2001 ESC into 1997 ETC
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Cadillac Seville / Cadillac Eldorado Forum Discussion, 2001 ESC into 1997 ETC in Past Cadillac Vehicle Discussion; Hey all, My 2001 Eldorado ESC got totaled so I bought a '97 Eldorado ETC. Before my '01 was totaled ...
  1. #1
    Coldreach is offline Cadillac Owners Member
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    2001 ESC into 1997 ETC

    Hey all,
    My 2001 Eldorado ESC got totaled so I bought a '97 Eldorado ETC. Before my '01 was totaled I went through the engine and did the head gasket studs and a few other things. Since the '97 I just bought has 140K miles and needs the head gasket repair I was wondering if I can just swap my '01 engine into my '97. Any insight would be greatly appreciated.

    Thanks,
    Davis

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  3. #2
    Submariner409's Avatar
    Submariner409 is offline If it won't run, slap in a big stereo
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    Re: 2001 ESC into 1997 ETC

    No. Totally different engines, mechanically, horsepower, and engine-controls wise. Even all the wiring harnesses and sensors are different.

    Changes for 98-99 and again for 2000 and later.

  4. #3
    Coldreach is offline Cadillac Owners Member
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    Re: 2001 ESC into 1997 ETC

    Someone had mentioned a while back that if I pull out everything... engine, trans, wiring harness, cradle... pretty much the entire front end of the powertrain I can make it work. Would that be at all possible or is it still not possible?

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    Submariner409's Avatar
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    Re: 2001 ESC into 1997 ETC

    No.

    Please go to Engines, Northstar and study the engine interchangeability sticky thread.

    EDIT: Given enough time and money, anything is possible - but for the cost/heartache to do a strange retrofit you could have 2 or 3 mint condition Collector's Edition 2002 ETCs.

  6. #5
    Coldreach is offline Cadillac Owners Member
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    Re: 2001 ESC into 1997 ETC

    Ah, thank you.
    While studying the guide I did in fact find that it is possible. The OP of the post mentions it can be done a few replies down from his original guide. Thanks again for directing me that way.

    -Davis

  7. #6
    MoistCabbage's Avatar
    MoistCabbage is offline Cadillac Owners 10000+ Posts
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    Yes, it's possible. But why go through all of that??

  8. #7
    N*Caddy's Avatar
    N*Caddy is offline Cadillac Owners Master
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    Re: 2001 ESC into 1997 ETC

    To begin with you will downgrade the 300HP ETC to a 275HP ESC.
    The swap involves changing engine/transmission/PCM/Harness.
    The 2000+ engines have different compression rate 10:1 instead of 10.3:1, different valve drive (heads), different ignition, intake, emission system and sensors. Also the transmission is slightly different (enough so it needs replacing).
    Mounting points are the same, will fit with no problem, you will need solid knowledge and the cost of it is not reasonable.

  9. #8
    Submariner409's Avatar
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    Re: 2001 ESC into 1997 ETC

    Vasi, his mind is made up - don't confuse him with facts.

    Coldreach, When you embark on this swap, please keep this thread updated. The outcome will be good information for all FWD Seville/Deville/Eldorado owners.

  10. #9
    N*Caddy's Avatar
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    Re: 2001 ESC into 1997 ETC

    To be honest I revealed to Jake that once my engine is done (hopefully I get another 200K miles of it), I would much like to find a '00+ ETC drivetrain - low mileage. You know the typical Arizona car driven by a blue hair little ol’lady to and from the church once a week and it was rear-ended (surprisingly how many of these are available ).
    But so far my engine is fine, not one single issue or concern...
    Call me blond or superficial but I just don't like the ignition wires.

