4.1 to 4.9.... RWD?

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HT4100 4.1, 4.5, 4.9 Discussion, 4.1 to 4.9.... RWD? in Cadillac Engine Discussion; I am sure this is a dumb question that I already know the answer to, but I have to ask ...
  1. #1
    akimball442's Avatar
    akimball442 is offline Cadillac Owners Fanatic
    Automobile(s): '81 CDV, '84 Olds 98 Coupe, '81 MB 300D,'73 450SL, '88 300SE
    Join Date
    Sep 2005
    upstate ny

    4.1 to 4.9.... RWD?

    I am sure this is a dumb question that I already know the answer to, but I have to ask it anyway with a small ray of hope.

    They began putting the HT4100 in the big RWD cars in 82 or 83.... then put it in the FWD cars. Is that the same engine?

    What I'm wondering is if you can put a 4.9 in place of a RWD 4.1. I realize the 4.9 only came in FWDs.

    I'm looking at an 83 coupe deville, and I'd like to get rid of the 4100 ASAP because it stinks... and the 4.9 I had in my 93 Sixty Special was a killer engine. I'm sure it would lug around the RWD coupe with no trouble, if it would in fact fit....


    Aaron K

    Just curious...


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  3. #2
    illumina's Avatar
    illumina is offline Cadillac Owners Connoisseur
    Automobile(s): '98 Buick Regal LS - '91 Caddy Seville - '87 Caddy Seville!
    Join Date
    Feb 2004
    The Empire...

    Re: 4.1 to 4.9.... RWD?

    No, they're not the same engine. However, someone out there makes an adaptor kit for the FWD 4.x engine to fit RWD, I just don't know who though.

    I'm sure someone else will know and chime in.

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