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Thread: engine

  1. #1
    Junior Member SHOW GUEST
    Join Date
    Mar 2010
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    2

    engine

    will a 5.4 replace a 4.6 in a 1997 f150

  2. #2
    Junior Member SHOW GUEST
    Join Date
    Mar 2010
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    2

    engine

    i want to replace a 4.6 in a1997 f150 with a 1994 4.6 out of a 1994 mark v111

  3. #3
    Senior Member EXPERT BUILDER gearhead1011's Avatar
    Join Date
    Jan 2004
    Location
    Shepherdsville, KY
    Posts
    313
    The transmission and motor mount pattern is the same on the 5.4 & 4.6. The trouble you will have is everything else. The 5.4 is taller and wider than the 4.6 so consider that as far as making it fit and hooking everything up including the exhaust. The mark VIII engine is a DOHC and the pick up engine is a SOHC and although you can replace one with the other it will not be a bolt in swap. You will have to change the engine harness and swap the PCM. Then you have to deal with different electronically controlled transmissions and they are controlled by the PCM so swapping the PCM for the correct engine may not be the correct one for the transmission you want to use.

  4. #4
    Senior Member RACING JUNKIE
    Join Date
    May 2006
    Posts
    2,044
    Hey Chuck, check your PM's
    ***IN GOD WE TRUST***

  5. #5
    Senior Member EXPERT BUILDER gearhead1011's Avatar
    Join Date
    Jan 2004
    Location
    Shepherdsville, KY
    Posts
    313
    Quote Originally Posted by cepx111
    Hey Chuck, check your PM's
    Just sent you one back.


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