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= Ventilation = | = Ventilation = | ||
- | {{Album|18283}} | ||
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Under the block [[Breather Tubes|breather pipe]], this steel mesh separates out the oil vapor from [[PCV|crankcase ventilation]] air. | Under the block [[Breather Tubes|breather pipe]], this steel mesh separates out the oil vapor from [[PCV|crankcase ventilation]] air. | ||
+ | <br>{{Album|27096}} {{Album|18283}} | ||
- | http://i1085.photobucket.com/albums/j434/Daisblade/510%20waGoon/th_IMAG0845_zps9096b993.jpg http://i1085.photobucket.com/albums/j434/Daisblade/510%20waGoon/th_IMAG0847_zps903d3fb8.jpg | + | [[Block_%26_Pan_Part_Numbers|11037-H1000]] NET-STEEL CRANK CASE A12/A13/A14/A15 |
+ | 08310-61214 SCREW-MACHINE (2) | ||
+ | 11038-H1000 PLATE-BAFFLE CRANK CASE A12/A13S | ||
+ | 11038-H6200 PLATE-BAFFLE CRANK CASE A14 EARLY H72 BLOCK | ||
+ | 11038-H9700 PLATE-BAFFLE CRANK CASE A14 LATE + A15 G34 BLOCK | ||
= Dimensions = | = Dimensions = |
Revision as of 09:59, 20 July 2018
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.
11037-H1000 NET-STEEL CRANK CASE A12/A13/A14/A15 08310-61214 SCREW-MACHINE (2) 11038-H1000 PLATE-BAFFLE CRANK CASE A12/A13S 11038-H6200 PLATE-BAFFLE CRANK CASE A14 EARLY H72 BLOCK 11038-H9700 PLATE-BAFFLE CRANK CASE A14 LATE + A15 G34 BLOCK
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
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)
H50 casting, from 1974-1985(?) Datsun 1200
M79 casting, from 1985-1994 Datsun 1200
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)