1968 472 HEI SWAP, Big time Problems!
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  • 2 Post By Angela Desmond
500, 472, 425, 368 Discussion, 1968 472 HEI SWAP, Big time Problems! in Cadillac Engine Technical Discussion; The motor is a 1968 Cadillac 472.I've set #1 to TDC(compression stroke),dropped the distributor in and set my cap up ...
  1. #1
    EvilTrucks is offline Cadillac Owners Member
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    Talking 1968 472 HEI SWAP, Big time Problems!

    The motor is a 1968 Cadillac 472.I've set #1 to TDC(compression stroke),dropped the distributor in and set my cap up accordingly.Still,nothing but backfiring through the carb&not starting.My CHILTON book showed #1 at about 1 o'clock;this was for 68's only.Should the vacuum adv.be pointing in any certain direction?

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  3. #2
    Imprl59 is offline Cadillac Owners Fanatic
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    Re: 1968 472 HEI SWAP, Big time Problems!

    Are you sure you have timed it with #1 at TDC on the compression stroke? Sounds like you are 180 degrees off.


    Steve B.

  4. #3
    Angela Desmond is offline Cadillac Owners Fanatic
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    Re: 1968 472 HEI SWAP, Big time Problems!

    Well, it's obviously out of time if it's backfiring. Of course, you remembered that Caddy #1 is on the passenger side, unlike other motors...When you put the dist. in, make sure the star wheel on the dist. is exactly on the firing point. A little one way or the other and you'll be pretty far off. Sometimes, removing a distributor can move the oil pump position slightly and you'll think you're dropping the new dist. in exactly as the old one came out, but you'll be a little off, that's why you should check the star wheel. Face the vacuum adv. in pretty much the same direction as the dist. you took out.Hope that helps some...

  5. #4
    EvilTrucks is offline Cadillac Owners Member
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    Thumbs up Re: 1968 472 HEI SWAP, Big time Problems!

    I,m gonna do just that,thanks for the input.Hopefully my next post'll say running 68 cad motor.....

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