For sale at auction

https://aucview.aucfan.com/yahoo/k493441051

Seller says it's an A15 and indeed the engine stamp says 'A15' however the 5 is off kilter

H85 is the B310 Sunny 1978-1982 A12 block with 73mm bore. A15 is 76mm. Can these later A12s be bored out to 77mm? I wonder if an A15 crank would fit in there

After thinking about it I marked up some of the photos to show the identifying features. It has a 77mm bore and is marked 'A15' but otherwise is a short-deck A12 block

Attach file:

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  77 mm bore.jpg (77.85 KB)


  identifying features - Block Code H85, low deck height, ID pad below top of block.jpg (129.32 KB)


  Left with Non-Equally spaced welsh plugs.jpg (111.48 KB)


  Bottom - would an A15 crank fit.jpg (130.13 KB)


  cylinder walls from above.jpg (113.58 KB)


  cylinder walls from below.jpg (94.02 KB)


  Left side foreward welch plug, motor mount studs.jpg (116.03 KB)


  Top.jpg (123.21 KB)


  Right.jpg (132.66 KB)

nice find but also there were low height A13 engines with 76mm bores and 70mm crank as well as tall block A13 with 77mm strokes last I recall. Maybe they used an A13 short height block? Datsun peeps are spoilt for A series combos.