Old exhaust or new? The ones I've seen go into the pipe and require an impact gun to tighten a bolt … I once built a wideband vertical dipole in a double bowtie fashion with them, but connecting them together at the feedpoint was a pain. I braze my mufflers when I split them to remove the CAT. One trick you can also use is a cheater rod. To braze i use a jeweler's torch that makes it easy to get a very tiny area very hot. ), and then take it to a muffler shop to fully weld everything together. Bullet muffler on the downpipe, straight pipe, 90° bend, out the side. The torch is not your problem. 6013 would work but 7014 might be a little better, 3/32 at the biggest. What You’ll Need: – Universal Exhaust Hanger with an open, pivoting end. Here is a way to make your own custom exhaust hanger using one of those cheapo parts store hangers.
I have actually used flux cored MIG wire to torch weld, but I found that the fluxed brazing rods work very well. Being there is no standard for the metal that coat hangers are made from they range across the spectrum of quality material.
If you did any brazing, the pipes would have to overlap. Your problem is that you need a brazing rod and some flux. Its simple, cheap, and even allows the whole system to be easily removed. MIG is the best option for strength and speed of completion. The Wire coat hangers will work! The torch will get it hot enough to braze. Take a coat hanger or beat the flux off a stick of rod and feed it in as filler. With a neutral flame on the torch it works well. Coat hangers are right out unless you have a good way to connect feedpoints to them. I don't use coat-hangers anymore for oxy-acetylene welding, back in the 70's, coat hangers were good enough steel to do so, today, you might as well use baling wire, about the same quality. They just don't solder worth a darn. Then braze-tack all the connections in several spots on each joint, (Yes! 1999 Sea Ray 290 DA with twin 5.7 freshwater cooled blocks and manifolds. You have to get the area clean. If you want a rear exit exhaust, it's going to take considerably more work and material.
Steel coat hangers get full on fusion welded as the filler material in a similar metal joint. You can't "braze" with a coat hanger. - Yes I have done it,and will do it again if necessary.
A pipe expander would definitely be useful. Not to mention the zinc poisioning. Tried to winterize today but starboard side exhaust manifold on starboard engine didn't drain any water when I pulled the blue plug out. Oh, and im welding all of my custom dual exhaust, not just the bracket I should have pics up tomorrow GradeZ28, Jan 14, 2006 #8. guitarisawesome ... You *can* just braze with coat hanger if you dont use the torch right but itll fall off real easy... you know its "welding" when you see the 3 metals flow liquid together and sparks start flying. The melting temperture on that hanger is a lot higher than the melting temperature of the muffler. (It must be this style, you’ll see why later) – 1.25 ” X 1.25″ piece of 1/8″ steel Bicycle spokes maybe a bit cleaner, and a brazing rod coated in flux is relatively cheap… Wire hangers will work fine, but the metal can be very dirty leaving pits and adhere poorly at worst. Oxy-acetylene welding, and brazing, are two different things. Brazing flows the brass rod material over/into usually lapped or fillet joints, but simply melting a steel rod over those same joints will do nothing except make a huge mess. I've also used coat hangers as emergency hangers for exhaust pipes and mufflers. I am perplexed as I have done this many times I can also use the MIG set to low and slow, and just over-lap the spots. In the … Brazing shouldn't be used on anything near the exhaust ports, because the exhaust gases run in the 1200-1500 degree F range right out of the exhaust ports. If you try to use a plain steel hanger with no coating, even the slightest amount of rust will bugger up you weld. I've used coat hanger wire as welding rod with an acetylene torch for welding sheet metal and exhaust pipe in my younger days. Welding rusty exhaust pipes with coat hangers would work just a little harder. A metal coat hanger will not do at all. Plus coat handers are made of really dirty metal. If you use brazing rod on headers, the headers will fall apart. I've used them for many different jobs with great results. Or straight pipe, muffler, turn down tip under the car. Gas welding rod (I have not bought any for couple of years) was pretty cheap,and you will find that 1/16 inch will Work better than the larger Dia. The coat-hanger thing, btw, sounds more like welding. on the package made for exhaust brazing..I guess I don't know what I'm doing once again. I usually cut the hook off and straighten a bunch at a time and keep them right in the tube with by brazing rods.
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