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Old 11-02-2001, 05:23 PM
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Join Date: Jun 2000
Location: Plano, TX
Posts: 2,476
What color is an evaporator?

Yeah, I know it sounds like a stupid question. But here's the rub. I recently spent a bunch of time fixing the a/c system in my '87 124. Said time involved numerous practice sessions installing and removing the expansion valve. In the process I noticed that my evaporator appears to be made of copper. Both tube ends jutting out the firewall are brownish, with perhaps a bit of greenish discoloration here and there.

I thought the 124 came with a rotten aluminum evaporator. If so, wouldn't it be silverish in color? Does the brown color imply my car has already undergone an evaporator-ectomy?

Inquiring minds want to know.

- Jim
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Old 11-02-2001, 05:28 PM
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Join Date: May 2000
Location: Soperton, Ga. USA
Posts: 11,232
My guess would be

that the tubes you are seeing are copper. The evap should be silver in color.
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Old 11-02-2001, 08:17 PM
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Join Date: Mar 1999
Location: Suwanee, GA, USA
Posts: 4,712
This is one of the reasons for the number of failures. Copper tubes on an aluminum core.
Donnie Drummonds
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Old 11-03-2001, 09:42 AM
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Join Date: Jun 2000
Location: Plano, TX
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Oh great, so galvanic corrosion is a problem too. Just peachy.

- Jim
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