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Stock Plastic Fuel Line as a Return Line?


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Can I use the stock plastic fuel line as a return line from my M42?

My `67 1600 just has the one line. I added the hard line from a `76 for the feed; I just want to make sure that the plastic fuel line can take the return pressure. I suspect that it can, because there won't be any resistance at the end where it dumps back into the tank.

The fuel pump will be the stock E30 318is 3 bar (43 psi) pump.

1967 1600-2 - M42 - 1521145          Follow my project at www.TX02.blogspot.com          E30 DD Project Blog


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That's what Tii's did.... Use the metal line for pressure and the plastic for return. That said, your early car only has a 6mm plastic line. I would swap it for a later 8mm one so you can be sure the volume is handled.

Tom Jones

BMW wrench for 30 years, BMWCCA since 1984 at age 9
66 BMW16oo stored, 67 1600-2 lifelong project, 2 more 67-8 1600s, 86 528e 5sp 586k, 91 318i
Mom&Dad's, 65 1800TiSA, 70 2800, 72 2002Tii 2760007 orig owners, 15 Z4 N20

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