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3406a to 3406b

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by Onewolf81, Jul 13, 2021.

Page 1 of 3
  1. Jul 13, 2021 #1
    Onewolf81

    Onewolf81 Bobtail Member

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    I am restoring a 1973 Pete 359. It has a 3406a under the hood. I was wondering can I convert it to a 3406b? If so what do I need to change?
     
    Onewolf81, Jul 13, 2021
    Onewolf81, Jul 13, 2021
    #1
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  3. Jul 13, 2021 #2
    Onewolf81

    Onewolf81 Bobtail Member

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    Let me also add that it’s a pc engine with glow plugs and not DI. By swapping cylinder heads can I convert it to DI and get rid of the glow plugs?
     
    Onewolf81, Jul 13, 2021
    Onewolf81, Jul 13, 2021
    #2
  4. Jul 13, 2021 #3
    SmokinCAT

    SmokinCAT Road Train Member

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    Oct 20, 2010
    Hillsboro, OH./ Adrian, MI
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    The pump will not bolt to an early A block, you will need to swap complete engines.
     
    SmokinCAT, Jul 13, 2021
    SmokinCAT, Jul 13, 2021
    #3
    Bean Jr. and spsauerland Thank this.
  5. Jul 13, 2021 #4
    Onewolf81

    Onewolf81 Bobtail Member

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    I was afraid of that. Can I replace the cylinder head and get away from the glow plugs and go to direct injection?
     
    Onewolf81, Jul 13, 2021
    Onewolf81, Jul 13, 2021
    #4
  7. Jul 13, 2021 #5
    Last Call

    Last Call Road Train Member

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    Mar 15, 2021
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    This statement is coming from a purest that likes things to be Original... and your post said ..Restoring so JMO but trying to convert a A model to a B model is not a restoration that being said ..
    Then why not save yourself time & grief.. just swap it out for a B model in fact if I did it I would go the extra step and get a ATA B model.. but I would also make sure that my air charge rad. had room to fit in there and not look like some abortion that was done under a shade tree in the Sunny valley trailer park by Billy Bob with a torch and 30 pack of Natty light.. again this is JMO.. Its your truck
     
    Last Call, Jul 13, 2021
    Last Call, Jul 13, 2021
    #5
    p608 and Stray_Dog Thank this.
  8. Jul 13, 2021 #6
    SmokinCAT

    SmokinCAT Road Train Member

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    Oct 20, 2010
    Hillsboro, OH./ Adrian, MI
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    Yes, you would need to find a later DI head from an A model, they are not the same as the B.
     
    SmokinCAT, Jul 13, 2021
    SmokinCAT, Jul 13, 2021
    #6
    Oxbow, spsauerland and Roger McG Thank this.
  9. Jul 13, 2021 #7
    Onewolf81

    Onewolf81 Bobtail Member

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    Thanks everyone for all the input. The motor still runs strong so I’ll probably hold on on an engine swap. I will start looking for a later DI head for th a model
     
    Onewolf81, Jul 13, 2021
    Onewolf81, Jul 13, 2021
    #7
    Stray_Dog and baha Thank this.
  10. Jul 13, 2021 #8
    spsauerland

    spsauerland Road Train Member

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    May 31, 2010
    West Harrison, In
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    A JWAC B would be the best swap. I have a transplanted 400HP jwac B in my 82 W900.
     
    spsauerland, Jul 13, 2021
    spsauerland, Jul 13, 2021
    #8
    Bean Jr., Oxbow, Stray_Dog and 1 other person Thank this.
  11. Jul 13, 2021 #9
    AModelCat

    AModelCat Road Train Member

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    Canuckistan
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    I looked into converting my PCTA to DITA. Spent a bit of time browsing SIS and picking other member's brains. For the trouble it'd be I just dropped 6 new PC cylinder kits in it and left it alone.
     
    AModelCat, Jul 13, 2021
    AModelCat, Jul 13, 2021
    #9
    Isafarmboy and spsauerland Thank this.
  12. Jul 13, 2021 #10
    Onewolf81

    Onewolf81 Bobtail Member

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    I’ve seen several people mention SIS. What is it?
     
    Onewolf81, Jul 13, 2021
    Onewolf81, Jul 13, 2021
    #10
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