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Fuel Line To Heat Source Clearance?

Discussion in 'Early CJ5 and CJ6 Tech' started by Karl Childers, Dec 3, 2017.

  1. Karl Childers

    Karl Childers Member

    One of my Winter projects will be to convert my CJ5 back to gas from its current propane set up. When I do that the gas tank will go back under the seat and the old fuel line will go in its normal location. The potential problem is the previous owner had a brand new dual exhaust system installed and the one exhaust pipe will come with in 2 inches of the fuel line and three inches of the floor that will have the gas tank right above it. Will insulating the fuel line in foil and putting an aluminum heat shield between be enough or should I get a muffler shop to re-route the pipe?
     
  2. 45es

    45es Active Member 2024 Sponsor 2023 Sponsor 2022 Sponsor

    I would think a heat shield will more than addiquate. That's exactly how jeep protected the under floor brake master cylinder.
     
  3. PeteL

    PeteL If it wasn't for physics, and law enforcement... 2024 Sponsor 2023 Sponsor 2022 Sponsor

    A flat heatshield with air on both side ought to be plenty adequate.
     
  4. NCRenII

    NCRenII yellow fever

    This is precisely how my stock 71 fuel line is protected from the exhaust/headpipe junction on the drivers side. Fuel pump is right there too.
     
  5. Karl Childers

    Karl Childers Member

    That's the answers I was hoping to hear I'd rather go the shield route than have the exhaust cut up.
     
  6. tarry99

    tarry99 Member

    New Mexico?..............If you Idle that allot in the heat , I would move the fuel line away from the heat source.......that floor can get real hot when warm outside.
     
  7. Karl Childers

    Karl Childers Member

    The southern part of the state gets hot as an oven in the summer I live in the northern part at an elevation of 7,500 ft so I see a handful of days in the nineties and most in the eighties in the warm months. Also I'm in a small town that gets a little bit of tourist gridlock in the summer but I know the back ways around it. I'm better off than if I lived in Albuquerque or Las Cruces when it comes to heat and traffic. That should make a difference shouldn't it?
     
  8. GeoffreyL

    GeoffreyL Well-Known Member

    Which motor are you running?
     
  9. tarry99

    tarry99 Member

    Just saying Jeeps are like tin cans..........if it's cold out that body is an Ice cube...........if warm , just the opposite............Exhaust routing and likewise fuel line routing is important...... Idling and moving along at slow speeds just does not get enough air moving under the vehicle to keep it from heating up .............if you have a choice route your fuel as far away from the exhaust as possible.
     
    Karl Childers likes this.
  10. NCRenII

    NCRenII yellow fever

    Not suggesting you ignore Larry's post, but I think you'll be fine. New fuel line material (even the old) is designed to handle high heat. If your jeep has a return fuel line any gas bubbles will be purged off to the tank reducing vapor lock issues. Also airflow from the clutch less fan supply cooling air.
     
  11. RATTYFLATTY

    RATTYFLATTY I think you need a little more throttle

    As noted, a return line will be a good upgrade.
     
  12. Karl Childers

    Karl Childers Member

    283 sbc with dual exhaust.