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| - | The A12 engine of the Datsun 1200 features a modern lightweight cast-iron cylinder block. | + | 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]]. |
| - | Also see [[Block Comparison]] | + | = Identification = |
| + | A12 can be positively identified by looking for the engine Stamped ID. | ||
| - | == Identification == | + | See Main Article: [[Engine ID Mark]] |
| - | A12 - see main article: [[Engine ID Mark]] | + | |
| - | http://datsun1200.com/modules/myalbum/photos/thumbs/770.jpg | + | {{Album!|770}} |
| - | == Ventilation == | + | = Ventilation = |
| - | [http://datsun1200.com/modules/myalbum/photo.php?lid=18283 http://datsun1200.com/uploads/photos/18283.jpg] | + | 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}} | ||
| - | Under the block breather pipe, this steel mesh separates out the oil vapor from [[PCV|crankcase ventilation]] air. | + | [[Block_%26_Pan_Part_Numbers|Part Numbers]] |
| + | {{searchPart|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 | ||
| - | [http://i1085.photobucket.com/albums/j434/Daisblade/510%20waGoon/IMAG0845_zps9096b993.jpg http://i1085.photobucket.com/albums/j434/Daisblade/510%20waGoon/th_IMAG0845_zps9096b993.jpg] [http://i1085.photobucket.com/albums/j434/Daisblade/510%20waGoon/IMAG0847_zps903d3fb8.jpg http://i1085.photobucket.com/albums/j434/Daisblade/510%20waGoon/th_IMAG0847_zps903d3fb8.jpg] | + | H97 baffle plate |
| + | <br>{{Album|30364}} | ||
| - | == Block Height == | + | baffle plate bolts in rear portion of the engine block |
| - | A10 Deck Height: 179.1mm | + | <br>{{UploadPost|174_67b163d1d47cf.jpg|498788}} |
| - | A12/A12A Deck Height: 189.1mm | + | |
| - | A14/A15 Deck Height: A12 height 204.1mm | + | |
| - | == Cylinder Blocks == | + | 日産 A型 ブロック換気バッフル |
| - | A12 Deck Height: 189.1mm (?) | + | |
| - | ~2.5 liter coolant capacity | + | = 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]]. | ||
| - | The A10 block is 10mm shorter than A12 block, while A14/A15 block is 15mm taller than A12 block. Length is the same for a A-series engine blocks. | + | Length is the same for a A-series engine blocks. |
| - | <br>[http://datsun1200.com/modules/myalbum/photo.php?lid=19202 http://datsun1200.com/uploads/thumbs/19202.jpg] | + | |
| + | {{Album|19202}} | ||
| - | Also see: [[Block Comparison]] | + | = Drain Plug = |
| + | {{AlbumC|15004|h=50|shape=27205|t=128|l=310}} | ||
| - | === Original Block === | + | Buy at [http://www.datsun1200.asia/category/select/pid/9244 Bprojects] |
| - | <br>H10 or M08 block castings | + | [[Block & Pan Part Numbers|08931-30410]] PLUG-TAPER THREAD WATER DRAIN |
| - | <br>[http://datsun1200.com/modules/myalbum/photo.php?lid=19179 http://datsun1200.com/modules/myalbum/photos/thumbs/19179.jpg] | + | * Fit all A-series block all years |
| - | <br>* 11010-H2300 A12 BARE BLOCK 73mm/2.87" bore size | + | * Size: 1/4 inch NPT |
| + | * Wrench Size: 14mm | ||
| + | * Overall length: 18.5mm | ||
| - | === Redesigned Block === | + | {{Album|28804|was=Photo\08931-30410.jpg\Datsun%201200/Parts}} {{Album|28805|was=Photo\08931-30410-.jpg\Datsun%201200/Parts}} |
| - | * 11010-H5000 A12 73mm bore size | + | |
| - | * 11010-G1600 A12 From June 1975 (?) | + | |
| - | * 11010-G1618 A12 B120 7908-8503 | + | |
| - | * 11010-G1619 A12 B120 8504- | + | |
| - | *: 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 | + | = Head Locating Dowels = |
