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Revision as of 10:43, 3 January 2016 ddgonzal (Talk | contribs) (->Cylinder Blocks) Next diff -> |
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| == Original Block == | == Original Block == | ||
| - | H10 block castings | + | 11010-H2300 A12 BARE BLOCK 73mm/2.87" bore size |
| - | [http://datsun1200.com/modules/myalbum/photo.php?lid=19179 http://datsun1200.com/modules/myalbum/photos/thumbs/19179.jpg] | + | * running change replaced 11010-H1000 |
| - | 11010-H2300 A12 BARE BLOCK 73mm/2.87" bore size | + | |
| - | * USA 11010-H2300 0570- ALL <> 11010-H1000 | + | |
| - | * USA 11010-H1000 -0470 | + | |
| - | * JPN 11010-H2300 GX, running change replaced <2,0> 11010-H1000 | + | |
| - | * JPN 11010-H1000 except GX | + | |
| - | M08 block from 1970-1973 E10 Nissan Cherry X-1R A12T | + | H10 block castings |
| - | [http://datsun1200.com/modules/myalbum/photo.php?lid=2636 http://datsun1200.com/modules/myalbum/photos/thumbs/2636.jpg] | + | <br>[http://datsun1200.com/modules/myalbum/photo.php?lid=19179 http://datsun1200.com/modules/myalbum/photos/thumbs/19179.jpg] |
| - | M15 E10 Cherry A12 single-carb | + | |
| == Redesigned Block == | == Redesigned Block == | ||
| - | * 11010-H5000 A12 73mm bore size | + | * 11010-H5000 A12 [[B120]] From July 1973 (?) |
| - | * 11010-G1600 A12 From June 1975 (?) | + | * 11010-G1600 A12 B120 From June 1975 (?) |
| - | * 11010-G1618 A12 B120 7908-8503 | + | * 11010-G1618 A12 B120 7908-8503 |
| - | * 11010-G1619 A12 B120 8504- | + | * 11010-G1619 A12 B120 8504- (M79 casting) |
| - | *: M79 casting | + | |
| - | *: [http://datsun1200.com/modules/myalbum/photo.php?lid=21287 http://datsun1200.com/uploads/thumbs/21287.jpg] | + | |
| - | * 11010-H9960 A12A BARE BLOCK B310 75mm/2.95" bore size | + | |
| - | * 11010-H8500 Sedan, Coupe B310 -8010 | + | |
| - | * 11010-H9463 Van B310 8011-8109, 8110- | + | |
| - | M79 casting, from late 1200 Sunny Truck | + | M79 casting, from 1200 Sunny Truck |
| - | <br>[http://datsun1200.com/modules/myalbum/photo.php?lid=21287 http://datsun1200.com/uploads/thumbs/21287.jpg] [http://datsun1200.com/modules/myalbum/photo.php?lid=21288 http://datsun1200.com/uploads/thumbs/21288.jpg] | + | <br>[http://datsun1200.com/modules/myalbum/photo.php?lid=21287 http://datsun1200.com/uploads/thumbs/21287.jpg] [http://datsun1200.com/modules/myalbum/photo.php?lid=21288 http://datsun1200.com/uploads/thumbs/21288.jpg] |
| = Overbore = | = Overbore = | ||
Revision as of 10:43, 3 January 2016
The A12 engine of the Datsun 1200 features a modern lightweight cast-iron cylinder block. For an overview of all A-series engines see Block Comparison.
Contents |
Identification
A12 can be positively identified by looking for the engine Stamped ID - see main article: Engine ID Mark
Ventilation
Under the block breather pipe, this steel mesh separates out the oil vapor from crankcase ventilation air.
Dimensions
A12 Deck Height is 189.1 mm. A10 engines are 10 mm shorter, and A14 is 15 mm taller. For more details see Block Comparison#Dimensions.
Length is the same for a A-series engine blocks.
Head Locating Dowels
Starting with A12 engine for B210 and including later 1200, dowels were used to locate the Cylinder Head.
11053-73400 DOWEL-BLOCK TO HEAD 14 diameter 2
Cylinder Blocks
Also see: Block Comparison
The block has ~2.5 liter coolant capacity.
Original Block
11010-H2300 A12 BARE BLOCK 73mm/2.87" bore size * running change replaced 11010-H1000
H10 block castings
Redesigned Block
* 11010-H5000 A12 B120 From July 1973 (?) * 11010-G1600 A12 B120 From June 1975 (?) * 11010-G1618 A12 B120 7908-8503 * 11010-G1619 A12 B120 8504- (M79 casting)
M79 casting, from 1200 Sunny Truck
Overbore
The 1971-1973 A12, the one with the front distributor, can usually be bored to 76mm. This is the same as a stock A14 and will increase HP much more than going to high compression.
See main article: Bored And Stroked
Crankshafts
A12 uses a forged crankshaft, so it is plenty strong -- even for 8500 RPM use.
Stroke: 70mm (2.76 in.)
For more details and part numbers, see Crankshaft
Connecting Rods
Stock A-series rods are forged, and will last a lifetime in a stock or moderately upgraded performance engine. There is no need to use a heavier duty rod unless you are using a high boost turbo or supercharger, or revving higher than 8500 RPM.
See main article: Connecting Rods
Pistons
A12 engine came with dished pistons for approximately 9.0:1 compression ration. Standard bore size for the A12 or A13 block is 73mm/2.874". Pistons are cast. Nissan Competition does not recommend forged pistons for street use.
See main article: Piston
Main Bearing Caps
Also see: ARP
12293-18001 BOLT-MAIN BEARING CAP (10) L=72.5 <> 12293-01M00 * A12/A14/A15 engine (quantity 10) * L16, L18 and L20B engine (10) * 720,D21,S110 with Z20/Z22/Z24E/Z24I (10) * 910,S130 with L24/L28E (14) * B11, N10/N12 with E15/E16 (10) * D21 PICKUP with KA24E engine (10)