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73-87 Chevy _ GMC Trucks => Fuel Systems and Drivability => Topic started by: DrDaryl on October 12, 2012, 11:11:18 pm

Title: Fuel return line diameter
Post by: DrDaryl on October 12, 2012, 11:11:18 pm

My truck is an 86 and the fuel sending unit has three fuel lines--is the fuel return line the 1/4"
line and the vent is the 5/16" or do I have it backwards?  Thanks

Title: Re: Fuel return line diameter
Post by: bd on October 12, 2012, 11:28:20 pm

Supply is 3/8"
Return is 1/4"
Vent is 5/16"

Title: Re: Fuel return line diameter
Post by: DrDaryl on October 13, 2012, 12:41:36 pm

thanks

Title: Re: Fuel return line diameter
Post by: DnStClr on October 13, 2012, 06:23:57 pm

And you measure steel tubing on the outside diameter.