 SS exchangers |
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| StratPlayer |
 Jul 6 2017, 07:11 AM
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StratPlayer  Group: Members Posts: 3,325 Joined: 27-December 02 From: SLC, Utah Member No.: 27 Region Association: Rocky Mountains 
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Great write up PMB has done on SS exchangers. My car is in for some work and they discovered this problem with my exchangers.
Folks with SS exchangers should give a look. https://www.facebook.com/PMBPerformance/pho...9673193/?type=3 |
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| 914_teener |
Jul 6 2017, 10:45 AM
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#2
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914 Guru Group: Members Posts: 5,264 Joined: 31-August 08 From: So. Cal Member No.: 9,489 Region Association: Southern California |
Here is how to fix it. These should be TIG welded only with Argon and a large diffused gas cup.
Mark the location of the ear BEFORE removing anything. I welded mine with a make do fixture sorry no pictures. .I did it right before I got married. Clean the pipe and parts THOUROUGHLY until the passive layer of the stainless is bright inside the exhaust and out. Plug the exhaust pipe at one end and make a purge chamber from a tee on your flowmeter. This will fill the pipe with Argon so the back side of the weld will be free from oxidation or inclusions. Reweld the ear on the fixture ....I used an old head. Tack it all up post purging your tack welds with the TIG torch. Weld it ALL around to avoid any crevices. You will have to re true the mating surfaces as just this little welds will want to move the stress drawn tubing as the welding will do this so avoid avoid overheating the weld. Sorry.... no pics but this is what I did and no problems since. I saw this particular weld as bad manufacturing design. |
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Posts in this topic
StratPlayer SS exchangers Jul 6 2017, 07:11 AM
GeorgeRud Important information! Please be sure to have... Jul 6 2017, 07:47 AM
Mark Henry
Important information! Please be sure to hav... Jul 6 2017, 07:57 AM 02loftsmoor I haven't been on in a while,, what's goin... Jul 6 2017, 07:59 AM Shadowfax Yep. Mine looked almost that bad. There were some ... Jul 6 2017, 08:48 AM 914_teener This is a typical result of crevice cracking from ... Jul 6 2017, 09:39 AM 914_teener Mine did the exact same thing. Jul 6 2017, 09:40 AM Spoke Mine cracked as well. Jul 6 2017, 10:12 AM rhodyguy Over torquing to cure a leaky he does a nice job o... Jul 6 2017, 11:22 AM North Coast Jim Both of mind cracked the same way. One was welded ... Jul 6 2017, 01:24 PM |
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