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decode this block... please

Discussion in 'The Garage' started by 85 Jimmy, Apr 20, 2006.

  1. 85 Jimmy

    85 Jimmy Sheepdog Premium Member

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    the casting number is 10054727

    this is the block that i'm using for my truck, i know it's a 5.7l, and i know it's post 1987 but i'd like to know more about it

    any knowledge would be appreciated
     
  2. Mr.Chevy4x4

    Mr.Chevy4x4 1/2 ton status

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    10054727...350...86-up...2 or 4...one piece rear seal, some "Made in Canada"



     
  3. dyeager535

    dyeager535 1 ton status Premium Member

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    What is the suffix code?
     
  4. 85 Jimmy

    85 Jimmy Sheepdog Premium Member

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    what do you mean? where would i find that on the block?
     
  5. dyeager535

    dyeager535 1 ton status Premium Member

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    Passenger side, deck surface, behind where the alternator usually sits. It should be a two or three letter code (typical) in amongst a few other stamped in numbers. You can post all of them as stamped and it's easy to pick out the suffix.

    This is the ONLY thing that will tell you what the motor originally was installed in. HP, year, etc. Very rarely did GM recycle these numbers, so they are quite accurate.

    Obviously a rebuild would mean the code isn't that useful, and if the block has been decked, there will be no numbers there at all. But it is interesting to me to know what the engines donor was.

    Post that up, and if you've seen yet, whether two or four bolt.
     
  6. 85 Jimmy

    85 Jimmy Sheepdog Premium Member

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    K0602UKA

    i'm also very interested in it's donor, i just bought the engine from the dealership i work for for $50, the only reason the owner replaced it is b/c it burned a little oil, but that's all i know about the engine
     
  7. dyeager535

    dyeager535 1 ton status Premium Member

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    Of course...just when you talk good about suffix codes, this one doesn't match up :)

    http://www.nastyz28.com/spmenu.html

    That's what I use, but "UKA" from what you posted, shows as a 1981 block. Obviously not correct. They did "recycle" codes (fairly rarely), so it could be that yours is new enough that it hasn't been added.

    Post whether its two or four bolt when you find out.
     
  8. 76zimmer

    76zimmer Flyin Rat Premium Member GMOTM Winner

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    I think the letter codes shown were also used for years not posted. i.e. 62 codes were also used for 63, and 64 but not shown on the list.
     

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