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3b Act II

Discussion in 'Builds and Fabricators Forum' started by 73 cj5, Jan 30, 2022.

  1. Jan 28, 2024
    73 cj5

    73 cj5 Not ready for the junkyard yet

    Clinton, Mississippi
    Joined:
    Jan 10, 2014
    Messages:
    2,141
    Well, here it is!

    [​IMG]
    [​IMG]

    Got the 3b involved to move the engine around.

    [​IMG]
     
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  2. Jan 29, 2024
    Keys5a

    Keys5a Sponsor

    Florida Keys
    Joined:
    Jan 23, 2014
    Messages:
    4,183
    So whats the weight of an aluminum Detroit 3-53? Still uses an iron head? Maybe 100-200lb more than the F-134?
    Years ago, a friend had an iron 3-53 in an M-715. That engine was over 1000 lb if I remember.
    The 3 cyl blowers make a bit more noise than the other Detriots; straight vanes vs twisted vanes.
    A Detroit sounds like nothing else!
    -Donny
     
    Last edited: Jan 29, 2024
    73 cj5, blalp!, Danefraz and 2 others like this.
  3. Jan 29, 2024
    Mr_Vaughan

    Mr_Vaughan New Member

    Central City, NE
    Joined:
    Apr 26, 2023
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    43
    my grandpa has one of those engines in a shed, and a really roached out 3b sitting in the woods. i had a whole thread on here a few years back theorizing about doing basically the same thing. im excited to see this. :twist:

    do you have the bellhousing for that engine? i didnt see it in any pics and if not its probably gonna be a bear to track down.
     
  4. Jan 29, 2024
    73 cj5

    73 cj5 Not ready for the junkyard yet

    Clinton, Mississippi
    Joined:
    Jan 10, 2014
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    Yep I have a bell housing for it.
     
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  5. Jan 29, 2024
    Buildflycrash

    Buildflycrash More or Less in Line. 2024 Sponsor 2022 Sponsor

    Gulf Breeze FL...
    Joined:
    Jun 5, 2007
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    3,584
    I was not at all familiar with this engine so I'm watching this video-

    He said 3.5 gal of Oil! :shock:
     
  6. Mar 12, 2024
    73 cj5

    73 cj5 Not ready for the junkyard yet

    Clinton, Mississippi
    Joined:
    Jan 10, 2014
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    Picked up an air horn, fan, and two spin on style fuel filter heads. Bought a NOS pressure plate and v belt tensioner from ebay. I'll be tearing into the SM420 shortly.

    [​IMG]
     
  7. Mar 12, 2024
    73 cj5

    73 cj5 Not ready for the junkyard yet

    Clinton, Mississippi
    Joined:
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    Yessir, the head is cast iron. I do believe it's around 1000 lb.
     
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  8. Apr 1, 2024
    73 cj5

    73 cj5 Not ready for the junkyard yet

    Clinton, Mississippi
    Joined:
    Jan 10, 2014
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    Took some time this weekend to crack open the 3-53. Now, I'm not an expert on the 2 stroke Detroits but I have done enough machine work on them to know a little about what I'm looking at.
    I figured the injectors were all stuck from it sitting so long and they were. PO tried to start it but thankfully he didn't have much luck.
    Anyhow, this mill has a spring rack which is pretty nice, so if an injector does stick it won't be an "uncontrollable" runaway.

    After removing the valve cover I noticed a lot of crustyness so I plugged up all the holes and got after it with brake cleaner and the air blower.

    [​IMG]

    [​IMG]

    Better than it was.

    [​IMG]

    I took off all the fuel lines and started to work on freeing up the injectors.

    https://imgur.com/pkzMODg

    The injector is freed up and a good example of how a spring rack works.

    https://imgur.com/HsyDTzl

    And here they are all freed up and silky smooth.

    https://imgur.com/mN01uYG
     
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  9. Apr 1, 2024
    73 cj5

    73 cj5 Not ready for the junkyard yet

    Clinton, Mississippi
    Joined:
    Jan 10, 2014
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    Started to tear into the SM420. Looks pretty good for 1961! Went ahead and ordered the Novak SM420/D20 adapter. The plan is to use my spare D20 and make a Super 18.

    [​IMG]

    [​IMG]

    I put the valve cover, oil and fuel filter housings, and injector lines in the vat overnight. Steam cleaned the filter housings and valve cover this morning and gave them an hour long soak in Evapo Rust. This stuff is awesome. I left the valve cover and injector lines in there to soak overnight.

    [​IMG]

    [​IMG]
    [​IMG]
     
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  10. Apr 7, 2024
    73 cj5

    73 cj5 Not ready for the junkyard yet

    Clinton, Mississippi
    Joined:
    Jan 10, 2014
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    2,141
    Dug out the D18 and D20 and managed to tear down the D20 this evening. Still waiting on a few things before I can try to start the 3-53.

    [​IMG]

    [​IMG]

    I had pulled these gears out of the D18 probably two or three years ago and had to do some digging to find them. I had Mcruff machine the intermediate gear for tapered roller bearings a while back too. Just need a rebuild kit and a few other small parts.

    [​IMG]

    Painted the valve cover.

    [​IMG]
     
    Last edited: Apr 7, 2024
  11. Apr 8, 2024 at 10:09 AM
    Mr_Vaughan

    Mr_Vaughan New Member

    Central City, NE
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    Apr 26, 2023
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    I don't know about anyone else, but I can't see any pictures.
     
  12. Apr 9, 2024 at 11:34 AM
    givemethewillys

    givemethewillys Been here since sparky ran it. 2022 Sponsor

    New Kent, VA
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    Jun 21, 2005
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    It's working fine for me...
     
  13. Apr 11, 2024 at 2:50 AM
    73 cj5

    73 cj5 Not ready for the junkyard yet

    Clinton, Mississippi
    Joined:
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    It's been a very long day.

    Test fit the adapter to the SM420. Seems to go together just fine.

    [​IMG]

    I spent the majority of the day working on the engine. I had a slew of work to do to it this afternoon but she runs!

    The fuel pump is junk. Full of rust and crud. I cleaned it up but it doesn't seem to have the correct size square drive off the governor to run it anyhow.

    [​IMG]

    [​IMG]

    Had to use the air blower to force fuel into the injectors. Not ideal but it worked.

    https://imgur.com/wQdGLu3
     
  14. Apr 11, 2024 at 8:09 AM
    ITLKSEZ

    ITLKSEZ Hope for the best, prepare for the worst

    Spokane Valley, WA
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    Aug 13, 2015
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    That’s awesome
     
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  15. Apr 11, 2024 at 8:14 PM
    blalp!

    blalp! Member 2024 Sponsor 2023 Sponsor 2022 Sponsor

    Concord, NH
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    That’s awesome on so many levels!
     
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