4100? worth rebuilding
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HT4100 4.1, 4.5, 4.9 Discussion, 4100? worth rebuilding in Cadillac Engine Technical Discussion; i know a few people on here are going to dog on me for asking this question, but i was ...
  1. #1
    96BIG_BODY is offline Cadillac Owners Fanatic
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    4100? worth rebuilding

    i know a few people on here are going to dog on me for asking this question, but i was wondering if anyones ever fixed up a 4100, is there any other parts you can put on to beef it up?

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  3. #2
    My_favorite_Brougham's Avatar
    My_favorite_Brougham is offline Cadillac Owners Connoisseur
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    Re: 4100? worth rebuilding

    No, no one's ever really beefed up a 4100. An engine swap is more cost effective and practical when it comes to such a dog of an engine. I've only heard of two exceptions. One being when folks would get crate motors from the dealer (and from what I've heard they have 'em stacked to the ceiling!). But that doesn't solve it's issues nor give more power. Second, I have heard of companies like Jasper (not them, but someone else) who take the 4100 and rebuild it with the issues resolved (gasket failures, etc.), but that doesn't give it anymore power.

    In my opinion, a 250CID engine is wayyyyy too little for a big d-body car. Even the 305/307CID motors are too small. The bare minimum should have been a 350 for any decent power. Hence why the 77-80 cars did so well and the 350 Bros from 90-92. A 5L car does okay, but there's no real power or performance, just enough to get by. And a 4.1L is just unsafe. Honestly, I could never even pass a car on the freeway, and that was in my 307 Bro.

    Greg

  4. #3
    Cadi_Ken is offline Cadillac Owners Member
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    Re: 4100? worth rebuilding

    I have a 4100 in my 84 coupe DeVille. is a 350 compatible wit the tranny in the 84 or would that need to be swapped out as well

  5. #4
    96BIG_BODY is offline Cadillac Owners Fanatic
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    Thread Starter

    Re: 4100? worth rebuilding

    good to know

  6. #5
    rootercycles is offline Cadillac Owners Member
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    Re: 4100? worth rebuilding

    could you get a small block (350) to fit transversely?

  7. #6
    LJS1993 is offline Cadillac Owners Member
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    Re: 4100? worth rebuilding

    Quote Originally Posted by My_favorite_Brougham View Post
    No, no one's ever really beefed up a 4100. An engine swap is more cost effective and practical when it comes to such a dog of an engine. I've only heard of two exceptions. One being when folks would get crate motors from the dealer (and from what I've heard they have 'em stacked to the ceiling!). But that doesn't solve it's issues nor give more power. Second, I have heard of companies like Jasper (not them, but someone else) who take the 4100 and rebuild it with the issues resolved (gasket failures, etc.), but that doesn't give it anymore power.

    In my opinion, a 250CID engine is wayyyyy too little for a big d-body car. Even the 305/307CID motors are too small. The bare minimum should have been a 350 for any decent power. Hence why the 77-80 cars did so well and the 350 Bros from 90-92. A 5L car does okay, but there's no real power or performance, just enough to get by. And a 4.1L is just unsafe. Honestly, I could never even pass a car on the freeway, and that was in my 307 Bro.

    Greg
    How much would the 4.1 cost from the dealer? Are they still available? My mother is insisting that I restore her 83 Eldorado which overheated and well, you know the rest of the story.

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