auto engine replacement for blown 455?

Discussion in 'DIY Marinizing' started by erinj, Feb 26, 2006.

  1. erinj
    Joined: Feb 2006
    Posts: 3
    Likes: 0, Points: 0, Legacy Rep: 10
    Location: antioch, ca

    erinj New Member

    I've got a boat with a blown 455 olds. I'm wondering what my least expensive option would be for replacing the engine. Would an automotive engine bolt up? Anyone have any ideas or know how I can find out which engines will be compatible with the existing adapter and berkeley jet drive? Thanks
     
  2. Thunderhead19
    Joined: Sep 2003
    Posts: 506
    Likes: 3, Points: 0, Legacy Rep: 21
    Location: British Columbia, Canada

    Thunderhead19 Senior Member

    The block (despite what others may say) is identical to a stock auto block. Your job would be to strip down the boat motor including the cam and install the old components on a new short block. Just out of curiosity, by "blown" you mean what? What happened? threw a rod? seized? destroyed the #1 main?
     
  3. erinj
    Joined: Feb 2006
    Posts: 3
    Likes: 0, Points: 0, Legacy Rep: 10
    Location: antioch, ca

    erinj New Member

    Thunderhead,

    What automotive engine could I use as a replacement? Does it depend on the existing specific adapter and jet drive?


    It threw two rods and engine filled with water.

    Thanks, erinj
     
  4. Thunderhead19
    Joined: Sep 2003
    Posts: 506
    Likes: 3, Points: 0, Legacy Rep: 21
    Location: British Columbia, Canada

    Thunderhead19 Senior Member

    I think you may be able to go with any GM big block V-8, but I'm not 100% sure. Couldn't you find a 455 replacement? Most reduction gears and or drive units will fit a selection of different motors. I think you may find that one adaptor fits all GM big blocks, one adaptor fits all Ford small blocks etc...Can't say 100% for sure though.
     
  5. FAST FRED
    Joined: Oct 2002
    Posts: 4,519
    Likes: 109, Points: 63, Legacy Rep: 1009
    Location: Conn in summers , Ortona FL in winter , with big d

    FAST FRED Senior Member

    BOP, Buick Olds Pontiac , will usually swop and the belhousings will fit.Chevvy is different

    Just get another Olds 455 and swop as recomended.

    When GM built motorhomes in the 60 & 70'd the Olds 455 was THEIR choice for the most robust engine in the lineup .

    If GM thought it was the best they had , and you have all the boat conversion goodies , a rebuilt Olds seems like a no brainer.

    If you want a cheap huge engine the 500cid Caddys from the 70 are as big as you can get and are cheap .

    FAST FRED
     

  6. erinj
    Joined: Feb 2006
    Posts: 3
    Likes: 0, Points: 0, Legacy Rep: 10
    Location: antioch, ca

    erinj New Member

    Thanks, Fred

    Fred, I didn't check in for awhile and just saw your reply. Thank you for the iformation. I appreciate that you and the others have offered to share you knowledge on the subject. I'm sure I'll be posting more questions about this subject. Thanks again, erinj
     
Loading...
Forum posts represent the experience, opinion, and view of individual users. Boat Design Net does not necessarily endorse nor share the view of each individual post.
When making potentially dangerous or financial decisions, always employ and consult appropriate professionals. Your circumstances or experience may be different.