Info Needed For '79 Coupe DeVille!

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500, 472, 425, 368 Discussion, Info Needed For '79 Coupe DeVille! in Cadillac Engine Discussion; Just bought my first Cadillac! It's a '79 Coupe DeVille with a 425 (7.0L) big block! I want to gather ...
  1. #1
    79_Devil_Sedan is offline Cadillac Owners Member
    Join Date
    Aug 2005

    Info Needed For '79 Coupe DeVille!

    Just bought my first Cadillac!

    It's a '79 Coupe DeVille with a 425 (7.0L) big block!

    I want to gather as much information on this car as I possibly can!

    Pros/Cons/Downfalls/Possible Problems and remedies for such problems.

    My car has 121,xxx kms on it and is in pretty good shape other then some rust blisters and a bad trunk lid.

    It runs and drives very nicely (As all Cadillacs should).

    The only thing I don't like about this car is the Rottenchester 4 burper that's on it.

    Now I'm a hardcore Mopar guy but I have always had a soft spot for the Cadillac.

    Could I stick a Thermo-Quad on there?

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  3. #2
    The Ape Man's Avatar
    The Ape Man is offline Cadillac Owners Connoisseur
    Automobile(s): '80 Fleetwood Coupe, 1994 and 1995 Mercedes 140 Coupe
    Join Date
    Feb 2005
    Southern NJ

    Re: Info Needed For '79 Coupe DeVille!


  4. #3
    caddydaddy's Avatar
    caddydaddy is offline Cadillac Owners Connoisseur
    Automobile(s): 2005 Escalade 6.0L 2WD, 2007 Jeep Grand Cherokee Limited CRD
    Join Date
    Jan 2003
    Gales Ferry, CT

    Re: Info Needed For '79 Coupe DeVille!

    There's nothing wrong with a Q-jet. Get it rebuilt or get a rebuilt one and it will run fine. You will never get as good gas mileage with any other carb.
    As for the rest of the '79, they're great car! Not too much to worry about, except basic maintenance. If it has much over 100k miles, the timing chain could be changed.

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