    Well the 200K plan is if no Kia/Hyundai totals my car. Last Saturday I was on the HWY doing 60MPH on the far left lane when one of those horrible little Asian cars I call them Kia Shed (it literally looks worst than my shed) just pulled 10-15 yard in front on my lane doing no more than 20 MPH. Thank God for the shoulder I managed to stop parallel with the $*#t box on the shoulder. I could have literally gone trough that thing and split it in half and have 2 kids on my conscience for the rest of my life. In their home country (China/Korea …whatever) they may not need to use mirrors and turning signal but here they should, is their life.
    In India (that was on TV, not sure if real or not) but they said the law does not requires you to check your mirrors, you are only responsible of what is in front of you. They showed some cars driving with the side mirrors folded in. That explains a lot…

  11. #10
    Submariner409's Avatar
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    Re: 2001 ESC into 1997 ETC

    Yes - BUT - You have the extensive mechanical, electrical and electronic knowledge - and the required dedication - to essentially re-manufacture the front end of your STS. Is it not true that, for all practical purposes, you have redesigned/rebuilt almost your entire vehicle wiring system ?

  12. #11
    Coldreach is offline Cadillac Owners Member
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    Re: 2001 ESC into 1997 ETC

    Quote Originally Posted by N*Caddy View Post
    To begin with you will downgrade the 300HP ETC to a 275HP ESC.
    The swap involves changing engine/transmission/PCM/Harness.
    The 2000+ engines have different compression rate 10:1 instead of 10.3:1, different valve drive (heads), different ignition, intake, emission system and sensors. Also the transmission is slightly different (enough so it needs replacing).
    Mounting points are the same, will fit with no problem, you will need solid knowledge and the cost of it is not reasonable.
    I am aware I will be losing 25HP (if after 140K miles the car even has 300) I have the whole front end of my car. Trans, axles, wiring, cradle, etc. The reason I will "downgrade" if you can even call it that, is that this engine will need extensive work, which in turn means extensive pockets. I already had work done on mine before it was totaled so I don't see any reason to spend more money than the car is worth when I have a perfectly good engine and transmission that I can put into this car. I will keep everyone updated on the build.

  13. #12
    MoistCabbage's Avatar
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    N*, why not get an F55 parts car for the drivetrain? Maybe one weekend after the engine swap, you'll get bored and try an F55 conversion...

  14. #13
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    Re: 2001 ESC into 1997 ETC

    Quote Originally Posted by Coldreach View Post
    I am aware I will be losing 25HP (if after 140K miles the car even has 300) I have the whole front end of my car. Trans, axles, wiring, cradle, etc. The reason I will "downgrade" if you can even call it that, is that this engine will need extensive work, which in turn means extensive pockets. I already had work done on mine before it was totaled so I don't see any reason to spend more money than the car is worth when I have a perfectly good engine and transmission that I can put into this car. I will keep everyone updated on the build.
    ===================================

    you might not understand that what you are TRYING to do
    is NOT a simple engine/trans swap -

    the BEST solution would be to get rid of the 97 -
    and get a 2000+ with a blown engine - or bad trans -

    good luck -

  15. #14
    Coldreach is offline Cadillac Owners Member
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    Re: 2001 ESC into 1997 ETC

    Before I start here are all the trouble codes currently listed in the car:
    PCM P0603
    IPC B1552
    ACM U1153
    SDM B1122
    SDM B1161
    TCS C1255
    PZM B1552
    PZM B1558
    PZM U1128
    IRC B1740
    IRC B1771
    IRC U1064

    Hopefully when the new engine is in there won't be any new codes, I will let you know as it progesses

  16. #15
    Submariner409's Avatar
    Submariner409 is offline If it won't run, slap in a big stereo
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    Re: 2001 ESC into 1997 ETC

    DTCs mean nothing unless accompanied by the definitions ............. see how long it takes you to memorize this list .....

    The first set of DTC XX codes do not apply to your car.

    http://www.obd-codes.com/trouble_codes/gm/obd_codes.htm

    P = Powertrain
    B = Body
    C = Chassis
    U = Voltage and data

    I hate to burst your bubble, but after (if) the swap your car will be a code breeder. The engine/sensor/chassis/data systems will probably be so incompatible as to render the car undriveable. (Do you need to pass emissions inspections ?)

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