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| - | [http://datsun1200.com/modules/myalbum/photo.php?lid=770 http://datsun1200.com/modules/myalbum/photos/thumbs/770.jpg] A12 Engine ID Mark | + | 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]]. |
| - | == Cylinder Blocks == | + | = Identification = |
| - | * 11010-H2300 A12 BARE BLOCK 73mm/2.87" bore size | + | A12 can be positively identified by looking for the engine Stamped ID. |
| - | * 11010-H9960 A12A BARE BLOCK 75mm/2.95" bore size | + | |
| - | * 11010-H6200 [1974] A13 BARE BLOCK 73mm/2.87" bore size | + | |
| - | * 11010-H9700 A14/A15 BARE BLOCK 76mm/2.99" bore size | + | |
| + | See Main Article: [[Engine ID Mark]] | ||
| - | == Crankshafts == | + | {{Album!|770}} |
| - | * 12200-H8515 A12/A12A CRANKSHAFT 70mm/2.76" stroke | + | |
| - | * 12200-H5720 A12 COMPETITION CRANKSHAFT 70mm/2.76" stroke | + | |
| - | * 12200-H8915 A13/A14 CRANKSHAFT 77mm/3.03" stroke | + | |
| - | * 12200-G3400 A15 CRANKSHAFT 82mm/3.23" stroke | + | |
| + | = Ventilation = | ||
| + | Under the block [[Breather Tubes|breather pipe]], this steel mesh separates out the oil vapor from [[PCV|crankcase ventilation]] air. | ||
| + | <br>{{Album|18283}} {{Album|27096}} | ||
| - | MAIN BEARING (#1/#5, SHELL THICKNESS) | + | [[Block_%26_Pan_Part_Numbers|Part Numbers]] |
| - | <br>4 each required | + | {{searchPart|11037-H1000}} NET-STEEL CRANK CASE A12/A13/A14/A15 |
| - | * 12215-H2310 .0720" | + | 08310-61214 SCREW-MACHINE (2) |
| - | * 12215-H2311 .0718" | + | 11038-H1000 PLATE-BAFFLE CRANK CASE A12/A13S |
| - | * 12215-H2312 .0715" | + | 11038-H6200 PLATE-BAFFLE CRANK CASE A14 EARLY H72 BLOCK |
| + | 11038-H9700 PLATE-BAFFLE CRANK CASE A14 LATE + A15 G34 BLOCK | ||
| + | H97 baffle plate | ||
| + | <br>{{Album|30364}} | ||
| - | MAIN BEARING (#2/#4, SHELL THICKNESS) | + | baffle plate bolts in rear portion of the engine block |
| - | <br>4 each required | + | <br>{{UploadPost|174_67b163d1d47cf.jpg|498788}} |
| - | * 12231-H2310 .0720" | + | |
| - | * 12231-H2311 .0718" | + | |
| - | * 12231-12312 .0715" | + | |
| + | 日産 A型 ブロック換気バッフル | ||
| - | MAIN BEARING (CENTER, SHELL THICKNESS) | + | = Dimensions = |
| - | <br>2 required | + | 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]]. |
| - | * 12247-H2310 .0720" | + | |
| - | * 12247-H2311 .0718" | + | |
| - | * 12247-H2312 .0715" | + | |
| + | Length is the same for a A-series engine blocks. | ||
| + | {{Album|19202}} | ||
| - | == Connecting Rods == | + | = Drain Plug = |
| - | 4 of each required: | + | {{AlbumC|15004|h=50|shape=27205|t=128|l=310}} |
| - | * 12100-H1000 A12 CONNECTING ROD 121.5mm/4.78" center-to-center | + | |
| - | * 12100-18500 A12A CONNECTING ROD 121.5mm/4.78" center-to-center | + | |
| - | * 12100-16200 [1974] A13 CONNECTING ROD 133mm/5.24" center-to-center | + | |
| - | * 12100-17200 A14/A15 CONNECTING ROD 133mm/5.24" center-to-center | + | |
| + | Buy at [http://www.datsun1200.asia/category/select/pid/9244 Bprojects] | ||
| + | [[Block & Pan Part Numbers|08931-30410]] PLUG-TAPER THREAD WATER DRAIN | ||
| + | * Fit all A-series block all years | ||
| + | * Size: 1/4 inch NPT | ||
| + | * Wrench Size: 14mm | ||
| + | * Overall length: 18.5mm | ||
| - | ROD BOLT | + | {{Album|28804|was=Photo\08931-30410.jpg\Datsun%201200/Parts}} {{Album|28805|was=Photo\08931-30410-.jpg\Datsun%201200/Parts}} |
| - | The Datsun rod bolt is a true stretch bolt and should be torqued only once. New bolts should be installed at every disassembly. 8 each required: | + | |
| - | * 12109-H1001 CONNECTING ROD BOLT | + | |
| - | * 12112-H1000 CONNECTING ROD NUT | + | |
| + | = Head Locating Dowels = | ||
| + | Starting with A12 engine for B210 and including later 1200, dowels were used to locate the [[Cylinder Head]]. | ||
| - | CONNECTING ROD BEARINGS | + | {{Photo|head_dowels.jpg}} |
| - | The -25720/-H2310 bearing shell produces the most desirable bearing clearance for racing purposes when applied to a standard size crankshaft. The other shells exist in order to obtain proper clearance when compensating for the variations in the crankshaft or connecting rod journals. | + | |
