1984 Coupe DeVille Engine Swap!
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RWD 19xx-1984 DeVille and Fleetwood,
1985-1996 Fleetwood and Brougham Forum Discussion, 1984 Coupe DeVille Engine Swap! in Past Cadillac Vehicle Discussion; It's finally happening. I started my engine swap today. My Olds 350 is just about done, so I figured it ...
  1. #1
    greencadillacmatt's Avatar
    greencadillacmatt is offline Cadillac Owners Connoisseur
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    Talking 1984 Coupe DeVille Engine Swap!

    It's finally happening. I started my engine swap today. My Olds 350 is just about done, so I figured it was about time I got cracking on the car itself.

    I think I am going to pull the trans along with the engine, as I have heard it is much easier than trying to hook everything up in the car.

    I have everything disconnected from the engine except for the mounts and exhaust. And I climbed under the car and found that there is just one electrical connector to the trans, and one crossmember bolt. Well, that and the shift linkage. Should be easy.

    I started with draining and pulling the radiator. The shroud and brackets came out super easy.

    The electrical connectors and and wires are all unplugged/off, and the vacuum lines are off.

    And my little brother and I took the hood off, just because it is so much nicer to NOT have it eating my head.

    Without any further ado, the pictures of the progress of a total engine-swapping newb.


    One of the last pictures of the Horror-Time 4100 hooked up...


    Where'd the hood go?


    Oh, there it is


    The MASSIVE hole where the radiator and fan shroud was.


    My AC might have been slightly improperly vented.


    And last but not least for tonight, it seems as though my car has decided to do wheelies.

    I'll post more tomorrow. Thanks guys!

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  3. #2
    MudAnt's Avatar
    MudAnt is offline Cadillac Owners Enthusiast
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    Re: 1984 Coupe DeVille Engine Swap!

    Looks like a fun project, nice to see another '83-'85 have the HT4100 replaced instead of the whole car being scrapped. Are you going to post some pictures of the 350?



    Wat

  4. #3
    greencadillacmatt's Avatar
    greencadillacmatt is offline Cadillac Owners Connoisseur
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    Re: 1984 Coupe DeVille Engine Swap!

    Yeah, I will post some pictures of what is going into the car tomorrow. And the Milk Jugs is our recyclables container for plastics. Kind of odd, I know.

  5. #4
    MudAnt's Avatar
    MudAnt is offline Cadillac Owners Enthusiast
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    Re: 1984 Coupe DeVille Engine Swap!

    Oh, that makes sense. I thought you were using the garbage can as a giant milk jug

  6. #5
    77CDV's Avatar
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    Re: 1984 Coupe DeVille Engine Swap!

    Well wishes for your project. What transmission will you be going with for the replacement engine?

  7. #6
    csbuckn is offline Cadillac Owners Master
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    Re: 1984 Coupe DeVille Engine Swap!

    Looking good. Cant wait to see the motor. That is a nice coupe too.

  8. #7
    The-Dullahan is offline Cadillac Owners Master
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    Re: 1984 Coupe DeVille Engine Swap!

    I hope to swap my engine...when I have $4,000 lying around for a new engine, money for a transmission and cash for the swap itself...

    No photos of the 350?

  9. #8
    greencadillacmatt's Avatar
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    Re: 1984 Coupe DeVille Engine Swap!

    77CDV-I'm going with the 200-4r that's in the car. It's only got 50,000 or so on it, and it has new fluid and a new filter. They are rated to 300 HP or so, and I should be making low to mid 200s for power. High 200s to low 300s for torque.

    CS and The-Dullahan-I'll post up pics of the engine tomorrow. Has everything on it but the accessories. (Those will go on this weekend )

  10. #9
    csbuckn is offline Cadillac Owners Master
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    Re: 1984 Coupe DeVille Engine Swap!

    Take LOTS of pics, this will be a very popular swap. I could see you getting PMs about this swap 10 years from now from people with random questions.

  11. #10
    greencadillacmatt's Avatar
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    Re: 1984 Coupe DeVille Engine Swap!

    ^I think I can do that. (checks memory card)

  12. #11
    bicentennialcadillac is offline Cadillac Owners Enthusiast
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    Re: 1984 Coupe DeVille Engine Swap!

    This is great.

  13. #12
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    Re: 1984 Coupe DeVille Engine Swap!

    This just might be FAQ worthy by the time it is done... make sure you document all the steps.

  14. #13
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    Re: 1984 Coupe DeVille Engine Swap!

    Hmm, I like the idea of this getting FAQ'd.

    And now it's time for a big long post! (I tried to get as many pictures as possible.)

    I started off the day by putting the carb and exhaust manifolds onto my engine. I think it's starting to look pretty good.




    My carb and distributor. If you look really hard you can see all of the plugs that I threaded into the manifold to block off all of the emissions stuff.


    After the engine work I decided to unhook the linkages on the trans. The speedo cable came off nice and easy (forgot to get a picture of that). Then I took the shifter linkage off. All that holds it in is a little pin, so be careful where you put it. I put mine back in the end of the linkage once it was off.


    Once the trans connections were unhooked, I thought it was about time to disconnect the old exhaust. Instead of trying to unbolt the manifolds from the engine, or unbolting the exhaust from the manifolds, I decided to grab this:


    I figured that since the old exhaust will be of no use to me anyways, it's not really going to matter if I chop it up a bit. Might I add that the sawzall I used was a freaking beast, and it made short work of the pipes.


    This is what I ended up cutting out. It's a little T-pipe that hooks the two pipes from the engine together and then routes them through the cat.


    Ah, the cluttered workbench. My parents are cool and let me take over the garage for this undertaking.


    Finally, I have some new parts to install tomorrow!

  15. #14
    sven914 is offline Cadillac Owners Connoisseur
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    Re: 1984 Coupe DeVille Engine Swap!

    I like the colors, but Rocket Motors are supposed to be green and gold...

  16. #15
    77CDV's Avatar
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    Re: 1984 Coupe DeVille Engine Swap!

    His car wants to go to Cal, OK?!?

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