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Fuel Heater?

Discussion in '1982-Present GM Diesel' started by longbedder, Jan 3, 2007.

  1. longbedder

    longbedder 1/2 ton status Premium Member

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    On the steel fuel line that comes up the front of the engine from the lift pump, there is a vertical section about 6-8" long that has a larger diameter than the rest of the tube. This enlarged section has an electrical wire and connector (single conductor) coming out of it. Is this a fuel heating element?

    I thought the fuel heaters were under the intake manifold, but this one is not.

    The engine is an '83 6.2L.
     
  2. BKinzey

    BKinzey 1/2 ton status

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    Could be, but I don't think that's stock. Stock heater is built in where the fuel filter goes.
     
  3. Rob 85K5

    Rob 85K5 1/2 ton status GMOTM Winner

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    Did the 83 still have the canister filter, and not the rectangle?
     
  4. longbedder

    longbedder 1/2 ton status Premium Member

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    Here's a picture. As you can see, the electrical connector is a late-model one, not one from the '83 era.

    I guess I could always plug it into 12 volts and see if it gets warm...

    The only other possible thing I could guess is some sort of water sensor, but I really think it must be a heater.

    By the way, the truck I've got is an '83, and has the canister filter attached to the firewall. The engine I'm oging to put into it (the one in the pic) has the rectangular filter attached to the rear of the intake manifold.

    IMG_1242.jpg
     
  5. BKinzey

    BKinzey 1/2 ton status

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    Well, plug it in and see what happens:D:D
     
  6. imiceman44

    imiceman44 1 ton status

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    Is this the engine you bought from me?
     
  7. longbedder

    longbedder 1/2 ton status Premium Member

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    Yup, sure is, Iceman...
     
  8. smalltruckbigcid

    smalltruckbigcid 1/2 ton status

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    You know that looks like one of those fuel magnetizing things. Some people claim they work some don't. Notice it only has one wire coming out of it. No electric fuel heater would be wired that cheesy, they usually pull about 15-20 amps. Or it could be a water detector for the fuel....I've never had much luck with those.
    George
     
  9. colbystephens

    colbystephens 1 ton status GMOTM Winner

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    i have a '83 6.2 that came stock. it has the dual fuel filters (one on the fire wall, one on the back of the intake.) to my knowledge, these dual filters were only on the '82 and '83 model engines. i do not have the larger fuel line like you... my guess is after market.
     

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