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Revision as of 06:27, 13 April 2014 ddgonzal (Talk | contribs) (->Part Numbers) Next diff -> |
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| 13042-18000 SEAL-OIL CRANKSHAFT FRONT 1 A12 - superceded | 13042-18000 SEAL-OIL CRANKSHAFT FRONT 1 A12 - superceded | ||
| 13510-H1000 SEAL-OIL CRANKSHAFT FRONT (NOK) 1 A12 0271- 2 13042-18000 $7.24 | 13510-H1000 SEAL-OIL CRANKSHAFT FRONT (NOK) 1 A12 0271- 2 13042-18000 $7.24 | ||
| + | [http://www.rockauto.com/catalog/x,carcode,1208483,parttype,5604 RockAuto] | ||
| + | * National 223830 | ||
| + | * Beck/Arnley 0521989 | ||
| + | Specs | ||
| + | * Shaft size: 38 mm | ||
| + | * Housing bore: 55 mm | ||
| + | * Outer diameter: 55.3 mm | ||
| + | * Width: 7 mm | ||
| SEAL, Rear | SEAL, Rear | ||
| 12279-18000 SEAL-OIL CRANKSHAFT REAR 1 A12 - $81.18 | 12279-18000 SEAL-OIL CRANKSHAFT REAR 1 A12 - $81.18 | ||
| 12279-18010 SEAL-OIL CRANKSHAFT REAR (NDK) 1 A12 0271- 2 12279-18000 NLA | 12279-18010 SEAL-OIL CRANKSHAFT REAR (NDK) 1 A12 0271- 2 12279-18000 NLA | ||
| - | 12279-H2301 | + | 12279-H2301 |
| * supercedes 12279-H1000 SEAL-OIL CRANKSHAFT REAR (NOK) 1 A12 0271- $81.18 | * supercedes 12279-H1000 SEAL-OIL CRANKSHAFT REAR (NOK) 1 A12 0271- $81.18 | ||
| + | 12279-H2311 NDK make | ||
| + | |||
| + | 12279-H2301 is for all A12/A14/A14 engines. | ||
| + | Seal specifications | ||
| + | * Shaft Size 60 mm | ||
| + | * Housing Bore 82 mm | ||
| + | * Outer Diameter 82.2 mm | ||
| + | * Width 12 mm | ||
| + | [http://www.rockauto.com/catalog/x,carcode,1208483,parttype,5604 aftermarket RockAuto] | ||
| + | * Fel-Pro BS27493 | ||
| + | * National 712006 | ||
| + | * Corteco/Detroit Gasket 17209 | ||
| PILOT BUSHING | PILOT BUSHING | ||
Revision as of 06:27, 13 April 2014
The crankshaft is interchangeable between early A12, A12GX, late A12, late A13 and A12A. Only the flywheel bolts differ, after 1974 using metric bolts.
Contents |
Overview
Stroke comes in four sizes:
- 70mm (2.76 in.) stroke: A12/A12A/A13(1980)
- 77mm (3.03 in.) stroke: A13(1974)/A14
- 82mm (3.23 in.) stroke: A15
Flywheel Bolts
- 1966-1973: crank uses english-system 3/8" x 24 UNF bolts
- 12315-18000 BOLT-flywheel & drive plate 6 A10
- 12315-H1001 BOLT-FLY WHEEL 6 A12 MANUAL
- Will ARP 206-2802 work? For BMC A-series engines (UHL Under Head Length 0.900") $18 USD/set of 6
- 1974-up: crank uses Metric M10 1.25 bolts (from '73-7)
- A12,A13,A14,A12A,A15
- 12315-H6900 BOLT-FLYWHEEL 6 $4.83 USD
- replaced 12315-H6200
- Will ARP 203-2802 work? For 4AGE engines (UHL Under Head Length 1.050") $22 USD/set of 8
Misc
Also see: Bored And Stroked for crankshaft modifications you can perform at home.
