Fuel Cooler (BMW OEM)

[NC325iC]

Has anyone seen one of these before?

my buddy bought an 87 325is a while back and recently saw under the hood of mine and noted that my fuel lines were weird. He told me his go to a heat exchanger on one of the A/C lines, i called BS. Yesterday he showed it to me, and sure enough the feed line comes up to the firewall, meets a hardline and travels to the A/C line on the other side where it passes through a heat exchanger (tube over tube it looks like). Ive never even heard of this before but it is definitely OEM, anyone else seen one?

[Dominic49]

yes my 87is has one aswell

[nando]

you think that's wierd, early 325ix's have power steering coolers.

[delatlanta1281]

Mine has it as well.

[Lof8]

Mine had the fuel cooling system. I deleted it when doing my engine swap.

[gearheadE30]

huh, that's kinda cool. Any idea why they had coolers? Fwiw my 318is doesn't have it.

[whysimon]

my 86' e had the same until I converted to 24v

[delatlanta1281]

huh, that's kinda cool. Any idea why they had coolers? Fwiw my 318is doesn't have it.

BC the 87's were so hot!

[BrewCity11]

There was a 6-9 month period (86-87) where ze germans thought they needed to cool the fuel returning back to the tank.

They corrected themselves, obviously, so no problem removing it. I've removed 3 sets.

Just bypass the whole setup. Remove hard lines that go along blower cover and the rubber lines on the a/c line. No need to plug them up. Then run a new rubber line from the hard line on the frame rail to the fuel rail.

[NC325iC]

strange system, especially since it would only work with the A/C on.

[Lof8]

strange system, especially since it would only work with the A/C on.

seriously. it was a total WTF! when I realized what the system was and how it was supposed to work.

[325ix]

you think that's wierd, early 325ix's have power steering coolers.

wierd. Is it useful?

[kenika65]

any pics!

[CorvallisBMW]

I've never heard of this, kinda cool but also kinda pointless I'm sure.

[einstein57]

Its intended to prevent vapor lock. They figured it probably won't be hot enough to be needed unless you yourself are sweating like a pig and would need to turn on the a/c. Probably only useful in places like nevada