Register now to get rid of these ads!

Technical Block identification help?

Discussion in 'The Hokey Ass Message Board' started by Jim Lato, Aug 29, 2019.

  1. Jim Lato
    Joined: Jun 4, 2017
    Posts: 601

    Jim Lato
    Member

    Went on nastyz28 to decode these numbers and I’m getting hung up on several different stamps. I’ll give some photos of the block stamps and heads[​IMG][​IMG][​IMG]

    It’s a SGI block which I’ve been reading up on and seems like it’s a good block to build on, there is another code here that I can’t seem to get the photo to upload but it’s the basic liter size and all that. Big number 4 gm 5.7 G then it says SGI, standard info kinda there. But above it it says D148
    I don’t think the heads are good but I’m no expert so I’ll upload that as well. Just wondering about this block first time I’ve seen the SGI and it says they come out of interceptors trucks or corvettes? [​IMG][​IMG]


    Sent from my iPhone using Tapatalk
     
  2. Jim Lato
    Joined: Jun 4, 2017
    Posts: 601

    Jim Lato
    Member

    It’s got 638 stamped on the side of the block as well. Doing research it seems the 638 is the better one?


    Sent from my iPhone using Tapatalk
     
  3. Bandit Billy
    Joined: Sep 16, 2014
    Posts: 12,286

    Bandit Billy
    ALLIANCE MEMBER

    It is hard to tell from your picture but those don't look like GM broach marks on the block boss. Re Stamp? A plausibility.
     
  4. Budget36
    Joined: Nov 29, 2014
    Posts: 13,173

    Budget36
    Member

    I think the 624 heads are large chamber head...trucks, etc...like 76cc, but don't know or recall if they are a good head to use or not. The stamping on the block with the V0 xxxxx etc, should tell you what the engine came from.

    Rebuilders tag is not going to tell you anything.

    Have you tried mortec.com? I used to use that site, but haven't in a long time.
     

  5. squirrel
    Joined: Sep 23, 2004
    Posts: 55,931

    squirrel
    Member

    partial VIN CJE.... tells us

    C is Chevy Truck
    J is 1989
    E is the vehicle assembly plant, Linden, where they made Blazers

    So, it's a 1989 truck block.

    Does that answer your most basic questions?
     
    Last edited: Aug 29, 2019
  6. A few more pics would help.
    Does it have the bosses in the lifter valley for a roller spider?
    I have one,,I will try to upload a pic tomorrow and tell you what is in mine
    A really nice block,,,all in all,,,good block.

    Tommy
     
    Last edited: Aug 29, 2019
    Jim Lato likes this.
  7. The reason that you're having trouble uploading these pics is that they're 4032 × 3024 pixels. That's 12MP and a lot larger than they need to be. Try downsizing them first to something around 1000 pixels on the longest side or shoot them at a lower resolution and they'll upload in the blink of an eye. ;)
     
  8. 1934coupe
    Joined: Feb 22, 2007
    Posts: 5,051

    1934coupe
    Member

    Oct 28 1988 block, late model 350 thin wall casting SBC

    Pat
     
  9. squirrel
    Joined: Sep 23, 2004
    Posts: 55,931

    squirrel
    Member

    that Oct 28 19x8 date code is the cylinder head, not the block.

    He said the block says D 14 8 on it, either way, it's from that era, the blocks were mostly the same from 1986-94ish.
     
    Jim Lato likes this.
  10. s55mercury66
    Joined: Jul 6, 2009
    Posts: 4,335

    s55mercury66
    Member
    from SW Wyoming

    Look and see if it is machined for a mechanical fuel pump, some are, some are not completely machined for one, and some are not machined for one at all.
     
  11. Mr48chev
    Joined: Dec 28, 2007
    Posts: 33,861

    Mr48chev
    ALLIANCE MEMBER

    I think that they pretty well nailed it. The reman number simply means that at one tie it was sent to a production rebuild shop and was "rebuilt" The tag was their warranty tracking tag.
    What that means now is that it was probably bored oversize but other than that you had better check every bearing and mike every throw and journal on the crank as some of those rebuild shops went way past what we as Hambers would consider to be a safe cut on the rods or mains. I've seen them with .040 under on the rods and .060 on the mains before. That is rare but those shops don't throw anything away unless it is so bad they can't make it usable .
     
