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ddgonzal
M72 block for A14
#1
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The M72 block is relatively rare, probably because it was used in the fwd F10 Datsun Cherry. As far as I can tell, it's identical to the H74 block used in B210, but if can get more photos, that would help

Attach file:


jpg  M72 cast id.jpg (124.08 KB)
174_680ddc3938a84.jpg 1200X900 px

jpg  M72 deck right side.jpg (92.66 KB)
174_680ddc88419f9.jpg 1200X900 px

jpg  M72 front face.jpg (102.55 KB)
174_680ddc9254d37.jpg 1200X900 px

jpg  M72 left side.jpg (121.02 KB)
174_680ddc98aa76b.jpg 1200X900 px

jpg  M72 rear face.jpg (121.22 KB)
174_680ddca64a9c9.jpg 1200X900 px

Posted on: 4/27 8:28
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ddgonzal
Re: M72 block for A14
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The serial number is interesting. The little pad is stamped 'B"

Attach file:


jpg  A14 serial number.jpg (140.95 KB)
174_680ddcf5bc2d9.jpg 1200X900 px

jpg  serial number B.jpg (37.04 KB)
174_680ddcffe2e21.jpg 600X450 px

Posted on: 4/27 8:30
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ddgonzal
Re: M72 block for A14
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the main bearing caps are numbered

Attach file:


jpg  Main cap numbers.jpg (94.32 KB)
174_680dddfc05946.jpg 1200X900 px

jpg  M72 MAINS.jpg (102.19 KB)
174_680dde213ea32.jpg 1200X900 px

Posted on: 4/27 8:31
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ddgonzal
Re: M72 block overbore
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looks like a 1.1mm overbore (stock is 76mm for both A14 and A15)

Attach file:


jpg  75.11 bore.jpg (28.85 KB)
174_680ddf91bde35.jpg 600X450 px

Posted on: 4/27 8:40

Edited by ddgonzal on 2025/4/30 0:33:02
Edited by ddgonzal on 2025/4/30 0:36:30
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ddgonzal
Re: M72 block for A14
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Yikes, I don't know what 75.11mm means

Posted on: 4/30 0:34
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smellsofbikes
Re: M72 block for A14
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that is a very classy typeface for that A14 stamp.

Posted on: 5/1 4:06
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D
Re: M72 block for A14
#7
No life (a.k.a. DattoMaster)
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From under the Firmament LOL no twiglight effect BS
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Looking at the main caps one can see that 4 bolt mains could be used
specially when fitting the 88mm stroke E16 crankshaft to secure it
further for high rpm operation.
These engines and the L series were way over engineered with extra
material but the A series is heavier than the L16 by 2-3kg when
L16 is bored out to 86mm.
Interesting the A14, L16 and Ca18 bare blocks weighed just under 40kg.

Posted on: 5/7 4:32
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