Engine ID Mark

Nissan A Engines: Overview | A10 | A12 | A12A | A13, old | A13, new | A14 | A15

The engine number is stamped on the engine block itself. It positively identifies the engine size (e.g. A12) as well as the serial number. The mark is always on the left (distributor) side of a Datsun A-series engine, but the location varies with the year. If you do not see the number, wipe the grease off the engine block.

Engine Number

Left Side of Engine --------------------------------- To about 1980 | From about 1981 Below #4 plug | Below #2 plug ---------------------------------

1970-1973

1970-1973 A12 Engine ID Mark is below #4 spark plug, on jutting pad (above starter)

Upload click to view Album 770 Upload click to view Upload click to view

1973-1981

Model years 1974~1981 A12 ID Mark, below #4 plug

the pad is flat to the engine

https://i297.photobucket.com/albums/mm219/ddgonzal/Canby%202009/20090613165906DSC07030.jpg

Stamp is below #4 spark plug, on vertical pad

https://i297.photobucket.com/albums/mm219/ddgonzal/Datsun%201200/wiki/17147.jpgAlbum click to view

Early Tall-Block (A13/A14/A15) has large space between serial number pad and cylinder head

Album 16699

A13 tall block (1974 model year)

Album 28747

Album 28748

1981-1995

Model years 1982-1995 A12 ID Mark Type B is below #2 & #3 spark plugs, center of block, above fuel pump, forward of distributor

Album 23706 Album 23705

A12-E

Album 26177

Late: above fuel pump boss, below #2 plug

Album 18742 Album 23704

Late Tall-block (A14 or A15) ID Mark location is below #2 & #3 spark plugs, center of block, above fuel pump, forward of distributor

Album 18238

Matching Numbers

If the engine is the original one, the serial number will match that on the Model Number Plate.

https://i297.photobucket.com/albums/mm219/ddgonzal/Datsun%201200/1973%20Catalog/_10b.jpg 

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