I have a few stovebolt manifolds that have one of the ears for the exhaust pipe attaching studs broken off, but with a properly functioning heat riser valve. Simply trying to weld a stud into place usually doesn't work very well, but I think I might have come up with a better fix. How about fabricating a flange from 1/2 inch steel plate, and attaching it to the existing flange by brazing or nickel-rod arc welding, and threading replacement studs into the new flange? The repair part could either be machined for a flat gasket, or tapered for the newer style donut gasket, depending on which type of seal the engine builder chooses to use. A pretty competent welder could add a second flange and a blockoff plate between the front and rear exhaust ports to duplicate the scarce and expensive "Corvette" twin pipe exhaust manifold at the same time. Comments? Jerry
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt! There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway Love your enemies and drive 'em nuts!
Don't know the welding particulars of this. Don't know if this is the area you mention. CLICK
I don't have any parts to look at. I may be way off of the area in question. But here is a try. Feel free to Kibosh or embellish. Actual shape of threaded plate TBD. Flat gasket will seal. This will look ugly with the hood open.
Right is right, even if everyone is against it, and wrong is wrong, even if everyone is for it. - William Penn
If your welder lacks the competency to build up and re shape the ear in preparation for facing, drilling, tapping, and beveling I'm certain he lacks the skills to add another outlet. I made several split manifolds in both 1 and 2 pc. style and made a fixture to automate the process of shaping the pipe to the manifold in minutes. When one gets too many projects on their plate some things get pushed to the corner. I have been hanging on to 5 pipes I prepped for welding for over a decade now and they're in danger of heading to the scrap bin soon so if any bolter wants one send me a PM and it's yours no charge.
I agree on the "ugly" part. Since I've been brazing/welding cast iron with a fair degree of success for over 40 years, I'm a little more comfortable with adding a steel flange under the existing one. The steel will also be more durable and not prone to breakage like the cast iron flange can be. If the manifold gets powder coated after the repair, it should look pretty good as well as being functional.
I should have your 351 V6 parts on the way soon- - - -no, I haven't forgotten about them. Thanks for your patience! Jerry
Last edited by Phak1; 08/10/202412:30 AM. Reason: Removed unnecessary comments
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt! There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway Love your enemies and drive 'em nuts!
