Question about Mazda Protege
It is broken where the flange is. The pieces that hold the donut in there with bolts are broken off.
Do you mean broken off and stuck inside or broken off and fallen out? Broken off and fallen out in this case is a good thing. Sounds like you mean the exhaust is broken at the manifold but what isn't clear is which piece, the manifold or the exhaust pipe. The manifold is a part of the engine, the exhaust pipe is connected to the manifold via the flange you speak of so if it is broken (coming from the engine as a base point) before the flange you need to change the manifold (less likely - hardly ever breaks - usually made of cast iron or cast aluminium) or where they typically break just after the flange (exhaust pipes are notorious for rusting out here, you will need to replace the front exhaust pipe and donut (gasket within the flange). Due to the high heat in this area it is extremely common for the bolts holding the pipe to the manifold to not just be ceased to it (lube will probably do no good) but to actually weld (or forge if you will) themselves to the metal of the pipe, in which case you need to cut them out with a torch. A good mechanic can usually do this without damaging the manifold. That is why it is a good thing if they have broken off and fallen out, much easier to change then welded in bolts (which would not fall out). I say replace the front exhaust pipe because without knowing which year your protege is or if it has an after market exhaust I don't know for sure if it is a one piece system or more than one piece. If it is a one piece you will need to either change the whole thing or do some cutting and welding to piece a section in. In which case, I do not recommend cutting the new piece you purchase but if the old exhaust on the vehicle is in alright shape from the muffler back you may be able to section it off and just replace the front section. Piecing it together would require at least one more piece, one to contact the old pipe to the new which would also need to be welded on but this method can still be cheaper (most of the time). Anything other than a simple in/out replacement will require torches and obviously if the bolts are welded in it is not a simple in/out job.
Posted on Mar 25, 2014
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Posted on Jan 02, 2017
SOURCE: exhuast system noise
Just cut the bolts off with a sawzall, buy two new bolts and the donut and be done with it. Not worth the time to work on old bolts. Esp if you do not have a torch to heat the nuts.
Posted on Feb 08, 2009
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