A/C and Fuel don't mix! - BMW Forum - BimmerWerkz.com
3-Series (E21, E30) Chat relating to the BMW 3-Series from 1975-1983 and 1984-1991 line. Specific models: BMW 315, BMW 316, BMW 318, BMW 318i, BMW 320/4, BMW 320i, BMW 320/6, BMW 323i, BMW 320i. E30 Family models include: BMW 325e, BMW 325i, BMW 325is, BMW 325ix.

 
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#1 (permalink) Old 11-30-2006, 12:56 AM
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A/C and Fuel don't mix!

Why the hell does my A/C suction hose have a metal part on it with two lines running from the other side of the car with fuel in them? What do the lines and the metal part do?

fasten Fahrt!!!
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#2 (permalink) Old 11-30-2006, 06:18 AM
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hmm, theres no Fuel in the AC lines, just Freon and some mineral oil

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#3 (permalink) Old 11-30-2006, 05:16 PM
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I know, it's kinda weird. I'll post pics tonight.

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#4 (permalink) Old 12-02-2006, 10:29 PM
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Here's a pic of the thing. The big connection in the back is A/C and the small ones are fuel.
One goes to the fuel press reg and I can't see where the other one goes. Sorry the pic is so big.



A/C and Fuel don't mix!-sspx0022.jpg

fasten Fahrt!!!
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#5 (permalink) Old 12-02-2006, 10:50 PM
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I know what that is, it's fuel heat exchanger, used mostly on mercedes benz, it cools the fuel to prevent vapor lock. Why the person put it on the car is odd, BMW's are not prone to vapor lock, unless you live on the equator or the person thought he could get a few hp with it but any gain would be lost from the load of the A/C. Odd.....

Last edited by Starmavin; 12-02-2006 at 10:59 PM.
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#6 (permalink) Old 12-02-2006, 11:16 PM
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Really weird. I just had that hose rebuilt, so I guess I'll leave it. Won't hurt, will it?

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#7 (permalink) Old 12-03-2006, 12:22 AM
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No, it won't hurt it. Since there are no moving parts inside, there is nothing that can really go bad.
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