Leak testing exhausts off a car
#1
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Leak testing exhausts off a car
What is the proper way to leak test exhausts when you have them off a car? The setups I am building use v-bands, so should I just machine a circle of metal that I can stick in the v-band clamp and put some sort of valve on it to hook my air compressor? Then listen for leaks?
#3
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That seems like a really bad idea. Wouldn't filling an exhaust with water possibly cause it to rust faster on the inside? Would it not damage the inside of the muffler if it was full of water?
#10
pressurize it and spray vbands with soapy water. Or smoke machine, we have one at the shop it makes finding pinholes very easy but they arent cheap. I'd say your best bet is a pvc pipe cap a silicone coupler and a pressure regulator. set it to 10 psi and spray all connections with soapy water, watch for bubbles.
Edit: This method also works well for leak testing charge pipes. set the regulator to 30psi and it makes rooting them out easy. Sometimes we encounter boost leaks that only leak under pressure, and our smoke machine doesn't do anything above 10psi.
Edit: This method also works well for leak testing charge pipes. set the regulator to 30psi and it makes rooting them out easy. Sometimes we encounter boost leaks that only leak under pressure, and our smoke machine doesn't do anything above 10psi.
#11
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pressurize it and spray vbands with soapy water. Or smoke machine, we have one at the shop it makes finding pinholes very easy but they arent cheap. I'd say your best bet is a pvc pipe cap a silicone coupler and a pressure regulator. set it to 10 psi and spray all connections with soapy water, watch for bubbles.
Edit: This method also works well for leak testing charge pipes. set the regulator to 30psi and it makes rooting them out easy. Sometimes we encounter boost leaks that only leak under pressure, and our smoke machine doesn't do anything above 10psi.
Edit: This method also works well for leak testing charge pipes. set the regulator to 30psi and it makes rooting them out easy. Sometimes we encounter boost leaks that only leak under pressure, and our smoke machine doesn't do anything above 10psi.
#14
For the vband end you can take a spare v-band flange and weld a flat plate over it and weld a pipe fitting onto it with a shrader valve, on the tailpipe end buy one of the pimp silicone pipe caps they use for back purging. Put 5-10 psi in the thing and spray with soapy water.
Or you could just give it a good visual check and call it good. If a leak passes visual its going to be pretty tiny that the only way you're probably gonna find it is seeing a tiny carbon streak on the exhaust that starts at the pinhole.
Or you could just give it a good visual check and call it good. If a leak passes visual its going to be pretty tiny that the only way you're probably gonna find it is seeing a tiny carbon streak on the exhaust that starts at the pinhole.
#18
#19
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You guys are making this whole thing overly complicated. I asked because my welds are by no means perfect, some times they look like they were done by a blind 5th grader, I just want to make sure they are all good enough to keep exhaust gas in.