Posted by RN on October 22, 2013 at 09:21:24 from (126.96.36.199):
In Reply to: Exhaust noise. posted by XRogerX on October 21, 2013 at 11:37:37:
As I used to ask when working the parts counter: Make, Model, Year of vehicle and in your case what engine? And what pipe replaced? couple others pointed out some possible problems- but maybe your vehicle project has a known wear out? Some Fords with rear mounted muffler were well known for rusting muffler, GM vans with muffler toward rear also rust out on bottom. Big block ford trucks V8s had a exhaust manifold gasket that would burn out in a year if not perfect seal-and then they made it 2-3 years. Friend was replacing his on tow truck every 3-4 months and I told him the use the IHC metal doughnut- fit in perfectly and was still working 3 years later when he sold the tow truck for a rollback. Front of cat on some cross mounted GMs has a "muffler bearing" attaching to exhaust manifold- this may be what you have since you mentioned the bolts DIDN"T break when checking? Y sections of manifolds crack on inside joint- factory say replace, some people remove and weld for a extra couple years but that is still 4 hours labor- Liquid steel, JB weld and a cut open beer can and hose clamp can make it through the winter and into next fall. Really rotted inside of muffler but still tight outside double shell is noisy but not easy to see if rust is on top like where road splash tossed winter salt- then you wrap whole thing in beer cans or spend the $19.95 for a Ford N tractor muffler if it fits or the $29.95 for the Thrush at Farm and Fleet or the $24.95 Midas special almost universal- 4 parts numbers fit 85% of American cars. Teasing Alert! Or turn the radio up louder and get a set of shooter ear plugs for driver. RN
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