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500, 472, 425, 368 Discussion, 2 questions in Cadillac Engine Technical Discussion; I pulled my plugs and sprayed my cylinders on my 500 cid motor, i didn't mark the wires, so i ...
  1. #1
    74eldog is offline Cadillac Owners Fanatic
    Automobile(s): 74 Eldorado
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    May 2005
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    2 questions

    I pulled my plugs and sprayed my cylinders on my 500 cid motor, i didn't mark the wires, so i would know where they go...does anyone know the firing order on the cap? i can still see the numbers on the manifold...


    Also what size bolt do i need for the crankshaft?

    i forgot they didn't come from the factory with crank bolts and i need to see if the motor will turn

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  3. #2
    74eldog is offline Cadillac Owners Fanatic
    Automobile(s): 74 Eldorado
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    Thread Starter

    Re: 2 questions

    hey guys I did a search and found the answers to the;

    crank bolt size...

    I just need to know where #1 is on the cap.... does anyone have a pic...

    Thanks....

  4. #3
    BluEyes's Avatar
    BluEyes is offline Cadillac Owners Enthusiast
    Automobile(s): 1970 Sedan deVille hardtop
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    Re: 2 questions

    Sorry, but the answer is "It Depends"
    Honestly. Some books might show a picture with #1 in a certain location, but because the only thing that matters is the order they are fired in, the distributor can be installed with #1 pointing anywhere as long as all the other cylinders fire in the right order and the engine is timed right.
    What you need to do is use that new crank nut and turn the engine over to TDC, compression stroke, on #1 (passengers front cylinder). Put the #1 plug wire on the terminal that the rotor arm is pointing to then, and put the rest of the plug wires on in a clockwise direction, following the order on the intake.

  5. #4
    74eldog is offline Cadillac Owners Fanatic
    Automobile(s): 74 Eldorado
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    Thread Starter

    Re: 2 questions

    Quote Originally Posted by BluEyes
    Sorry, but the answer is "It Depends"
    Honestly. Some books might show a picture with #1 in a certain location, but because the only thing that matters is the order they are fired in, the distributor can be installed with #1 pointing anywhere as long as all the other cylinders fire in the right order and the engine is timed right.
    What you need to do is use that new crank nut and turn the engine over to TDC, compression stroke, on #1 (passengers front cylinder). Put the #1 plug wire on the terminal that the rotor arm is pointing to then, and put the rest of the plug wires on in a clockwise direction, following the order on the intake.
    Dah, i just rebuilt the motor on my chevy... i should've known that...

    Thanks and you're correct.

  6. #5
    74eldog is offline Cadillac Owners Fanatic
    Automobile(s): 74 Eldorado
    Join Date
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    Thread Starter

    Re: 2 questions

    Quote Originally Posted by 74eldog
    Dah, i just rebuilt the motor on my chevy... i should've known that...

    Thanks and you're correct.
    Well i wasn't able to turn the motor by hand.... i think that the pistons are just very rusted, I'm planning on pulling the motor over the next couple of weeks...

    I'm gonna have the heads rebuilt, and freshen up the bottom end....

    On the upside, when i put the battery in and turned the key, EVERYTHING, still works....

    Transmission has already been rebuilt and still has the tag on it

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