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73-87 Chevy _ GMC Trucks => Fuel Systems and Drivability => Topic started by: nuknuk on June 05, 2017, 09:31:11 pm

Title: Need fuel line diagram for dual tanks
Post by: nuknuk on June 05, 2017, 09:31:11 pm

1987 R10 Silverado 350 V8 with dual tanks.

I am looking for a fuel line diagram that shows from the sending units in the tanks to the selector valve for a dual tank set up on an 1987 R10.

Thank you.

Title: Re: Need fuel line diagram for dual tanks
Post by: nuknuk on June 06, 2017, 12:23:35 pm

This diagram of the fuel lines seems not to exist.  So if I can I will make one, once I figure it out.

Title: Re: Need fuel line diagram for dual tanks
Post by: bd on June 06, 2017, 12:45:17 pm

I understand that a fuel line diagram would be convenient, but what exactly do you need to know?  Are you converting to dual tanks and want to mimic the OE configuration?

Title: Re: Need fuel line diagram for dual tanks
Post by: ehjorten on June 06, 2017, 01:12:58 pm

3/8" Feed line, 5/16" return line, and 1/4" vapor recovery line from LH tank run across the crossmember at the to the RH rail.  This is done via hardlines.  They go into the switching valve that is mounted inside the RH rail.  The RH fuel tank just feeds directly into the switching valve with rubber fuel lines.  The 1/4" vapor line goes into a tee under the switching valve and passes off to a hardline in the RH rail.  One set of 3/8" and 5/16" lines go down the RH rail to the engine.

Title: Re: Need fuel line diagram for dual tanks
Post by: Irish_Alley on June 07, 2017, 06:30:43 pm

(http://forum.73-87chevytrucks.com/smforum/index.php?action=dlattach;topic=35133.0;attach=35886;image)