Engine block

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Category: Engine Mechanical

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Revision as of 03:44, 12 January 2007 Ddgonzal (Talk | contribs) <- Previous diff		Current revision ddgonzal (Talk | contribs) (->Drain Plug)
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-	== CYLINDER BLOCKS ==	+	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]].
-	* 11010-H2300 A12 BARE BLOCK 73mm/2.87" bore size	+
-	* 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	+
		+	= Identification =
		+	A12 can be positively identified by looking for the engine Stamped ID.
-	== CRANKSHAFTS ==	+	See Main Article: [[Engine ID Mark]]
-	* 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	+
		+	{{Album!|770}}
-	MAIN BEARING (#1/#5, SHELL THICKNESS)	+	= Ventilation =
-	<br>4 each required	+	Under the block [[Breather Tubes|breather pipe]], this steel mesh separates out the oil vapor from [[PCV|crankcase ventilation]] air.
-	* 12215-H2310 .0720"	+	<br>{{Album|27096}} {{Album|18283}}
-	* 12215-H2311 .0718"	+
-	* 12215-H2312 .0715"	+
		+	[[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
-	MAIN BEARING (#2/#4, SHELL THICKNESS)	+	= Dimensions =
-	<br>4 each 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]].
-	* 12231-H2310 .0720"	+
-	* 12231-H2311 .0718"	+
-	* 12231-12312 .0715"	+
		+	Length is the same for a A-series engine blocks.
-	MAIN BEARING (CENTER, SHELL THICKNESS)	+	{{Album|19202}}
-	<br>2 required	+
-	* 12247-H2310 .0720"	+
-	* 12247-H2311 .0718"	+
-	* 12247-H2312 .0715"	+
		+	= Drain Plug =
		+	{{AlbumC|15004|h=50|shape=27205|t=128|l=310}}
		+	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
-	== CONNECTING RODS ==	+	{{Album|28804|was=Photo\08931-30410.jpg\Datsun%201200/Parts}} {{Album|28805|was=Photo\08931-30410-.jpg\Datsun%201200/Parts}}
-	4 of each required:	+
-	* 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	+
		+	= Head Locating Dowels =
		+	Starting with A12 engine for B210 and including later 1200, dowels were used to locate the [[Cylinder Head]].
-	ROD BOLT	+	{{Photo|head_dowels.jpg}}
-	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	+
		+	11053-73400 DOWEL-BLOCK TO HEAD 14 diameter 2
-	CONNECTING ROD BEARINGS	+	= Cylinder Blocks =
-	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.	+	Also see: [[Block Comparison]]
-	8 each required:	+	The block has ~2.5 liter [[Radiator|coolant capacity]].
-	* 12111-25720 .0590"	+
-	* 12111-25721 .0588"	+
-	* 12111-25722 .0585"	+
-	* 12111-25723 .0592"	+
-	* 12111-25724 .0583"	+
-	== Pistons ==	+	{{Photo|n59975533yoshi_senna-img600x450-1211090038fvol0413765.jpg}}
-	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".	+
		+	== Original Block ==
		+	11010-H2300 A12 BARE BLOCK 73mm/2.87" bore size
		+	* running change replaced 11010-H1000
-	[[A12GX engine]] came with two kinds of pistons:	+	H10 block castings
-	* dished for low-gas (regular octane) engine	+	<br>{{Album|19179}}
-	* flat-top for high-gas (high octane) engine	+
		+	== 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)
-	A12/A13 FACTORY CAST FLAT-TOP PISTONS	+	H50 casting, from 1974-1985(?) 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|20516}}
-	* 12010-H2361 73MM/2.874" PISTON	+
		+	M79 casting, from 1985-1994 Datsun 1200
		+	<br>{{Album|21287}} {{Album|21288}}
-	PISTON RING SET	+	= Overbore =
-	* 12033-H6200 RING SET FOR 12010-H2361	+	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.
-	* 12010-12364 73.5/2.894" PISTON	+
-	* 12035-H6200 RING SET FOR 12010-H2364 1	+
-	12010-H2366 74mm/2.913" PISTON 4	+
-	y:Engi12037-H6200 RING SET FOR 12010?	+
-	H2366 1	+
-	12010-H2310 73MM/2.874" PISTON Similar to 12010-12361 except for valve reliefs	+
-	for increased piston-to-valve clearance. 4	+
-	12033-H6200 RING SET FOR 12010-	+
-	H2310	+
-	[[Category:Engine Mechanical]]	+	See main article: [[Bored And Stroked]]
-	Summary:	+
-	Summary:	+	= 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]]
		+
		+	{{Album!|15725}}
		+
		+	= 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]]
		+
		+	[[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)
		+
		+	{{UploadPost|174_5ac95f2837b42.jpg|488014}}
		+
		+	[[Category:Engine Mechanical]]{{End}}

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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 1 Identification 2 Ventilation 3 Dimensions 4 Drain Plug 5 Head Locating Dowels 6 Cylinder Blocks 6.1 Original Block 6.2 Redesigned Block 7 Overbore 8 Crankshafts 9 Connecting Rods 10 Pistons 11 Main Bearing Caps

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.
Album 27096 Album 18283

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.

Album 19202

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

Album 28804 Album 28805

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
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)

H50 casting, from 1974-1985(?) Datsun 1200
Album 20516

M79 casting, from 1985-1994 Datsun 1200
Album 21287 Album 21288

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)

Post 488014 

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