 Heat Exchangers, Are the weldable? |
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| bandjoey |
 Oct 29 2011, 02:23 PM
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#1
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bandjoey  Group: Members Posts: 4,929 Joined: 26-September 07 From: Bedford Tx Member No.: 8,156 Region Association: Southwest Region  |
The heat box around the exhaust pipes rattles and is loose at the front end on the pipes. Any reason not to take it to the muffler shop and have it welded back down tight? (IMG:style_emoticons/default/welder.gif)
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| Prospectfarms |
Oct 30 2011, 09:00 PM
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#2
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Member Group: Members Posts: 495 Joined: 7-March 11 From: Louisville, KY Member No.: 12,801 Region Association: Upper MidWest |
Mild steel HE's appear bonded by friction to the exhaust manifold pipe. A rattle there would seem to indicate failure. When mine rusted through, I peeled them off the pipe and now have "headers" but no heat. I found some SS HE this Summer. These do seem to be fully welded.
The hot air produced by the HE is routed to the cabin through distribution boxes via a pipe and plate assembly that is held together with screws. Perhaps that's what's rattling? Looking under the car, I can see that welding the hot air routing assembly would be a bad idea for a number of reasons. I also would hesitate to weld the seam between the HE and the exhaust pipe -- mainly because it would be difficult to produce a reliable weld there. I assume (hope) the welds of the SS versions started out as clean metal and were designed to accommodate repeated expansion, heat and shock. |
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| SirAndy |
Oct 30 2011, 09:08 PM
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#3
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Resident German Group: Admin Posts: 41,688 Joined: 21-January 03 From: Oakland, Kalifornia Member No.: 179 Region Association: Northern California |
QUOTE(Prospectfarms @ Oct 30 2011, 08:00 PM)  Mild steel HE's appear bonded by friction to the exhaust manifold pipe. (IMG:style_emoticons/default/agree.gif) They aren't welded. CO kills and even the tiniest crack from a weld could eventually split wide open. Bad idea ... (IMG:style_emoticons/default/popcorn[1].gif) |
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Posts in this topic
bandjoey Heat Exchangers Oct 29 2011, 02:23 PM
GeorgeRud I seem to recall that they weren't welded when... Oct 29 2011, 03:00 PM 914Bryan I have considered the same thing...Or maybe just s... Oct 29 2011, 08:29 PM partwerks On the factory heat exchangers I had before, what ... Oct 30 2011, 09:18 PM
Prospectfarms
On the factory heat exchangers I had before, what... Oct 30 2011, 09:39 PM partwerks I basically filled the gap around the pipe. If you... Oct 30 2011, 09:49 PM bandjoey That sounds good. yep it's the rattle of the ... Oct 30 2011, 09:56 PM partwerks Plus it will keep more of the heat in where it bel... Oct 30 2011, 10:11 PM 914Mike I had good luck with an old rusty pair by going ol... Oct 30 2011, 10:58 PM |
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