| - | <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] | + | Starting with A12 engine for B210 and including later 1200, dowels were used to locate the [[Cylinder Head]]. |
| - | === Tall Block === | + | {{Photo|head_dowels.jpg}} |
| - | Deck height: 204.1mm (?), or 15mm taller than an A12/A12A block. Length is the same. | + | |
| - | * 11010-H6200 [1974] A13 BARE BLOCK 73mm/2.87" bore size | + | 11053-73400 DOWEL-BLOCK TO HEAD 14 diameter 2 |
| - | * A14 cast "A14" above fuel pump | + | |
| - | ** H72 or G30 | + | |
| - | * 11010-H9700 A14/A15 BARE BLOCK 76mm/2.99" bore size | + | |
| - | ** G34 | + | |
| - | *: [http://datsun1200.com/modules/myalbum/photo.php?lid=20446 http://datsun1200.com/uploads/thumbs/20446.jpg] [http://datsun1200.com/modules/myalbum/photo.php?lid=20447 http://datsun1200.com/uploads/thumbs/20447.jpg] [http://datsun1200.com/modules/myalbum/photo.php?lid=20444 http://datsun1200.com/uploads/thumbs/20444.jpg] | + | |
| - | === Overbore === | + | = Cylinder Blocks = |
| - | The 1971-1973 A12, the one with the front distributor, can usually be bored to 76mm. This is the same as a stock A14. There are probably some dud blocks around, but generally 76mm is fine. Pistons of 76.5 mm size and larger were offered through the Datsun competition department and others back in the 70's, so it's a factory approved bore size. | + | Also see: [[Block Comparison]] |
| - | A14 pistons use a 19mm wrist pin while the A12 rods have a 17.5mm hole, so you have choices: | + | The block has ~2.5 liter [[Radiator|coolant capacity]]. |
| - | * Bore the original rod to 19mm. This is most commonly done | + | |
| - | * Find a set of late A12 rods. There seems to have been a change in the later rods and these forgings look like they are the ones that were used for the A12A & A13 engines. [more on this later]. These rods have more 'meat' around the pin hole & would be stronger than a 1200 rod after the pin hole was bored to 19mm. | + | |
| - | * Find a set of A12A or 1980's A13 rods as these have the right length and the correct wrist pin hole for the A14 pins | + | |
| + | {{Photo|n59975533yoshi_senna-img600x450-1211090038fvol0413765.jpg}} | ||
| - | 73mm bore piston used the 17.5mm piston pin diameter: | + | == Original Block == |
| - | * A10 | + | 11010-H2300 A12 BARE BLOCK 73mm/2.87" bore size |
| - | * 1971-1973 A12 (1200) | + | * running change replaced 11010-H1000 |
| - | * 1974-up A12 | + | |
| - | * 1974 A13 (tall block engine) | + | |
| - | A series pistons for engines with 75mm bore used a 19mm pin: | + | H10 block castings |
| - | * A12A - USA & Japan only | + | <br>{{Album|19179}} |
| - | 76mm bore size also used the 19mm pin: | + | == Redesigned Block == |
| - | * A14 | + | * 11010-H5000 A12 [[B120]] From July 1973 (?) |
| - | * A15 | + | * 11010-G1600 A12 B120 From June 1975 (?) |
| - | * 1979-'81 (Asia only) | + | * 11010-G1618 A12 B120 7908-8503 |
| + | * 11010-G1619 A12 B120 8504- (M79 casting) | ||
| - | A12A and late A13s were just bored out A12s, so they had the shorter A12 length rods, but with the bigger pin size. The crankshaft is interchangeable between early A12, late A12, late A13 and A12A. | + | H50 casting, from 1974-1985(?) Datsun 1200 |
| + | <br>{{Album|20516}} | ||
| - | == Crankshafts == | + | M79 casting, from 1985-1994 Datsun 1200 |
| + | <br>{{Album|21287}} {{Album|21288}} | ||
| - | Stroke: | + | = Overbore = |
