebud (or in an oven) and tigging with stainless works pretty well.
Reply to
clare at snyder.on.ca

Further Reading

  • Welding two Cast Iron Exhaust Manifolds Together

  • I have a 1950 Ford Truck and want to cut an exhaust manifold in half and weld it...

  • Exhaust manifold modification

  • Hi folks,I need to modify an exhaust manifold. When I say "modify", I don't...

  • cast iron exhaust pot

  • Bit of a long shot, but I wondered if anyone has a cast iron exhaust pot...

  • Cast iron exhaust manifold repair....what to use?

  • I have a crack on a cast iron exhaust manifold on an older car that I'd like...

  • Cast iron for engine tubo exhaust manifold??

  • I want to get a cast iron turbo exhaust manifold copied. The stock ones,made by...

  • Modifications to Cast Iron Turbo Exhaust Manifold

  • I have an old exhaust manifold for turbocharging a vintage BMW and...

  • Kubota exhaust manifold

  • This past weekend I made a stupid move. I was pushing some downed treebranches...

  • Exhaust manifold modification

  • Hi folks,I need to modify an exhaust manifold. When I say "modify", I don't...

  • Repairing cast iron manifold

  • I have a couple of exhaust manifolds that the DPO tried to drill out brokenstuds...

  • welding cast iron radiator

  • If the radiator is a cast iron radiator then you will have a much betterchance...

  • Exhaust manifold issues

  • So I have this Detroit Diesel 3-53 in my enclosed trailer. The plus isthat I am...

  • Mig welding a cast iron manifold

  • I would like some information on welding a cast iron manifold on a boat.There is...

  • Welding rod for cast iron?

  • The gent offering a rod assortment on ebay got me thinking...Ive onlymade...

  • HP Heyford exhaust manifold

  • I am building the Handley Page Heyford kit. The exhaust stacks arestrange! ...

  • Clausing 5904 vfd conversion pictures in dropbox

  • All In a previous thread started back on 12/28 I responded about the vfd...
  • « previous thread

  • EMCO MAXIMAT 10

  • HELLO EVERYBODY, I AM AN AVID MECHANICAL AND ELECTRONIC HOBBIST. MY MACKGROUND...
  • next thread »

PolyTech Forum website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.