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catd11rpusher

fuel lines on chevy titan

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I'm doing the fuel lines on my titan, and I want to know, does one line connect to the other tank?, and does the other go to a splitter and the go to the fuel inlet to the fuel pump? Can anybody help? :wacko:

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This is not specific to the Astro but pretty much anything out there from the beginning of time until electronics started taking over. There is a "crossover" line typically. It normally hangs pretty low between the tanks but is protected by a C channel or similar. There were many ways of doing this when the truck was spec'd out. Typically the lines were a "T" type affair. Shut offs were options. One common shut off or one or on each tank. On Detroit engines, fuel would go to a fuel strainer (not the fuel filters) mounted somewhere on the frame then to the gear driven pump, then the fuel filters and then the injectors. Detroits have unitized injectors meaning each injector has the high pressure pump contained within the injector body so there are no high pressure fuel lines like Cat and Cummins. Steel piping (other than under the valve cover) on Detroits is very rare as pressure was always less 100 psi. No need for it. Cat and Cummins must be steel after the injection pump as you are dealing with potentially thousands of psi. Don't forget there is always a return fuel line from the fuel filters on Detroits back to the tank or tanks..again options.... . Cat and Cummins return systems typically returned straight from the injection pump back to the tank(s)...but variations exist. Fuel preheaters, if equipped should be before the fuel strainer.

But to your question specifically WHERE they routed these lines? I can tell you that basically every one SEEMS different. Frame length, tanks, frame mounted accessories, engines, transmissions, etc all played parts. Rule of thumb....route it away from road debris and heat and in such a way it does not rub or limit access to another component. Lastly make a feeble attempt to make the connections and components in the system halfway accessible...though that was always seemed to come last on the priority list.

Good luck

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