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post #1 of 7 Old 07-30-2010 Thread Starter
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pipe problem

after removing and cleaning manifold, then brazing the copper 'tube within a tube' that handles hot exhaust and h20, i ran pipe up to the muffler. the problem is that the elbow joint that goes into the muffler has some corrosion on the threads and im having the darndest time connecting the new pipe. any suggestions? would pb blaster help? ive heard of a tool that screws in and sort of refreshes the fitting screws. any advice appreciated, this is all that is holding me up

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post #2 of 7 Old 07-30-2010
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This is a little unclear. Are you trying to screw new pipe into the flange that connects to the exhaust manifold or trying to screw the old pipe into ? Either way you can get a pipe tap or die to chase (clean) the threads.

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post #3 of 7 Old 07-30-2010 Thread Starter
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new pipe into the elbow joint coming off the muffler



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the threads in the elbow joint have some corrosion and im having trouble connecting the new pipe(the elbow off the red muffler)

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post #4 of 7 Old 07-30-2010
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Mick there is a file made for cleaning threads. I think you would have to look hard to find one though. Pipe taps & dies for larger pipe are expensive, although You could have a hardware store chase the threads on the male threads. Most would not have the tap for the female threads.

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post #5 of 7 Old 07-30-2010
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I have used a thread file before but don't think they really work that much better than a wire brush. I have also used a sacrificial piece of pipe to cut the rust out of the female part. Just file a cutting edge in maybe 4 places perpendicular to the threads using a 3 sided file keeping the cutting edge vertical (i.e taper the trailing edge). This is a home made tap, the metal isn't hard enough to cut new threads but it will remove rust and crap from the existing threads.

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post #6 of 7 Old 07-30-2010 Thread Starter
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hmmm... if this doesnt work, do you think marine grade black hose with two/three hose clamps would be sufficient if i just 'set' the pipe next to the elbow joint and clamped her down?

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post #7 of 7 Old 08-01-2010
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I have pipe taps of various sizes. What size are you looking for?


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