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= Overview = | = Overview = | ||
Datsun dual springs are installed a [[A14E_Service_Manual_Part_2#132|special direction]] | Datsun dual springs are installed a [[A14E_Service_Manual_Part_2#132|special direction]] | ||
- | <br><img size=400>http://i297.photobucket.com/albums/mm219/ddgonzal/A14E/132d.jpg</img> | + | <br>{{Photo!|132d.jpg|A14E}} |
{{Album|504}} | {{Album|504}} | ||
= Specs and Testing = | = Specs and Testing = | ||
- | [http://datsun1200.com/modules/myalbum/photo.php?lid=15332 http://datsun1200.com/uploads/photos/15332.jpg] | + | {{Album|15332}} |
* Free Length: 46.5 mm (1.831 in) | * Free Length: 46.5 mm (1.831 in) | ||
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* 13203-H2301 SPRING-valve, inner GX | * 13203-H2301 SPRING-valve, inner GX | ||
* 13205-H2300 SEAT-valve spring GX | * 13205-H2300 SEAT-valve spring GX | ||
- | [http://datsun1200.com/modules/newbb/viewtopic.php?post_id=474291#forumpost474291 http://datsun1200.com/uploads/newbb/174_5666a42e95c11.jpg] | + | {{UploadPost|174_5666a42e95c11.jpg|474291}} |
= Valves & Seals = | = Valves & Seals = | ||
See main article: [[Valves]] | See main article: [[Valves]] | ||
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= Racing Valve Springs = | = Racing Valve Springs = | ||
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= Photo Index = | = Photo Index = | ||
- | [http://datsun1200.com/modules/myalbum/photo.php?lid=17613 http://datsun1200.com/uploads/thumbs/17613.jpg] | + | {{Indexi!}}<div class="index_body">{{Thumbi|17613}} {{Thumbi|17640}} {{Thumbi|18258}} {{Thumbi|18703}} {{Thumbi|19821}} {{Thumbi|20353}} {{Thumbi|20747}} {{Thumbi|21686}} {{Thumbi|21687}} {{Thumbi|23378}} {{Thumbi|23647}} {{Thumbi|23648}} {{Thumbi|23649}} {{Thumbi|23734}}</div> |
- | [http://datsun1200.com/modules/myalbum/photo.php?lid=17640 http://datsun1200.com/uploads/thumbs/17640.jpg] | + | |
- | [http://datsun1200.com/modules/myalbum/photo.php?lid=18258 http://datsun1200.com/uploads/thumbs/18258.jpg] | + | [[Category:Valvetrain]]{{End}} |
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- | [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] | + | |
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- | [[Category:Valvetrain]] | + |
Revision as of 06:29, 31 August 2017
The A12 engine in the Datsun 1200 uses traditional coil springs for each valve. The A12GX Engine uses dual springs on each valve.
Contents |
Overview
Datsun dual springs are installed a special direction
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 excess deflection must be replaced.
* Squareness deformation limit: 1.6 mm (1.3 for dual springs)
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 [all after 1973] * 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
Racing Valve Springs
For RPMs in excess of stock (higher than 6400 RPM) use racing valve springs
- Stock springs are redlined at 6400 rpm, and will often go to 6800 RPM
- Factory GX springs are good to about 7500 rpm (higher than the points distributor will rev)
- Tomei
- Iskenderian 455-JA-006 needs dual spring retainers, MAX RPM 10,000
Toyota Dyna inner valve springs
L14 dual valve springs L-series is slightly taller, and compresses slightly more * L-series 1.98" free length, 1.524" at 52.7 lb * A-series 1.83" free length, 1.575" at 46.9 lb
Holden Six dual valve springs
ISKY 455-D/JA-006 MAX RPM 10,000 Outer 455-D O.D. 1.210" I.D. .925" Inner JA-006 I.D. .635" Spring rate 225 Coil bind .850" installed height 1.500" Max net valve lift .450" 1.500" 79 lbs 1.200" 145 lbs
Photo Index
Click any thumbnail to see it full size in our Club Photo Album. Read details or post a comment!¤