Apparently there are two forgings of crankshaft:
- Heavy duty
- Light weight: thinner straight sided counterweights that also have small scollops out of them. This may be the Datsun Competition crank.
- Twin-carb engine (A12GX, A12T and A14T) crankshafts are the same as a standard engines.
- 1974-up cranks use metric flywheel bolts. Early engines used British threads. See A Engine Redesign
- Front bolt, that holds the front pulley on, is:
- Part Number: 12309-78200 ($4.58)
- M16 x 1.50 (fine) pitch
- 15mm diameter
- 27mm long
- The head is ?mm hex and about 15 mm thick.
- Torque specification: 15-16 kg/m (108-116 ft. lb.)
Identification
- A12
-
- A13 low deck, 70mm 9.51 kg scalloped crank throws
-
- A14, scalloped crank throws (H8940)
-
- A14
-
Crankshaft Pulley
Lightened Crankshaft
Discussion: JTS Cranks
Seals
Rear Main Seal
Installation
12279-H2301 Rear Main Seal
Also apply sealant here
Removal
- Remove oil pan
- Remove rear main bearing
- Lift out old seal
If replacing the rear main seal when changing a clutch, you may remove it with the oil pan still in place:
- Puncture seal with an awl, tiny screwdriver, or similar implement. Punch through the eddge of the seal, by gently tapping through with hammer
- Carefully pry out slightly and work your way around the circumference until free
Part Numbers
12200-H8500 CRANKSHAFT ASSY B310 A12S, A13S 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 * Weight 26.2 lbs 12200-G3400 A15 CRANKSHAFT 82mm/3.23" stroke
Old Numbers: 12200-H1000 ASSY-CRANKSHAFT 1 A12 MANUAL - $624.02 12200-H1001 CRANKSHAFT 1 A12 -671 12 12200-H1000 superceded 12200-H1000 CRANKSHAFT 1 A12 0671- 2 12200-H1001 superceded 12200-H5000 CRANKSHAFT 1 A12 0572- 2 12200-H1000 $624.02
BEARINGS * See main article: Bearings
SEAL, Front 13042-18000 SEAL-OIL CRANKSHAFT FRONT 1 A12 - superceded 13510-H1000 SEAL-OIL CRANKSHAFT FRONT (NOK) 1 A12 0271- 2 13042-18000 $7.24 RockAuto * National 223830 * Beck/Arnley 0521989 Specs * Shaft size: 38 mm * Housing bore: 55 mm * Outer diameter: 55.3 mm * Width: 7 mm
SEAL, Rear 12279-18000 SEAL-OIL CRANKSHAFT REAR 1 A12 - $81.18 12279-18010 SEAL-OIL CRANKSHAFT REAR (NDK) 1 A12 0271- 2 12279-18000 NLA 12279-H2301 * supercedes 12279-H1000 SEAL-OIL CRANKSHAFT REAR (NOK) 1 A12 0271- $81.18 12279-H2311 NDK make
12279-H2301 is for all A12/A14/A14 engines. Seal specifications * Shaft Size 60 mm * Housing Bore 82 mm * Outer Diameter 82.2 mm * Width 12 mm aftermarket RockAuto * Fel-Pro BS27493 * National 712006 * Corteco/Detroit Gasket 17209
PILOT BUSHING * see Pilot Bushing
SLINGER 12302-18000 THROWER-OIL CRANKSHAFT 1 A12 - $1.57
FLYWHEEL BOLTS 12315-H1001 BOLT-FLY WHEEL 6 A12 MANUAL - $4.38 12315-H1000 BOLT-FLY WHEEL 6 A12 AUTOMATIC - $3.51 12330-20300 PILOT-CONVERTER 1 A12 AUTOMATIC - $18.66 12333-20300 PLATE-CRANK CONVERTER 1 A12 AUTOMATIC - $9.44