500 cid year ID?
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500, 472, 425, 368 Discussion, 500 cid year ID? in Cadillac Engine Technical Discussion; I'm considering buying a Revcon motorhome, with a Cadillac 500 cid engine and Art Carr modified Turbo FWD transmission. Would ...
  1. #1
    Mark in Modesto is offline Cadillac Owners Member
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    Jul 2004
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    500 cid year ID?

    I'm considering buying a Revcon motorhome, with a Cadillac 500 cid engine and Art Carr modified Turbo FWD transmission. Would someone be willing to tell me how to determine which year (and compression ratio) this engine is, please?

    Thanks,

    Mark in Modesto

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  3. #2
    lux hauler is offline Cadillac Owners Connoisseur
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    Re: 500 cid year ID?

    There's only really one way to tell.......pull one of the heads. A casting number under the valve cover could tell you whether or not they are small or large combustion chambers but there were different piston designs used. The size of the piston "dish" changed the compression.

  4. #3
    Mark in Modesto is offline Cadillac Owners Member
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    Thread Starter

    Re: 500 cid year ID?

    Thanks, Lux, it sure doesn't sound as easy as a serial number search! Having no idea what year model the donor car was, I guess I'll just have to hope it was a good one. Could one assume the earlier, higher hp/torque/comp. ratio engines would NOT run well on regular, while the later, subdued models might?


    Mark

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