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216 engine on a stock 47 fleetline

Discussion in 'The Hokey Ass Message Board' started by PLANETGETLOW, Jan 24, 2014.

  1. PLANETGETLOW
    Joined: Jan 24, 2014
    Posts: 3

    PLANETGETLOW
    Member
    from Arizona

    Sorry for the stupid question but what is the outside filler neck located on the passenger side of the engine block for? Sometimes it will blow coolant out of it. Should. I fill this up or not?
     
  2. 1st off read the rules , please post an INTRO.

    2 pictures help , looking at my 216 I don't see a "filler neck" for coolant unless your speaking of the shut off from the water-pump that would go to the heater core , if so turn the valve all the way off or remove it and install a pipe plug.
     
  3. mr.chevrolet
    Joined: Jul 19, 2006
    Posts: 6,434

    mr.chevrolet
    Member

    thats probably the road draft tube. i've seen some that have a cap for oil fill.
     
  4. PLANETGETLOW
    Joined: Jan 24, 2014
    Posts: 3

    PLANETGETLOW
    Member
    from Arizona

    Sorry ill post a bio when I get on a PC instead of this iPad, and yea I googled road draft tube, that's it. What's its purpose
     
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  5. its purpose is to ventilate the crankcase;) , it shouldn't blow coolant:eek:, good luck
     
  6. PLANETGETLOW
    Joined: Jan 24, 2014
    Posts: 3

    PLANETGETLOW
    Member
    from Arizona

    It doesn't blow coolant out of it, I guess I stated that wrong. and maybe it's coming from somewhere else but i THINK I have seen some come from somewhere in that area before.
     
  7. jetnow1
    Joined: Jan 30, 2008
    Posts: 1,383

    jetnow1
    ALLIANCE MEMBER
    from CT
    1. A-D Truckers

    The old road draft tubes predate the pcv valve, they allowed the crankcase to vent but
    were a major pollution source and as the old oils were non detergent the oil that came from them could be very nasty looking, easy to see why someone not familiar would think
    it was coolant.
     
  8. hoop98
    Joined: Jan 23, 2013
    Posts: 1,363

    hoop98
    Member
    from Texas

    Here is a pic of the road draft tube. Diluted oil and crankcase condensation could drip out of it. With a lot of blow-by it can be a mess.

    [​IMG]
     

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