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Thread: Spark plug leads question

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    Corporal
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    Default Spark plug leads question

    Stupid question time

    previous owner of my 61 m37 has installed civilian ht leads which have a tendency to pop off the distributor

    My question is
    how do I work out which lead from the distributor goes to which cylinder?

    theres no numbers apparent on the distributor

    thanks

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    4 Star General NDT's Avatar
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    Several ways:
    1. Replace the wires one at a time.
    2. Refer to the Technical Manual
    3. Find TDC of #1 cylinder in compression stroke, see which tower the rotor is pointing to, then place the remaining wires per the firing order. I think the distributor turns CCW.

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    Thanks
    can’t find it in the tech manual

    by replacing them one at a time what am I listening of out for to know which ones right?
    Thanks

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    4 Star General M35A2-AZ's Avatar
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    TM TM 9-2320-212-20 Parg. 2-15 may help
    Trucks: 43 Willy's MB, 52 M37, 71 M35A2 w/w, 84 m936, 85 M923A1, 85 M929, 84 M925
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    4 Star General dmetalmiki's Avatar
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    Your 'looking' out for actually. Anyway a logical way to work out the firing order is to remember that Number one cylinder is usually at the front of the engine.
    And that the rotation of the Distributor is usually Anti clockwise.
    The firing order of a six cylinder engine is usually 1-5-3-6-4-2.
    Thus, when you start out to change the leads trace Number one from the ist plug to the distributor cap and tape it as Number one.
    Next lead going from the second plug going to the distributor head anti clockwise tape as Number two.
    And so on.
    Further reading for you.
    https://www.militarytrader.com/milit...ystems-part-ii' ></span><span class='st_email' st_title='Historic Military Vehicle Ignition Systems Part II' st_url='https://www.militarytrader.com/military-vehicles/historic-military-vehicle-ignition-systems-part-ii' ></span><span class='st_stumbleupon' st_title='Historic Military Vehicle Ignition Systems Part II' st_url='https://www.militarytrader.com/military-vehicles/historic-military-vehicle-ignition-systems-part-ii' ></span><span class='st_plusone' st_title='Historic Military Vehicle Ignition Systems Part II' st_url='https://www.militarytrader.com/military-vehicles/historic-military-vehicle-ignition-systems-part-ii' ></span><span class='st_sharethis' st_title='Historic Military Vehicle Ignition Systems Part II' st_url='https://www.militarytrader.com/military-vehicles/historic-military-vehicle-ignition-systems-part-ii' ></span><span class='st_facebook' st_title='Historic Military Vehicle Ignition Systems Part II' st_url='https://www.militarytrader.com/military-vehicles/historic-military-vehicle-ignition-systems-part-ii' ></span><span class='st_fblike' st_title='Historic Military Vehicle Ignition Systems Part II' st_url='https://www.militarytrader.com/military-vehicles/historic-military-vehicle-ignition-systems-part-ii' ></span>
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