| - | 8 each required: | + | 11053-73400 DOWEL-BLOCK TO HEAD 14 diameter 2 |
| - | * 12111-25720 .0590" | + | |
| - | * 12111-25721 .0588" | + | |
| - | * 12111-25722 .0585" | + | |
| - | * 12111-25723 .0592" | + | |
| - | * 12111-25724 .0583" | + | |
| - | == Pistons == | + | = Cylinder Blocks = |
| - | 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. | + | Also see: [[Block Comparison]] |
| + | The block has ~2.5 liter [[Radiator|coolant capacity]]. | ||
| - | [[A12GX engine]] came with two kinds of pistons: | + | {{Photo|n59975533yoshi_senna-img600x450-1211090038fvol0413765.jpg}} |
| - | * dished for low-gas (regular octane) engine | + | |
| - | * flat-top for high-gas (high octane) engine | + | |
| + | == Original Block == | ||
| + | 11010-H2300 A12 BARE BLOCK 73mm/2.87" bore size | ||
| + | * running change replaced 11010-H1000 | ||
| - | === Piston Comparisons/Potential Swaps === | + | H10 block castings |
| - | ? | + | <br>{{Album|19179}} |
| + | == 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) | ||
| - | === Nissan Competition Parts === | + | H50 casting, from 1974-1985(?) Datsun 1200 |
| - | NOTE: 99996- part numbers are Nissan Competition | + | <br>{{Album|20516}} |
| - | A12/A13 FACTORY CAST FLAT-TOP PISTONS | + | M79 casting, from 1985-1994 Datsun 1200 |
| - | Cylinder wall thickness should be checked by sonic testing when increasing initial bore size in excess of 1 mm/.03937". Standard bore size for the A12 or A13 block is 73mm/2.874". | + | <br>{{Album|21287}} {{Album|21288}} |
| - | * 12010-H2361 73MM/2.874" PISTON | + | |
| + | = 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. | ||
| - | PISTON RING SET | + | See main article: [[Bored And Stroked]] |
| - | * 12033-H6200 RING SET FOR 12010-H2361 | + | |
| - | * 12010-12364 73.5/2.894" PISTON | + | |
| - | * 12035-H6200 RING SET FOR 12010-H2364 | + | |
| - | * 12010-H2366 74mm/2.913" PISTON | + | |
| - | * 12037-H6200 RING SET FOR 12010-H2366 | + | |
| - | * 12010-H2310 73MM/2.874" PISTON Similar to 12010-12361 except for valve reliefs for increased piston-to-valve clearance | + | |
| - | * 12033-H6200 RING SET FOR 12010-H2310 | + | |
| + | = Crankshafts = | ||
| + | A12 uses a forged crankshaft, so it is plenty strong -- even for 8500 RPM use. | ||
| - | <!-- Editors: From Nissan. Please do not edit --> | + | Stroke: 70mm (2.76 in.) |
| - | ARIAS FORGED RACING PISTONS | + | |
| - | <br>All of the forged pistons are of the dome-top design. Modifications must be made to the spark plug side of the combustion chamber for proper clearance. The compression ratio will vary depending on the swept volume of the engine and amount of material removed from the cylinder head. Piston-to-wall clearance for forged pistons should be approximately.005" to .007". All forged pistons use a full-floating .750" pin retained by Teflon buttons. For this reason the A12 and A12A pistons require the use of the A12A connecting rod (12100-98500). Also, the A13 and A14 pistons require the use of the A14 connecting rod (12100-H7200). Because of the full-floating pin the small end of the rod should be sized with a clearance of .0006" to .0009". End gap for the top ring should be .012" to .015". The second ring should have an end gap of .010" to .013". Clearance on the oil scraper ring is not critical. Forged pistons are not recommended for street use. | + | For more details and part numbers, see [[Crankshaft]] |
| - | <!-- no edit --> | + | |
| - | PART NO. DESCRIPTION QTY REQ. | + | = Connecting Rods = |
| - | * 99996-H1017 73MM/2.874" A12/A13 PISTON 4 | + | 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. |
| - | * 99996-H1027 RING SET FOR 99996-H1017 1 | + | |
| - | * 99996-H1022 REPLACEMENT PIN FOR 99996-H1017 4 | + | See main article: [[Connecting Rods]] |
| - | * 99996-H1123 REPLACEMENT BUTTON FOR 99996-H1017 8 | + | |
