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Technical Y block ford block repair

Discussion in 'The Hokey Ass Message Board' started by 46international, Jan 13, 2020.

  1. cracked.jpg
    This is what I have, a Y block that is in very good shape but it has a crack at a main bearing saddle. This is not my block but an internet photo, mine is almost the same. Mine only has one crack off to the left of the bolt hole and no crack across the bearing area. My question is, can this be repaired? If you know anything about Y block motors, you know there was misprints in manuals and they listed a torque that was too high and Ford used bolts that were too short in the main caps. (they went to longer bolts at some point). So many of these blocks are cracked like this. Is there anyway to repair this.
     
  2. oldiron 440
    Joined: Dec 12, 2018
    Posts: 3,299

    oldiron 440
    Member

    I'd be looking for another block, but I suppose there's a fix.
     
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  3. yes, that is what I thought just hoping for someone to save me on this. Shame to toss out a 292 block.
     
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  4. oldiron 440
    Joined: Dec 12, 2018
    Posts: 3,299

    oldiron 440
    Member

    My luck I'd machine the block put main studs in it and line bore it and that peice would crack the rest of the way.
     
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  5. ahshoe
    Joined: Sep 12, 2012
    Posts: 963

    ahshoe
    Member

    I would hang onto it but find another one...never junk a Y block
     
  6. sunbeam
    Joined: Oct 22, 2010
    Posts: 6,213

    sunbeam
    Member

    That is the one area I would not do a repair. For a engine who extened pan flange was hyped for a strong bottom end I have seen many main web failers.
     
    Last edited: Jan 13, 2020
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  7. jimmy six
    Joined: Mar 21, 2006
    Posts: 14,795

    jimmy six
    ALLIANCE MEMBER

    A 272 block would do too. Contact Ted Eaton of Eaton Balancing in Texas for his opinion.
     
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  8. I would not fix it.
     
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  9. Boneyard51
    Joined: Dec 10, 2017
    Posts: 6,440

    Boneyard51
    Member

    What,Jimmy Six said!










    Bones
     
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  10. Yes a 272 will work. Ive got a 272 in my hoard that has a fresh rebore to a 292. The best fix is to swap in a FE
     
    Last edited: Jan 13, 2020
  11. RmK57
    Joined: Dec 31, 2008
    Posts: 2,659

    RmK57
    Member

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  12. I just looked them up, thanks. It looks like that is more for a crack that is in like a flat area, don't thinkit would work for me.
     
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  13. I got some 312s and a compleat 292 (although seized) in Glen Burnie if interested.

    Oldmics
     
  14. Oldmics, I have been to your place I bought that 3 speed from you a year and a half ago or so. Tell me more about that 292 you have.
     
  15. Oh man, don't say that!

    I have a running Y block in the car now I was just building a better one to swap in at some point.
     
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  16. I never heard of them.... just looked them up , Thanks! and sent an e-mail
     
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  17. Truck64
    Joined: Oct 18, 2015
    Posts: 5,325

    Truck64
    Member
    from Ioway

    He always says that. LOL!

    Nome sayin'?
     
  18. Mr48chev
    Joined: Dec 28, 2007
    Posts: 33,861

    Mr48chev
    ALLIANCE MEMBER

    Unless it is in a matching numbers restoration where the numbers count for show points or resale $$ I'd think that one could find another 292 block that wasn't cracked and have it machined with a lot better results. In this area at least they aren't all that rare yet.
     
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  19. jaracer
    Joined: Oct 4, 2008
    Posts: 2,417

    jaracer
    Member

    When I rebuilt my 312 I found the same cracks at three main bearings. On close inspection I found the cracks extended upwards towards the cam journals. I had a number of people familiar with Y blocks say that almost all the blocks, especially 312's, have these cracks and no one had ever heard of a failure because of them. A fairly long search resulted in finding a good 312 block and crank not too far from me.

    I did find that everyone that has an old Y block laying around is sure it's a 312. Most are 292's because they were in production the longest.
     
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  20. Boneyard51
    Joined: Dec 10, 2017
    Posts: 6,440

    Boneyard51
    Member

    You may have to call Ted, he’s a busy man. He knows his Y blocks!








    Bones
     
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  21. RmK57
    Joined: Dec 31, 2008
    Posts: 2,659

    RmK57
    Member

    I had read something on cracked main bearings and quite a few y-blocks were ruined with over torquing the the main caps. The early shop manuals stated 130 lbs. of torque which is a misprint.
    The real torque values are 95-105 lbs.
     
  22. jimmy six
    Joined: Mar 21, 2006
    Posts: 14,795

    jimmy six
    ALLIANCE MEMBER

    Ford at that was not a numbers matching company. Date codes on the cast iron would be the best way. I think Ford got into it around 67-69.
     
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  23. Do you have a pic of your actual block,,it might not be as bad as you think.
    Some of these old iron pieces can be repaired,,,welded very well.
    If it is not too bad,,,,,after repair and using studs,,it might be okay.
    Many years ago,,,I had bad problem,,,a Mopar 906 cylinder head with a hole in the chamber.
    These heads had many dollars of porting involved,,,so a replacement was a lot of work.
    The chamber had a 3/8 inch slot about 3/4 inch long in it,,,,in the flat of the chamber ,,into the water jacket .
    Hummm,,,,sounds like a piece of valve stem,,,,doesn’t it.
    Anyway,,,Indy cylinder head said they could fix it,,,I didn’t believe it,,,but they assured me they could. When I got it back,,,it was perfect,,,just like it never happened.
    I have heard of Hemi main webs and saddles being welded too.

    I know it probably easier for you to get another block,,,but you could keep your options open . Has anyone ever put 4 bolt main caps on a YBlock,,,,that night be an option too.

    Tommy
     
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  24. silent rick
    Joined: Nov 7, 2002
    Posts: 5,207

    silent rick
    Member

    ted is actually here on the hamb. hamb name is Tedd. that said, he was last here on new years eve @Tedd
     
  25. jimmy six
    Joined: Mar 21, 2006
    Posts: 14,795

    jimmy six
    ALLIANCE MEMBER

    Answers more on the YBlocksforever page. You can post a photo there too.
     
  26. Thanks guys, I have two leads on a "new" block I think I'll go that way
     
  27. Even FoMoCo swapped the Y blocks for FE's they did it in 63 for the cars and 65 for the trucks.
     

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