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F134 fuel pump question

Discussion in 'Early CJ5 and CJ6 Tech' started by Robheib, Aug 24, 2006.

  1. Aug 24, 2006
    Robheib

    Robheib Fire Jeep

    Stanwood, WA (50...
    Joined:
    Jul 14, 2006
    Messages:
    53
    Hello all, I have a question about the fuel pump on my 1953 M38A1. Is there any advantages to going electric vs. original? I think mine needs a rebuild. I'm thinking about replacing the mechanical (original) fuel pump with an electric one. I assume this is an easy task. I'm also planning to upgrade my vacuum wipers with electric so they'll work consistently under all conditions. Is there any reason to keep the old fuel pump attached? What else does the pump provide vacuum for?

    Thanks for your input!

    Rob
     
    Robheib, Aug 24, 2006
    #1
  2. Aug 24, 2006
    w3srl

    w3srl All-around swell dude Staff Member

    Port Orange, FL
    Joined:
    Nov 6, 2002
    Messages:
    4,275
    The only "advantage" I can think of with an electircal pump on a F-head is that if you happen to roll over, the pump will continue to pump and spill fuel out of the carb vent and all over the hot engine.

    IMHO, unless you have a real need to go electric, I'd stay with the mechanical pump. They are solid & reliable, rarely giving any trouble unless they are really old and dried out. The F-head really doesn't need either a lot of fuel pressure (2-3 Lbs IIRC) or a lot of volume so the stock pump is just fine for most rigs.

    If you want to go with electrical wipers, then you can use the less expensive mechanical pump from a CJ. This pump doesn't have the vacuum pump up on top, and costs a LOT less.
     
    w3srl, Aug 24, 2006
    #2
  3. Aug 24, 2006
    JMNardo

    JMNardo New Member

    Joined:
    Jul 6, 2005
    Messages:
    25
    I replaced my old fuel pump which included the vacume pump a while back. Since I already had electric wipers I switched to the pump without the vacume side. As I recall when I inspected it, there is a very thin seal along the shaft. If the seal fails, engine oil can get into the vacume side of the pump which would not be good. I could be mistaken on that, its been a while since I looked at it. But if true, its not a bad reason to avoid the vacume pump if you don't need it.
     
    JMNardo, Aug 24, 2006
    #3
  4. Aug 26, 2006
    weedy

    weedy Member

    Conroe, Tx
    Joined:
    Apr 19, 2005
    Messages:
    156
    On extreme inclines an electric will not have interupted flow. Unless you are climbing EXtreme hills there is no advantaqe to the electric.
     
    weedy, Aug 26, 2006
    #4
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