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Browsing this Thread:   1 Anonymous Users

77mm A12 block
2001/5/3 7:04
From Hawaii, USA
Registered Users
Posts: 31102
For sale at auction

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:

jpg  77 mm bore.jpg (77.85 KB)
174_6142880d4051d.jpg 1200X900 px

jpg  identifying features - Block Code H85, low deck height, ID pad below top of block.jpg (129.32 KB)
174_614288239ae7e.jpg 1200X898 px

jpg  Left with Non-Equally spaced welsh plugs.jpg (111.48 KB)
174_6142885150408.jpg 1200X900 px

jpg  Bottom - would an A15 crank fit.jpg (130.13 KB)
174_6142886c66828.jpg 1200X900 px

jpg  cylinder walls from above.jpg (113.58 KB)
174_6142888ad589f.jpg 1200X898 px

jpg  cylinder walls from below.jpg (94.02 KB)
174_614288956cd46.jpg 1200X898 px

jpg  Left side foreward welch plug, motor mount studs.jpg (116.03 KB)
174_614288b4dafe3.jpg 1200X900 px

jpg  Top.jpg (123.21 KB)
174_614288c111d7f.jpg 1200X900 px

jpg  Right.jpg (132.66 KB)
174_614288ce2b51a.jpg 1200X900 px

Posted on: 9/16 0:59
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Re: 77mm A12 block
No life (a.k.a. DattoMaster)
2002/10/28 6:49
From Criminal Pig free land
Registered Users
Posts: 10810
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.

Posted on: 9/17 12:26
"Australia" means the Commonwealth of Australia and, when used in a geographical sense, includes Norfolk Island, the Territory of Christmas Island and the Territory of Cocos (Keeling) Islands, but does not include any other external Territory.
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