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magic930's Avatar
 
Join Date: Apr 2003
Location: Carnation, WA
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Clean Heat Exchangers!

Got snowed in today in Seattle so I took the opportunity to clean my heat exchangers! These are aluminum exchangers from a 930; A before vs after cleaning photo is shown below.



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Old 01-06-2004, 04:04 PM
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What did you use? I always assumed you could never get the shine back on the pipes.
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Old 01-06-2004, 04:24 PM
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Yes, how did you do it...some sort of (wire) brush? On mine I can see the shiny below the surface layer, but the surface layer looks like some kind of coating and I was concerned about removing it.
Old 01-06-2004, 07:12 PM
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Nice job.

I recently wire-brushed mine down to (mostly) bare metal and shot them with some high temp aluminum colored paint. Finish isn't a shiny as that above but it will pass when the car is on the lift
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Old 01-06-2004, 07:28 PM
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First I cleaned the whole thing with "Gunk" to remove as much of the oil and baked on oil as possible, scrubbing hard with a tooth brush and a small brass wire brush and letting it soak overnight. I had a lot of oil leaks which had crusted up on the surface (especailly the top side not shown in the photo) .
The lower exchanger in the photo is after cleaning with the Gunk.
Using a "medium coarse" wheel type wire brush on an electric drill followed by a "fine" cup type wire brush took all the stains and corrosion away and polished the surface. I will probably do another pass with a polishing compound on the bottom side to make it shine some more.
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Old 01-06-2004, 07:46 PM
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looks nice. a snow day. I was going to install my new CV's, but too chilly in the garage or at least that's my excuse. Nice work. Did you get much Snow???
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Old 01-06-2004, 09:45 PM
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Re: the first post....

I don't think this is correct. The factory heat exchangers are a low-grade ( from a *cosmetic* standpoint), rust-resistant stainless steel...not aluminum. I polished mine up the same way ( on my NA 3.2 Carrera) using a wire wheel....


---Wil Ferch
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Old 01-07-2004, 09:20 AM
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I just did this, bead plasted it clean and then used "Rub N Buff" on it. Rub N Buff is a trick I learned a while ago on engine components. Works great, easy to apply, and with last a long time on exhaust parts.

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Old 01-07-2004, 10:07 AM
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