Top End rebuild
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500, 472, 425, 368 Discussion, Top End rebuild in Cadillac Engine Technical Discussion; Ok,,,, i just got my 74 eldo 500 cid home saturday. I pulled all the plugs (big boys) last night, ...
  1. #1
    74eldog is offline Cadillac Owners Fanatic
    Automobile(s): 74 Eldorado
    Join Date
    May 2005
    Location
    Columbus, Ohio
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    Top End rebuild

    Ok,,,, i just got my 74 eldo 500 cid home saturday.

    I pulled all the plugs (big boys) last night, and sprayed the cylinders, a couple of plugs looked kinda of oily (good sign). I decided to only do a top end rebuild on it, if the motor isn't locked up... If the motor is locked up then i will be rebuilding from Top to Bottom....
    I'll find out in a couple of days...

    It was running and in great shape when parked 10yrs ago.

    Right now I'm thinking: Valve job, starter, alternator, plugs,wires, Carburetor, cap, fuel pump, cleaning and re-sealing gas tank and radiator,

    I'm keeping it stock, so i guess i have to keep the same intake in order to run the A/C.


    Am I on the right track????

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  3. #2
    terrible one's Avatar
    terrible one is offline Banned
    Automobile(s): 1976 Eldorado project
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    El Dorado, Arkansas
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    Re: Top End rebuild

    You will find yourself replacing valve guides, maybe new pushrods as well. Valve springs are probably pretty tired as well.

    I would do more than just a new cap on the distributer. How about cap, rotor, coil, etc. MSD, Pertronix, and Proform all make kits. Just make sure you keep the stock springs and weights. They are much higher quality than the taiwanese crap that comes with kits.

    Are you going to rebuild the carb, get a new one, or what? I would suggest sticking with the Quadrajet. You could run a pre-egr intake if you wanted a bit better flow, while still retaining the a/c.

  4. #3
    terrible one's Avatar
    terrible one is offline Banned
    Automobile(s): 1976 Eldorado project
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    Re: Top End rebuild

    http://cgi.ebay.com/ebaymotors/Roche...QQcmdZViewItem

    Also check that out. This guy knows what he is doing (using the bronze throttle shaft bushings, sealing well plugs, etc. However if you see, it also says that he could rebuild your core for you if you wanted to go a cheaper route, keep it numbers matching, etc.

  5. #4
    dyin-tryin is offline Cadillac Owners Member
    Join Date
    Nov 2005
    Posts
    3

    Re: Top End rebuild

    Hey there,
    The only way for the valve job to help is to have hardened seats pressed in. Without them it will suck the valves right into the runners.

    best of luck,

    dyin-tryin

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