here's a cheap little tool I got from harbor freight, its a mechanic's stethoscope, here:
http://www.harborfreight.com/mechanics-stethoscope-41966.html
I ended up getting 2 of them, thinking I would take apart one to build a air leak stethoscope of some kind. well on the second one, I cut the plastic holder around where the solid metal probe is held in, and removed the probe.
and with the probe removed, it works great to find exhaust leaks, even small ones, you don't hold it directly on the exhaust, but rather just above it and it'll amplify the sound from any air 'puffs' that you go over a good amount, making it a lot easier to find even small exhaust leaks that you may not be able to feel or hear un-aided.
the end is kinda bulky which makes searching for leaks in tight places difficult, but an extension could easily be fashioned. I used it looking for leaks on new welds when fabricating my dual 3" exhaust.
its nicer than using a piece of hose because the stethoscope ear pieces stay in place really well and let you use both hands when you need to.
I'd post pics of it after alterations, but I just moved and have it packed away somewhere so I don't have it handy at the moment.
http://www.harborfreight.com/mechanics-stethoscope-41966.html
I ended up getting 2 of them, thinking I would take apart one to build a air leak stethoscope of some kind. well on the second one, I cut the plastic holder around where the solid metal probe is held in, and removed the probe.
and with the probe removed, it works great to find exhaust leaks, even small ones, you don't hold it directly on the exhaust, but rather just above it and it'll amplify the sound from any air 'puffs' that you go over a good amount, making it a lot easier to find even small exhaust leaks that you may not be able to feel or hear un-aided.
the end is kinda bulky which makes searching for leaks in tight places difficult, but an extension could easily be fashioned. I used it looking for leaks on new welds when fabricating my dual 3" exhaust.
its nicer than using a piece of hose because the stethoscope ear pieces stay in place really well and let you use both hands when you need to.
I'd post pics of it after alterations, but I just moved and have it packed away somewhere so I don't have it handy at the moment.