Valves

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Category: Valvetrain

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Datsun 1200 uses traditional 8mm stem diameter poppet valves.

Contents 1 Maintenance 2 Removal & Installation 3 Stem Oil Seal 4 Specifications 5 Part Numbers 6 Valve Keepers 7 Valve Guides 8 Valve Springs 9 Valve Angles 10 Others

Maintenance

See main article: Valve adjustment

Removal & Installation

1. Remove the Cylinder Head
2. Compress the valve springs and remove the keepers, then the springs
3. Slide valve out of the head
4. Coat valve mating surface with grinding compound. Slide new valve in and lap the valve. Clean the compound off.
5. If needed, remove old seals and put new seals on
6. Re-fit the valve springs

Stem Oil Seal

Specifications

Album 6691

* Intake valve head diameter: 35 mm
* Exhaust valve head diameter: 29 mm
* Stem diameter: 8 mm
* Overall length: 103.80 mm
* Seat angle: 45 degrees
* Head style: standard
* Stem end: NG

Part Numbers

* 13201-H1000 VALVE-INTAKE [35mm] 
* 13202-18000 VALVE-EXHAUST [29mm]
* 13201-H2300 VALVE-INTAKE A12GX [35mm] 
* 13202-H2300 VALVE-EXHAUST A12GX [29mm]

Valve Keepers

Album 15324

Valve Spring Retainer Keeper (Valve lock)
* Stem diameter 0.252
* 7 degree angle
* SEALED POWER Part # VK215
* BECK/ARNLEY Part # 0230045

Interchange
* 1976-1979 Buick Opel/Isuzu 1.8
* 1976-1978 Chevrolet Luv/Isuzu 1.8
* 1981-1995 Isuzu, various models
* 1988-1996 Honda/Isuzu 2.6
* Datsun A-series
* Datsun L-series 4 and 6
* Datsun Z-series

July 1972 change
Album 24388

13209-18000 RETAINER-VALVE SPRING (8) <> 13209-H2300 <>  13209-H2301 
13209-H2302 RETAINER-VALVE SPRING (8) 0772- [without O-ring grooves]
13209-H2302 RETAINER-VALVE SPRING (8) B210

13210-73400 COLLET-VALVE 1 (16) A12 (MATERIAL C40) < 13210-U0100
13210-H1000 COLLET-VALVE 1 (16) A12 0272- <> 13210-U0100
13210-U0100 COLLET-VALVE (MATERIAL C1010) B210 > 13210-73400 $1.13 USD

Valve Guides

Valve Springs

Valve Angles

SEATS

* Intake: 75° + 45° + 22.5°
  max. dia. @ 45°: 34.6mm
  contact width = 1.3mm
* Exhaust: 75° + 45°
  max. dia. @ 45°: 28.6mm
  contact width = 1.8 mm

VALVES
* Intake 30° + 45°30' backcut
* Exhaust 20° + 45°30' backcut
* Minimum valve head thickness 0.5 mm

Others

For other A-series valves (A14, etc) and for competition valves, see:

* Cylinder_Head_Identification#Valves
* Big Valves 

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