| - | * 99996-H1011 74MM/2.913" A12/A13 PISTON 4 | + | {{Album!|15725}} |
| - | * 99996-H1021 RING SET FOR 99996-H1011 1 | + | |
| - | * 99996-H1022 REPLACEMENT PIN FOR 99996-H1011 4 | + | = Pistons = |
| - | * 99996-H1127 REPLACEMENT BUTTON FOR 99996-H1011 8 | + | 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. |
| - | * 99996-H1060 76MM/2.992" A12A/A14 PISTON 4 | + | |
| - | * 99996-H1065 RING SET FOR 99996-H1060 1 | + | |
| - | * 99996-H1022 REPLACEMENT PIN FOR 99996-H1060 4 | + | |
| - | * 99996-H1124 REPLACEMENT BUTTON FOR 99996-H1060 1 | + | |
| - | * 99996-H1061 76.75MM/3.022" A14 PISTON 4 | + | |
| - | * 99996-H1067 RING SET FOR 99996-H1061 | + | |
| - | ** This ring set is designed for 77mm/3.032" pistons, therefore, some sizing will be necessary to achieve the proper end gap. 1 | + | |
| - | * 99996-H1022 REPLACEMENT PIN FOR 99996-H1061 4 | + | |
| - | * 99996-H1023 REPLACEMENT BUTTON FOR 99996-H1061 8 | + | |
| - | * 99996-H1062 77MM/3.032" A14 PISTON 4 | + | |
| - | * 99996-H1067 RING SET FOR 99996-H1062 1 | + | |
| - | * 99996-H1022 REPLACEMENT PIN FOR 99996-H1062 4 | + | |
| - | * 99996-H1126 REPLACEMENT BUTTON FOR 99996-H1062 8 | + | |
| - | <!-- no edit --> | + | |
| - | <!-- no edit --> | + | See Main Article: [[Piston]] |
| - | COSWORTH FORGED RACING PISTONS | + | = Main Bearing Caps = |
| - | The only exception to the information provided in the above paragraph <for Arias pistons> is that the Cosworth piston still utilizes circlips to retain the full floating piston pin. | + | Also see: [[ARP]] |
| - | <!-- no edit --> | + | |
| - | PART NO. DESCRIPTION QTY REQ | + | |
| - | * 99996-H1170 76MM/2.992" A12A/A14 PISTON 4 | + | |
| - | * 99996-H1175 RING SET FOR 99996-H1170 1 | + | |
| - | <!-- End no-edit section --> | + | |
| - | === Interchange === | + | [[Block & Pan Part Numbers|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) | ||
| - | Standard Size Piston Rings - Cast Iron Rings; Bore 75mm"; 8-2.0mm Comp and 4-4.0mm Oil Rings. | + | {{UploadPost|174_5ac95f2837b42.jpg|488014}} |
| - | * SEALED POWER #E-362X.STD, 9469X. | + | |
| - | * Hastings #2M-6813 | + | |
| - | Fits: | + | |
| - | * 1979-1982 Datsun/Nissan 210 4 cyl. 1.2L 1237cc A12A engine | + | |
| - | * 1971 & Up Mazda 4 cyl. 1.5L 1484cc UA engine | + | |
| - | * 1968-1969 Toyota Corolla 4 cyl. 1.1L 1077cc KC engine | + | |
| - | * 1969-1979 Toyota Corolla 4 cyl. 1.2L 1166cc 3KC engine | + | |
| - | * 1981-1982 Toyota Starlet 4 cyl. 1.3L 1290cc 4KC engine | + | |
| - | [[Category:Engine Mechanical]] | + | [[Category:Engine Mechanical]]{{End}} |
Current revision
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 |
[edit]
Identification
A12 can be positively identified by looking for the engine Stamped ID.
See Main Article: Engine ID Mark
[edit]
Ventilation
Under the block breather pipe, this steel mesh separates out the oil vapor from crankcase ventilation air.
Part Numbers 11037-H1000ᴳ 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
H97 baffle plate
baffle plate bolts in rear portion of the engine block
日産 A型 ブロック換気バッフル
[edit]
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.
[edit]
Drain Plug
Buy at Bprojects 08931-30410 PLUG-TAPER THREAD WATER DRAIN * Fit all A-series block all years * Size: 1/4 inch NPT * Wrench Size: 14mm * Overall length: 18.5mm
[edit]
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
[edit]
Cylinder Blocks
Also see: Block Comparison
The block has ~2.5 liter coolant capacity.
[edit]
Original Block
11010-H2300 A12 BARE BLOCK 73mm/2.87" bore size * running change replaced 11010-H1000
H10 block castings
[edit]
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
[edit]
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
[edit]
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
[edit]
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
[edit]
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
[edit]
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)
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