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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.
Contents |
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)
1973-1981
Model years 1974~1981 A12 ID Mark, below #4 plug
the pad is flat to the engine
Stamp is below #4 spark plug, on vertical pad
Early Tall-Block (A13/A14/A15) has large space between serial number pad and cylinder head
A13 tall block (1974 model year)
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
A12-E
Late: above fuel pump boss, below #2 plug
Late Tall-block (A14 or A15) ID Mark location is below #2 & #3 spark plugs, center of block, above fuel pump, forward of distributor
Matching Numbers
If the engine is the original one, the serial number will match that on the Model Number Plate.
