I have a fuel cooling system

[shogun]

Working on my project 750 Highline and ripping out a lot from the engine room for replacement of many wear parts such as fuel lines, plugs, dizzy caps, injector nozzle o-rings replacement, cleaning,
intake polishing :D
and other things, I find that the fuel return line goes INTO the aircon tube for cooling and then out again to be re-fed to the tank. Have not seen that on my other 750's. It might be against vapor lock? Someone knows that?
http://www.bimmerboard.com/members/take/original/CIMG4250.jpg

And that was my special tool to get the injectors out :p
No, actually a joke when we talked about what is the best method ;)
http://www.bimmerboard.com/members/take/original/CIMG4248.jpg

[Rory525]

Interesting - maybe it was only on cars destined for hot climates e.g the middle east ?

[Bill R.]

mercedes v8's have it too.... its to help cool the fuel since a constantly recirculating fuel system like bmw and mercedes used then would actually heat up the fuel in the tank by bringing it up past the hot manifolds and then sending it back to the tank, this cooling from the ac suction line helps to counteract that.




Working on my project 750 Highline and ripping out a lot from the engine room for replacement of many wear parts such as fuel lines, plugs, dizzy caps, injector nozzle o-rings replacement, cleaning,
intake polishing :D
and other things, I find that the fuel return line goes INTO the aircon tube for cooling and then out again to be re-fed to the tank. Have not seen that on my other 750's. It might be against vapor lock? Someone knows that?
http://www.bimmerboard.com/members/take/original/CIMG4250.jpg

And that was my special tool to get the injectors out :p
No, actually a joke when we talked about what is the best method ;)
http://www.bimmerboard.com/members/take/original/CIMG4248.jpg