M42club.com - Home of the BMW E30/E36 318i/iS

DISCUSSION => Engine + Driveline => Topic started by: rob_e30 on March 05, 2007, 06:02:05 PM

Title: Basic question... which barb is fuel supply vs. return?
Post by: rob_e30 on March 05, 2007, 06:02:05 PM

I'm putting an M42 into my E30 and replacing an M20.  I didn't take the M42 out so I need to know which barb on the fuel rail is supply and which is return?  It's not in the Bentley's and I can't tell from Real OEM.  There are two barbs one silver and one black that attach to a bracket on the intake manifold, one above the other.

I know which is the supply line from the pump/tank I just need to know where to connect which.

Thanks.

Title: Basic question... which barb is fuel supply vs. return?
Post by: rob_e30 on March 06, 2007, 05:01:36 PM

Nobody here can answer this?

Title: Basic question... which barb is fuel supply vs. return?
Post by: individualist on March 06, 2007, 05:28:53 PM

Standing on the driver's side looking at the motor. The return is the connection on the left side of the fuel rail.

(http://www.realoem.com/bmw/showparts.do?model=AF93&mospid=47305&btnr=13_0308&hg=13&fg=15)

Title: Basic question... which barb is fuel supply vs. return?
Post by: individualist on March 06, 2007, 05:34:42 PM

Won't let me post a pic so here's the link.http://www.realoem.com/bmw/showparts.do?model=AF93&mospid=47305&btnr=13_0308&hg=13&fg=15 (http://www.realoem.com/bmw/showparts.do?model=AF93&mospid=47305&btnr=13_0308&hg=13&fg=15)

Title: Basic question... which barb is fuel supply vs. return?
Post by: rob_e30 on March 06, 2007, 05:43:40 PM

Great.  I see that they are labeled as inlet and return.  I didn't notice that before, thanks!