AMC Eagle Den Forum
The Mighty 258 => Exhaust System. => Topic started by: kevindpm61 on May 02, 2016, 12:41:46 PM
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My son's SX'4 had an exhaust leak from the manifold to header pipe that was present after initial cold start-up. I finally was able to remove the nuts and take off the header pipe. The pipe mounting surface looks good. The exhaust manifold doesn't need a separate donut as it has the concave mounting surface. Anything that I can do to improve sealing when I bolt it back together? I was thinking about applying some Copper RTV around the exhaust pipe flange. Not sure if it would hold up in this application.
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I've decided to not use high temp RTV for reassembly. Did some research on the web and spoke with the folks at Wurth. I think that I'm going to give their exhaust assembly paste a try. The rep that I spoke with said that it was a perfect application for this job. I'll report back once the car is up and running.
http://www.shopwurthusa.com/wurthstorefront/Chemical-Product/Miscellaneous/Exhaust-Assembly-Paste-4-94-Fl-Oz-Tube/p/0890100045#
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Good luck! I'm interested to hear how the paste works. When I first got my car running, I had an exhaust leak at the same spot. Turned out the first shop just did a poor job of getting the nuts tightened on there good. Second shop had it fixed in no time.
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The link states that the paste becomes metal hard and seal permanently. I'd be worried about not being able to separate the exhaust after using that stuff.
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I asked the manufacturer about whether the parts could be taken apart and if the sealant could be removed if necessary. I was told that parts can be removed. and that it can be removed using a grinding stone or flap wheel.