  12. Jim Lato
    Joined: Jun 4, 2017
    Posts: 601

    Jim Lato
    Member

    Good lord overkill. Man thanks for the help. On that machined lip what’s up with the two different lines of codes? One looks like it was stamped at once and the other looks individually stamped. But I tried looking up the info cause I thought you were able to grab more info off this block like hp or what it came in. I could be mistaken. But do you guys think since this is a stronger casted block “SGI” that it would make for a good motor build? I’m taking it in to get sonic tested to see how far out I can build it. I got a hand full of blocks to choose from but I forgot I had this one. Found it under a a calf hutch here on the farm four bolt main, one piece rear seal, and I’ll have to look at it more to answer more of your guys questions.


    Sent from my iPhone using Tapatalk
     
  13. Jim Lato
    Joined: Jun 4, 2017
    Posts: 601

    Jim Lato
    Member

    It’s machined for a mechanical fuel pump. I removed it during stripping the thing Down, rod and all


    Sent from my iPhone using Tapatalk
     
  14. Jim Lato
    Joined: Jun 4, 2017
    Posts: 601

    Jim Lato
    Member

    I will have to check this out. I’ll let you know tomorrow Tommy


    Sent from my iPhone using Tapatalk
     
  15. Jim Lato
    Joined: Jun 4, 2017
    Posts: 601

    Jim Lato
    Member

    Yea I don’t know if these are decent heads, from what I read they are so so, thin casted and crack easy.


    Sent from my iPhone using Tapatalk
     
  16. Jim Lato
    Joined: Jun 4, 2017
    Posts: 601

    Jim Lato
    Member

    Well my curiosity has me going now after saying that. I’m unsure completely


    Sent from my iPhone using Tapatalk
     
  17. squirrel
    Joined: Sep 23, 2004
    Posts: 55,931

    squirrel
    Member

    That is factory GM broaching on the deck, and they are factory stampings.

    Those two series of stamped numbers tell us exactly what the block is. No need to worry about all the other numbers.
     
    Desoto291Hemi likes this.
  18. Her are some pics of mine
     

    Attached Files:

  19. This block was not a roller block,,,but it had the bosses cast into the lifter valley.
    All I did was buy a spider and mock it up where it should sit,,,I marked the place and drilled and tapped the holes.
    The front of the block had the bosses where the cam retainer holds the roller cam in.
    I purchased a retainer and marked the hole location,,,drilled and tapped.
    It fit perfect.
    The only thing I am disappointed about is the block is not drilled for a mechanical fuel pump,,,,really disappointed about that!
    I plan on using an Edelbrock intake that I have not finished cleaning yet,,,and a Chevy dual point distributor. Old school M/T valve covers,,,and stuff on that order. It’s a 2 bolt main block if I remember correctly.
    Sorry about the aluminum heads,,,,I got them dirt cheap (brand new),,,all the head gear is new..

    I got the engine from my Daddy,,,it only had about 80000 miles on It,,I got the short block.
    He is 90 years old and I wanted to use this as something to remember him by in the future
    I only used the block and crank,,,,all else inside is new,,,I probably went a little too radical inside,,,that is one of my shortcomings lol.
    Block was perfect,,,standard bore,,,,crank was also,,standard,standard.

    Tommy
     
    Last edited: Aug 30, 2019
  20. Here are some more pics I had to put on my iPad from my phone.
    I always paint mark my bolts after being torqued,,,just a safety feature I rely on.
    I also mic all the pistons and fit them in the best sized bore.
    It has I beam rods with floating pins and Speed Pro pistons .
    Not too bad for a dumb ole country boy.

    Tommy
     

    Attached Files:

Share This Page

Register now to get rid of these ads!

Archive

Copyright © 1995-2021 The Jalopy Journal: Steal our stuff, we'll kick your teeth in. Terms of Service. Privacy Policy.

Atomic Industry
Forum software by XenForo™ ©2010-2014 XenForo Ltd.