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Putting a 4.0 OHV engine into 2005 Sport Trac Adrenalin...

Discussion in '2001-2005 Explorer Sport Trac' started by waltchan, June 17, 2011.

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    1. waltchan

      waltchan New Member

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      Really interested in buying a used 2005 Sport Trac Adrenalin 4X4, but I prefer the older 4.0L OHV pushrod than the current 4.0L SOHC. Is it possible to change based on the size of the engine compartment, will it fit, and has anyone done this before with a Sport Trac made in any year, between 2001 and 2005?

      Please do not reply saying why I want a slower engine. The older 4.0L OHV pushrod has a better track record for dependability than the current 4.0L SOHC Ford is using right now, according to many sources. Thanks for any replies made.
       
      Last edited: June 17, 2011
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    3. Eddie9195

      Eddie9195 New Member

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      I think it would bolt in. The motor mounts would have to be swapped.

      However, the computer are completely different and it would have to be rewired to run correctly.
       
    4. waltchan

      waltchan New Member

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      What about the 5-speed auto transmission used in the 4.0 SOHC? Does it fit with the 4.0 OHV? This combo was done before by Ford with the 1997 Aerostar.
       
    5. Glen4X4

      Glen4X4 Explorer Addict

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      I'll start off by saying yes it will fit. The transmission should bolt up except for one hole as I believe the ST still used the 5R55E in that year. I'm thinking you should be able to use a ECM from a 99-00 Explorer that had the OHV from factory as it had PATS and returnless fuel rail. If not you should be able to make the SOHC ECM work since its still a 4.0L engine but will require some custom wiring.
       
    6. NICE59FORDF100

      NICE59FORDF100 Staff Member Moderator Elite Explorer

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      May i Ask why you want to swap motors? Is the 2005 SOHC bad? Los of miles? IMO, that would be a downgrade in performance based solely off HP/TQ ratings

      As far as if it will work? Sure, it will work. The tranny will bolt up, but as was mentioned, one tranny bolt will be moved to another location (The two most upper mounting holes, both at 12:00 Position)

      The SOHC PCM is capable of running the OHV, HOWEVER, some rewiring will be in order...Off the top of my head, the crank and cam sensors are different in design, but may be the same data type. Would have to research that.

      The motor mounts IIRC are the same so it should set on in (if you use a second gen OHV...first gen OHV would have to have the motor mount BRACKETS swapped, but not the mounts on the crossmember)

      of course you would have to swap over some of the accesories and lines (power steering comes to mind first) as well as the air intake hose, and little stuff like that. I would shoot for a late model OHV so the engine harness will be able to match up the engine bay harness, with some repinning in order. I would avoid swapping PCM's unless you do one of the following:

      1) PATS is picky...if you swap out the PCM, you HAVE to swap over all PATS related hardware, which included the PCM, PATS module behind the dash, the key transeiver, and the keys themselves, which also means all the door lock clyinders.

      2) Have PATS turned off by flashing. This means sending the PCM off to be flashed.

      If you are dead set on using the OHV, retain the PCM and rewire to make work.
       
    7. Glen4X4

      Glen4X4 Explorer Addict

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      ^^This guy knows his wiring and swaps...
       
    8. NICE59FORDF100

      NICE59FORDF100 Staff Member Moderator Elite Explorer

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      AWWW, glen youre making me blush :)
       
    9. JohnnyO

      JohnnyO Moderator Emeritus

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      Not worth the time an effort to install an engine with 57 less horsepower IMO.
       
    10. Glen4X4

      Glen4X4 Explorer Addict

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      From the original post of this thread:
      So he's basically saying he don't care that its under powered to start with.
       
    11. ncranchero

      ncranchero Co-moderator Staff Member Moderator Elite Explorer

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      I can't help with the swap you're interested in and I know of nobody that has done it. One (or more) of the members here has swapped in the long block from a late mode Mustang and is very happy with it.
       
    12. graessle

      graessle New Member

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      Hey i have an 04 Adrenaline and i'm going to swap motors with the same motor thats in it jst a brand new one, i shouldn't really need anything else right? I feel like it should be plug and play since it's the same motor.
       
    13. Glen4X4

      Glen4X4 Explorer Addict

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      It "should" be a direct swap but if its brand new you may have to swap your sensors over.
       
    14. waltchan

      waltchan New Member

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      Glad to hear it's possible. Where's a good, professional place to get it done, assuming I have the 4.0 OHV engine in hand? I live in the Los Angeles, CA area.

      Am I better off buying the complete 4.0 OHV engine on eBay (there's several), or buy a complete vehicle and do the swap, and sell the vehicle again?
       
    15. graessle

      graessle New Member

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      Motors swapped and running toot sweet. thanks guys
       
    16. plance1

      plance1 Active Member

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      If I was going to swap an engine, Id swap one of the new engines from the f150, I think I read the 6 has two turbo chargers? any thoughts on this?
       
    17. Joe Dirt

      Joe Dirt Explorer Addict

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      oh yeah- it'll bolt right in. No clearance issues at all.
       
    18. plance1

      plance1 Active Member

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      Not sure why you would assume I think it would be a bolt in operation without clearance issues but whatever dude
       
    19. OffTrac

      OffTrac Elite Explorer

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      Where are you planning on getting that engine and how much money do you have? The latter is usually the only thing that ever says "no, it can't be done."
       
    20. Glen4X4

      Glen4X4 Explorer Addict

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      Good to hear, how are ya likin the underpowered OHV?


      Lol you're not good at picking up sarcasm are ya?
       
    21. kaczman

      kaczman Active Member

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      I have the solution - trade me your 2005 Sport Trac Adrenalin and you can have my 02 ST with the engine you requested.
       
    22. Pjibs

      Pjibs Active Member

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      I wanna see pics!
       
    23. feedthezombie

      feedthezombie Member

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      I'm interested in moving to the OHV in place of the 4.0 SOHC in my 98 XLT, looking through the internet i get a massive mix of "yes it can, no it cant, its a pain, you have to swap the entire body harness with the engine harness etc.."

      I would like to be able to retain the SOHC ECU/PCM so that the 5R55E can function as well as the interior fixings. Is it possible to run the OHV engine using the SOHC ECU, by just re-pinning the engine harness to match up with the SOHC ECU?

      Any help is greatly appreciated i have a 2001 model OHV with low miles i can get for $500 so really wanting to jump on this soon providing its possible.
       

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