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Technical Question for Y block guys

Discussion in 'The Hokey Ass Message Board' started by King ford, Jan 23, 2020.

  1. King ford
    Joined: Mar 18, 2013
    Posts: 1,280

    King ford
    ALLIANCE MEMBER
    from 08302

    greetings HAMB brothers and sisters!....as my screen name indicates I love my FORDs but don't claim expert status! A good friend of mine has told me 312 crankshafts can be identified by an " aspirin sized bump" on the outer radius of the flywheel flange ....would this hold true for ALL of them, even " replacement " parts?....also are B8ae and ECZ both 292-312 blocks?...I'm pretty sure the ECZ is.....as always thanks in advance for any info!....also, yes I know that I could " sorta measure " the stroke with a rod down the sparkplug hole , just hoping for an easy ID in a field I.D. Type situation!
     
    Last edited: Jan 23, 2020
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  2. Wanderlust
    Joined: Oct 27, 2019
    Posts: 57

    Wanderlust

    I have heard about the asprin dot, never seen one but I believe that’s only on stock cranks. Easiest way I know is to drop the pan and check the caps EBU is 292. ECZ is 312
     
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  3. Almost all of the 312 cranks have the "dot"

    I have heard and also experienced one 312 crank that did not have the "dot" .That engine/crank without the "dot" was in a Canadian produced 312 engine.

    I dont believe there ever was a B8AE casting. There is a B9AE casting that is both a 312 and a 292. You will usually find those B9E casting in Mercurys.

    Picture of the 312 identifing "dot" below.

    Oldmics DSCF0330[1].JPG
     
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  5. My understanding is that crankshaft is the easiest identification. And, the one 312 I own has that feature on the crankshaft so at least that one was verified that way.
     
  6. egads
    Joined: Aug 23, 2011
    Posts: 553

    egads
    ALLIANCE MEMBER

    Take a 312 crank and cut the mains to fit the 292 block; 312 pistons and rods and you have a 312. EASY.
     
  7. Or just bore a 292 out .125 and you have a 312. ;)
     
  8. Not quite right !

    312s came out in 1956 .They did cease to be installed into Ford applications in 1957 , however Mercury continued on with the 312 until 1960.

    Oldmics
     
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  9. Yep, my 312 is a 56.
     
  10. King ford
    Joined: Mar 18, 2013
    Posts: 1,280

    King ford
    ALLIANCE MEMBER
    from 08302

    Thanks for all the info guys, the story on my engine is this...my slightly off topic 1960 3/4 ton four wheel drive truck was bought by my uncle in about 1963 and had a spun bearing. When having it repaired he wanted a 312 crank installed and believed that one was. I am going to study John Mummerts web site and see what I can learn further!...thanks again guys!
     

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