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4.0L SOHC balance shaft. Why/what if?

Discussion in 'Under the Hood' started by ncranchero, November 30, 2010.

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    1. ncranchero

      ncranchero Co-moderator Staff Member Moderator Elite Explorer

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      1. Why does the 4.0 SOHC have a balance shaft in the 4x4 and not in the 4x2 ?

      2. What are the consequences of replacing a balance shaft engine with a non-balance shaft engine?

      I have a '01 4.0L in a Trac and a guy wants it to put in an '03 Explorer 4x4. I told him there was a difference but he still wants it.

      Help me out with some explanation please.
       
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    3. 2000StreetRod

      2000StreetRod Staff Member Moderator Elite Explorer

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      Interchangable

      Balance Shaft myth debunked!!

      Personally, I would be comfortable interchanging balance shaft and non-balance shaft engines. Some members have replaced their balance shaft engines with non-balance shaft engines with no later problems. The engine should be more responsive to throttle change with less rotating mass.
       
    4. ncranchero

      ncranchero Co-moderator Staff Member Moderator Elite Explorer

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      Okay, that works. Now, is there any differences in the long block in a flex-fuel '03 and a non-flex '01?

      Thanks for the help, Dale! Long days this week and haven't had much search time.
       
    5. J08248

      J08248 New Member

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      Balance shaft

      Yes I too am on this venture. I have a 99 explorer 4x4 and looked at a 02 4.0 motor not knowing it was from a 4x2. Are the blocks the same? What makes the blocks different? Can I take the balance shaft from my motor and put it in the other motor? Thanks for any help?
       
    6. mr2fix2it

      mr2fix2it Active Member

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      I put a non balance shaft motor in my 98 and its been 7,000 miles no issues at all runs great .Flex fuel is different
       
    7. mr2fix2it

      mr2fix2it Active Member

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    8. SteFin

      SteFin Member

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      I installed an 02 engine in my 01 I had to use the 01 intake/plentium because of the wiring and sensor's loactions the coil bracket and wiring on the 01 is in the rear 02 up front.
       

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