Interested/questions about a motor swap on 98 Eldorado
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Cadillac Seville / Cadillac Eldorado Forum Discussion, Interested/questions about a motor swap on 98 Eldorado in Past Cadillac Vehicle Discussion; Does anyone know which motors are compatible with this car?? It is a 98. Can I put a 3.8 in ...
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    dez305 is offline Cadillac Owners Member
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    Interested/questions about a motor swap on 98 Eldorado

    Does anyone know which motors are compatible with this car?? It is a 98. Can I put a 3.8 in here? If not can I use a DTS motor? Can i only use one out of a eldo/seville?? Answers please?

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    MoistCabbage's Avatar
    MoistCabbage is offline Cadillac Owners 10000+ Posts
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    There's a "sticky" thread in the Northstar forum on engine interchangeability.

    You're stuck with the Northstar. A direct swap will come from a '96-'99 IIRC.

    Base Eldo? You'll need a VIN Y engine (base Eldo, SLS, Base Deville, Deville d'Elegance).

    Why are you swapping in the first place?

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    dez305 is offline Cadillac Owners Member
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    Re: Interested/questions about a motor swap on 98 Eldorado

    Because I heard the Northstar is prone to oil leaks. Im not 100% on doing a swap but just trying to see is it possible or could i use a motor from like a 00-01 seville or eldorado. Yes is a Base eldo

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    Re: Interested/questions about a motor swap on 98 Eldorado



    No. You can't use a 2000+ engine.

    If you have a leak, why not just reseal it when you pull it and reinstall it?

    Check the sticky mentioned above.

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    dez305 is offline Cadillac Owners Member
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    Re: Interested/questions about a motor swap on 98 Eldorado

    Quote Originally Posted by Ranger View Post


    No. You can't use a 2000+ engine.

    If you have a leak, why not just reseal it when you pull it and reinstall it?

    Check the sticky mentioned above.
    Yes im looking at it now. I bought the car and it runs hot after awhile so i was tryin to see which would be more cost efficent. Well can i at least use a ETC motor on a base? Or a 99 base in a 98

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    Re: Interested/questions about a motor swap on 98 Eldorado

    No, you cannot swap a VIN Y (LD8) for a VIN 9 (L37) or vice versa.

    Remember the '99 has the worst HG failure record. If you replace the motor with an untouched one, you may have the same problem down the road. If you replace the motor it would be advisable to pull the heads, drill and tap the bolt holes and insert or stud it. Not doing so is kind of like playing Russian Roulette. In the words of Dirty Harry, "Do ya feel Lucky"?

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    Models with comparable (VIN Y) engines are listed in
    Post #2.

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