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| + | The A12 engine in the Datsun 1200 uses traditional coil springs for each valve. The [[A12GX Engine]] uses dual springs on each valve. | ||
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| + | = Specs and Testing = | ||
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| [http://datsun1200.com/modules/myalbum/photo.php?lid=15332 http://datsun1200.com/modules/myalbum/photos/15332.jpg] | [http://datsun1200.com/modules/myalbum/photo.php?lid=15332 http://datsun1200.com/modules/myalbum/photos/15332.jpg] | ||
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| # Measure the free length and the tension of each spring. If the measured value exceeds the specified limit, replace the spring. | # Measure the free length and the tension of each spring. If the measured value exceeds the specified limit, replace the spring. | ||
| # Check each spring for deformation with a square. Any springs with a deflection of 1.6 mm (0.0630 in) or more must be replaced. | # Check each spring for deformation with a square. Any springs with a deflection of 1.6 mm (0.0630 in) or more must be replaced. | ||
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| + | = Part Numbers = | ||
| + | [[Nissan Part Numbers]] | ||
| + | * 13203-H1000 SPRING-valve, outer ALL except GX | ||
| + | * 13203-H2300 SPRING-valve, outer GX | ||
| + | * 13203-H2301 SPRING-valve, inner GX | ||
| + | * 13205-18000 SEAT-valve spring ALL except GX | ||
| + | * 13205-H2300 SEAT-valve spring GX | ||
| + | * 13209-H2301 RETAINER-valve spring ALL | ||
| + | * 13210-73400 COLLET-valve | ||
| + | * 13210-H1000 COLLET-valve (from 72-2) | ||
| + | * 13210-U0100 COLLET-valve (from 71-10) | ||
| + | ** All three collet PNs interchange | ||
| + | * 13207-H2300 SEAL-oil, valve GX superceded | ||
| + | * 13207-H2301 SEAL-oil, valve GX (from 72-7) | ||
| + | * 13207-H2310 SEAL-oil, valve GX (from 72-10) | ||
| + | * 13219-H1000 SHROUD-valve, inner ALL except GX | ||
| [[Category:Engine Mechanical]] | [[Category:Engine Mechanical]] | ||
Revision as of 07:23, 6 February 2008
The A12 engine in the Datsun 1200 uses traditional coil springs for each valve. The A12GX Engine uses dual springs on each valve.
Specs and Testing
- Free Length: 46.5 mm (1.831 in)
- Valve Closed: 38.7 mm at 23.9 kg (1.524 in at 52.7 lb)
- Valve Open: 30.2 mm at 58.5 kg (1.19 in at 129 lb)
- Measure the free length and the tension of each spring. If the measured value exceeds the specified limit, replace the spring.
- Check each spring for deformation with a square. Any springs with a deflection of 1.6 mm (0.0630 in) or more must be replaced.
Part Numbers
- 13203-H1000 SPRING-valve, outer ALL except GX
- 13203-H2300 SPRING-valve, outer GX
- 13203-H2301 SPRING-valve, inner GX
- 13205-18000 SEAT-valve spring ALL except GX
- 13205-H2300 SEAT-valve spring GX
- 13209-H2301 RETAINER-valve spring ALL
- 13210-73400 COLLET-valve
- 13210-H1000 COLLET-valve (from 72-2)
- 13210-U0100 COLLET-valve (from 71-10)
- All three collet PNs interchange
- 13207-H2300 SEAL-oil, valve GX superceded
- 13207-H2301 SEAL-oil, valve GX (from 72-7)
- 13207-H2310 SEAL-oil, valve GX (from 72-10)
- 13219-H1000 SHROUD-valve, inner ALL except GX