| - | * 70mm (2.76 in.) stroke: A12/A12A/A13(1980) | + | 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. |
| - | * 77mm (3.03 in.) stroke: A13(1974)/A14 | + | |
| - | * 82mm (3.23 in.) stroke: A15 | + | |
| - | For more details and part numbers, see [[Crankshaft]] | + | See main article: [[Bored And Stroked]] |
| - | == Connecting Rods == | + | = Crankshafts = |
| - | [http://datsun1200.com/modules/myalbum/photo.php?lid=2326 http://datsun1200.com/modules/myalbum/photos/thumbs/15725.jpg] | + | A12 uses a forged crankshaft, so it is plenty strong -- even for 8500 RPM use. |
| - | 4 of each required: (measurement is center-to-center) | + | Stroke: 70mm (2.76 in.) |
| - | * 117.5 mm 12100-18000 A10 ASS'Y-ROD, connecting | + | |
| - | * 121.5 mm 12100-H1000 A12 CONNECTING ROD [19 mm piston pin] | + | |
| - | * 121.5 mm 12100-18500 A12A CONNECTING ROD [20 mm piston pin] | + | |
| - | * 133.0 mm 12100-16200 [[A13]] (1974) CONNECTING ROD | + | |
| - | * 133.0 mm 12100-17200 A14/A15 CONNECTING ROD | + | |
| - | The weights of the 4 stock A15 rods with ARP rod bolts and nuts installed, no bearings is: 514.00 to 511.81 grams. | + | For more details and part numbers, see [[Crankshaft]] |
| - | === Bearings === | + | = Connecting Rods = |
| - | See main article: [[Bearings]] | + | 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. |
| - | === Rod Studs === | + | See main article: [[Connecting Rods]] |
| - | The same rod studs are used by all A-series engines, from A12 to A15. | + | |
| - | 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: | + | {{Album!|15725}} |
| - | * 12109-H1001 CONNECTING ROD BOLT TOKYO RASI $3.63 USD | + | |
| - | ** superceded 12109-18000 BOLT-connecting rod | + | |
| - | * 12109-H1011 CONNECTING ROD BOLT TOKYO SEATI | + | |
| - | ** alternate supplier | + | |
| - | *: [http://datsun1200.com/modules/myalbum/photo.php?lid=22788 http://datsun1200.com/uploads/thumbs/22788.jpg] | + | |
| - | * 12112-H1000 NUT-HEX CONNECTING ROD $1.47 USD | + | = Pistons = |
| - | ** superceeded 12112-18000 or 89-11238 | + | 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. |
| - | *: [http://datsun1200.com/modules/myalbum/photo.php?lid=22789 http://datsun1200.com/uploads/thumbs/22789.jpg] | + | |
| - | ARP Brand connecting rod stud set | + | See Main Article: [[Piston]] |
| - | * 102-6002 about $60 USD [compared to about $32 from Nissan] | + | |
| - | *: [http://datsun1200.com/modules/myalbum/photo.php?lid=20419 http://datsun1200.com/uploads/thumbs/20419.jpg] | + | |
| - | == Weight == | + | = Main Bearing Caps = |
| - | For maximum performance, use the lightest rod that will hold up to the intended usage. 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. | + | Also see: [[ARP]] |
| - | + | ||
| - | + | ||
| - | For road racing engines with sustained high-RPM loads, a heavier duty rod may be required. | + | |
| - | + | ||
| - | + | ||
| - | The weight of a stock A15 rod with ARP rod bolts and nuts installed, no bearings is: | + | |
| - | + | ||
| - | Approximately 514 grams | + | |
| - | + | ||
| - | == 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. | + | |
| + | [[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) | ||
| - | See main article: [[Piston]] | + | {{UploadPost|174_5ac95f2837b42.jpg|488014}} |
| - | [[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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