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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. | The A12 engine in the Datsun 1200 uses traditional coil springs for each valve. The [[A12GX Engine]] uses dual springs on each valve. | ||
| + | [http://datsun1200.com/modules/myalbum/photo.php?lid=504 http://datsun1200.com/uploads/thumbs/504.jpg] | ||
| = Specs and Testing = | = Specs and Testing = | ||
| + | [http://datsun1200.com/modules/myalbum/photo.php?lid=15332 http://datsun1200.com/uploads/photos/15332.jpg] | ||
| - | [http://datsun1200.com/modules/myalbum/photo.php?lid=15332 http://datsun1200.com/modules/myalbum/photos/15332.jpg] | + | * Free Length: 46.5 mm (1.831 in) |
| - | + | * Valve Closed: 38.7 mm at 23.9 kg (1.524 in at 52.7 lb) | |
| - | * Free Length: 46.5 mm (1.831 in) | + | * Valve Open: 30.2 mm at 58.5 kg (1.19 in at 129 lb) |
| - | * 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. | # 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. | ||
| - | |||
| = Part Numbers = | = Part Numbers = | ||
| - | [[Nissan Part Numbers]] | + | [[Nissan Part Numbers]] |
| - | * 13203-H1000 SPRING-valve, outer ALL except GX | + | * 13203-H1000 SPRING-valve, outer ALL except GX |
| - | * 13205-18000 SEAT-valve spring ALL except GX | + | * 13205-18000 SEAT-valve spring ALL except GX |
| - | * 13209-H2301 RETAINER-valve spring ALL | + | * 13209-H2301 RETAINER-valve spring ALL |
| - | * 13210-73400 COLLET-valve | + | * 13210-73400 COLLET-valve |
| - | * 13210-H1000 COLLET-valve (from 72-2) | + | * 13210-H1000 COLLET-valve (from 72-2) |
| - | * 13210-U0100 COLLET-valve (from 71-10) | + | * 13210-U0100 COLLET-valve (from 71-10) |
| - | ** All three collet PNs interchange | + | ** All three collet PNs interchange |
| - | * 13219-H1000 SHROUD-valve, inner ALL except GX | + | * 13219-H1000 SHROUD-valve, inner ALL except GX |
| + | |||
| + | GX-specific | ||
| + | * 13203-H2300 SPRING-valve, outer GX | ||
| + | * 13203-H2301 SPRING-valve, inner GX | ||
| + | * 13205-H2300 SEAT-valve spring GX | ||
| + | |||
| + | = Valves & Seals = | ||
| + | See main article: [[Valves]] | ||
| + | http://datsun1200.com/uploads/thumbs/1501.jpg http://datsun1200.com/uploads/thumbs/23355.jpg http://datsun1200.com/uploads/thumbs/23353.jpg | ||
| - | GX-specific | + | = Photo Index = |
| - | * 13203-H2300 SPRING-valve, outer GX | + | [http://datsun1200.com/modules/myalbum/photo.php?lid=17613 http://datsun1200.com/uploads/thumbs/17613.jpg] |
| - | * 13203-H2301 SPRING-valve, inner GX | + | [http://datsun1200.com/modules/myalbum/photo.php?lid=17640 http://datsun1200.com/uploads/thumbs/17640.jpg] |
| - | * 13205-H2300 SEAT-valve spring GX | + | |
| - | * 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) | + | |
| + | [http://datsun1200.com/modules/myalbum/photo.php?lid=18258 http://datsun1200.com/uploads/thumbs/18258.jpg] | ||
| + | [http://datsun1200.com/modules/myalbum/photo.php?lid=18703 http://datsun1200.com/uploads/thumbs/18703.jpg] | ||
| + | [http://datsun1200.com/modules/myalbum/photo.php?lid=19821 http://datsun1200.com/uploads/thumbs/19821.jpg] | ||
| + | [http://datsun1200.com/modules/myalbum/photo.php?lid=20353 http://datsun1200.com/uploads/thumbs/20353.jpg] | ||
| + | [http://datsun1200.com/modules/myalbum/photo.php?lid=20747 http://datsun1200.com/uploads/thumbs/20747.jpg] | ||
| + | [http://datsun1200.com/modules/myalbum/photo.php?lid=21686 http://datsun1200.com/uploads/thumbs/21686.jpg] | ||
| + | [http://datsun1200.com/modules/myalbum/photo.php?lid=21687 http://datsun1200.com/uploads/thumbs/21687.jpg] | ||
| + | [http://datsun1200.com/modules/myalbum/photo.php?lid=23378 http://datsun1200.com/uploads/thumbs/23378.jpg] | ||
| + | [http://datsun1200.com/modules/myalbum/photo.php?lid=23647 http://datsun1200.com/uploads/thumbs/23647.jpg] | ||
| + | [http://datsun1200.com/modules/myalbum/photo.php?lid=23648 http://datsun1200.com/uploads/thumbs/23648.jpg] | ||
| + | [http://datsun1200.com/modules/myalbum/photo.php?lid=23649 http://datsun1200.com/uploads/thumbs/23649.jpg] | ||
| + | [http://datsun1200.com/modules/myalbum/photo.php?lid=23734 http://datsun1200.com/uploads/thumbs/23734.jpg] | ||
| - | [[Category:Engine Mechanical]] | + | [[Category:Valvetrain]] |
Revision as of 03:20, 11 April 2013
The A12 engine in the Datsun 1200 uses traditional coil springs for each valve. The A12GX Engine uses dual springs on each valve.
Contents |
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
Nissan Part Numbers * 13203-H1000 SPRING-valve, outer ALL except GX * 13205-18000 SEAT-valve spring ALL except 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 * 13219-H1000 SHROUD-valve, inner ALL except GX
GX-specific * 13203-H2300 SPRING-valve, outer GX * 13203-H2301 SPRING-valve, inner GX * 13205-H2300 SEAT-valve spring GX
Valves & Seals
See main article: Valves
Photo Index
