Fuel Line Routing Help

Hello all,

I’ve installed a new electric fuel pum on side frame rail near tank. Now I’m trying to figure out best routing. Seems going back down from carb towards mechanical pump location will make me fight the Exhaust headers and Steering shaft.

Will laying on top of intake and going back down towards firewall/tranny to get to frame be a problem with great etc?
Thoughts? Help? Ideas?

 

Suggestion:
remove that glass fuel filter before it cracks and burns your rig to the ground. it happens!

maybe safer to run steel line. rubber melts. kaboom

 

yeah I’ve been thinking about both of those suggestions. So the hose would melt there? Thought it would be better there than near the headers.

regarding metal lines...I assume only metal on the motor then change to hose to where it would connect to body/frame so it can accommodate engine movement/vibration?

 

'66-'70 commandos used a plastic/nylon type hose........same as big rig air brake hose. it went from the tank, up the floor tunnel, to the back of the motor and then switched over to steel. I used it a lot since it's very flexible BUT keep it away from exhaust pipes. Safest way, steel lines and metal fuel filters. Stock lines never touch the intake manifold thier mounted in brackets off of the manifolds, etc.

 

My line is steel. From the carb it makes a U turn forward, crosses over the distributor and then drops down between the driver side header and the engine block. At about the same height as the steering shaft (power steering) it bends 90 degrees running parallel with the ground until it hits the driver side frame rail, running inside the “c” channel of the frame rail to the electric pump and then up to the fuel tank.

 

I've been using those glass filters for decades. I don't think there is much likelihood of it breaking - certainly less likely than a hose fatiguing or a plastic filter cracking, etc. But it would be good to mount it so it is not bouncing on a metal surface. And I'd definitely add a hose clamp.

But metal lines are certainly much safer. I've had a lot of failures with rubber lines in recent years, between the crap fuel and crap rubber... definitely scary.

 

Thanks. I wouldn’t even know how to mount it or metal fuel lines. I guess I need to research that now.

 

thanks. Can you post pictures of at least your lines on your motor?

Also you lines are metal all the way? No rubber transition for flex or vibration between motor and frame?

 

1/4" brake tube and fittings usually work well for gas lines.

 

It is metal all the way, including where it drops down the side of the motor and makes the transition to the frame. Given the length of metal line (somewhere around 24” dropping down and then another 24” before it gets into the frame C channel) it seems to have plenty of flex to handle any vibration.

Here’s a couple pics. One from top of motor and another showing the bend after it drops down the side of the motor. Second picture seems to be showing up sideways for me. Left side is actually the top of the picture.

 

You do use high grade rubber fuel line when splicing in fuel filters, hooking the steel lines at the tank or pump.
As mentioned, Using 1/4 or 3/8 brake line works very well.
Use a old fashion metal coat hanger or welding rod and use it to make the fuel line pattern you need.
I don't have pics of fuel line routing but the guys in here can post up stuff.
I strongly suggest to never use a in-line fuel filter that requires rubber hose to splice into the steel fuel line when it's on top of the intake manifold. I've dealt with numerous engine compartment fires caused by them.

 

Some apps use the little pieces of hose on the fuel filter above the engine from the factory.



These can be a fire hazard if you don't replace them regularly. Plus the cheap bulk hos the MacParts stores sell falls apart in a couple of years, regardless of conditions. I'd suggest buying the best quality hose you can find for this application, at a minimum Gates branded, or maybe rated for EFI.

More Information for GATES 27304
More Information for GATES 3500565

 

Some photos of the factory location with metal filter body. Note heat shield for fuel line.The O.E.M. supply line is 5/16" and the return is 1/4" fyi. Line is metal from fuel pump filter location to carb inlet .Also filter inside carb inlet that work very well.I have changed many clogged sintered brass filters

 

YES! That small piece of hose can cause tremendous damage. Kept me employed repairing toasted engine compartments.

 

MIKE

Would you happen to have a pic showing the lines going across the intake? That should give Jonbbrew a darn good pattern to follow. Great pics!

 

X2 please!

 

Different jeep but same engine bay layout.

 

MIKE
perfect pics

Jonbbrew

The 2 lines that are going across the intake are coming up from the back, and go all the way across the intake and down to the fuel pump. Then from the pump 1 line goes to the carb. nuts huh? One line is a return line to the tank. the smaller one. This is the stock set up.