![[Datsun 1200 encyclopedia]](/wiki/upload/wiki.png)
Datsun 1200 used a traditional vane-type water pump, driven by the fan belt. The same pump was used from 1966 Datsun B10 to some 1982 Datsun B310. However, air conditioning-equipped models used a different hi-performance pump, and some models used a short-shaft pump.
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Comparison
There are two basic water pumps for A-series engines:
- Datsun 1200 is long shaft, large pulley (spins slower)
- Newer is short shaft with spacer, small pully (spins faster)
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- Note that the pulley bolts are wider apart in the newer pump
- Newer pump has studs for the spacer
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- Some aftermarkets pumps have a sheet-metal impeller, smaller but more agressive
- Genuine Hitachi and Atsugi pumps (both A12 and A15) have a cast iron impeller
Part Numbers
- Beck/Arnley 1310366 $34 http://partsamerica.com
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Gasket (new and old style use same gasket)
- 21014-H1001 GASKET-WATER PUMP through 1982 model year (A12, A13, A14, A15, A12A) $4.13
- Replaced 21014-H1000, 21014-H1010
- Replaced 21014-18000 GASKET-WATER PUMP B110 (but note B10 part number)
Pump
- 21010-18003 (BA010-M6626) ASSY-PUMP WATER B110 $45.67
- 21010-18026 ASSY-PUMP WATER WITH GASKET (original PN)
- 21010-18027 ASSY-PUMP WATER WITH GASKET 0870-0871
- 21010-H1025 ASSY-PUMP WATER WITH GASKET 0971-1072 (1972 model year)
- 21010-H5025 (BA010-M6626) ASSY-PUMP WATER WITH GASKET 1172- (through 1982 model years) $45.67
- Bosch 96005 with 1.970" fan pulley bolt pattern.
OPTIONAL Aircon A14 From 0876
- 21010-H7225 (BA010-H7289) ASSY-PUMP WATER WITH GASKET From 0876 Optional A14 $57.17
- Bosch 96024 with 2.362" pulley bolt pattern
Specifications
- Casting marks: Hitachi 13 long (smooth shaft) TO
- Casting marks: Atsugi 13 short (ribbed shaft) X11 with studs
Datsun 1200 Pump vs Short Pump
- pulley flange bolt centers: 1.970" vs 2.370"
- pulley flange diameter: 2.42" vs 2.95"
- pulley flange center locating hub: 0.85" vs 1.24"
- Height of flange outer face from block: 2.38" vs 1.98"
Fan
Datsun 1000 used a metal 4-blade fan. Datsun 1200 uses a tough plastic 4-blade fan of 310 mm diameter (12.2 inch). They are strong and not known to break. Some newer A14 used the same diameter fan but with a negative offset and was used with a spacer. Most newer engines used a 330mm fan with spacer. Datsun 1200 used no spacer, but used a longer water pump. 330mm fan was Datsun 1200 OPTION FOR TROPICAL USE.
There are four Diameter of fans for RWD A-series engines:
- Lo-output engine: 310 mm diameter plastic (used on A10/A12/A13/A14/A15)
- High-output engine: 330 mm diameter plastic (also B110 OPTION)
- PB310 and HB310: 350 mm diameter - steel, 7 blades
- Electric fan: 320 mm diameter, steel 5-blade (some 1980-1982 B310s)
In USA, A/C 1200s got a flexi-fan (fibreglas blades), while B210, B310 used #2 above.
USA dealer option flex-fan
Late Model Vanette A/C Type
Nissan items, From USA catalog:
- 21060-H1001 FAN-COOLING(310 X 4) A12 (standard B110 fan) A12, A13. Also A14 GFU models, A12A, A14/A15 KFU
- 21060-H9920 FAN-COOLING(310 X 4) A15 Manual from 0180
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- 21060-A4605, 21060-N0100 FAN-COOLING D=330 FOR TROPICAL USA (330 mm diameter)
- 21060-H5700 FAN-COOLING(330 X 4) A13, A14, A15 (1974-1982)
- 21060-W5000 FAN-COOLING(350 X 7) (FOR AIR-CON) B310 A14, A15
- 21051-18000 PULLEY-FAN & WATER PUMP (D=124)(crank pulley) through 1979 (A10, A12, A13, A14, A12A)
- 21051-H9900 PULLEY-FAN & WATER PUMP (D=124) From 0879
- 11720-77701,11720-77701,11720-69901 BELT-FAN(980mm) A13 (1974), A12A (1979-1982)
- 11720-18002 BELT-FAN L=838 A12
- 11720-H9910 BELT-FAN(987) A12A Cal From 0879
Spacers
- B110 - no spacer
- 21064-H5000 SPACER-FAN A13
- 21064-H7200 SPACER-FAN A14 to 0779
- 21064-H9900 SPACER-FAN all From 0879
A12A with A/C
- 11720-H9911 BELT-FAN(977)(FOR AIR CON) OP A12 CAL from 0879
- 11721-H7210,11721-H7200 BELT-FAN(970)(FOR AIR CON) FED
A14 With A/C
- 21082-H7200 ASSY-COUPLING,FAN FOR AIR CONDITIONER A14 to 0776
- 11721-69900 BELT-FAN FOR AIR CONDITIONER(960M M)
- 21082-H7201 ASSY-COUPLING,FAN FOR AIR CONDITIONER A14 0876-up
- 11721-H7200 BELT-FAN FOR AIR CONDITIONER(970M M)
- 21082-H9920 COUPLING ASSY-FAN (FOR AIR-CON) A15 from 0180
- 21082-H9100 COUPLING ASSY-FAN (FOR AIR-CON) OP A14,A15(CAL)
- 21082-H9300 TEMP COUPLING ASSY-FAN (FOR AIR CON) OP A14,A15(FED)
Plastic Fan
310 mm Plastic fan
- 3.82 diameter center section
- 310 mm (12.2 inch) diameter blades
- 1.28" thick
- bolt pattern: 1.970"
- hub locating hole: 1.24"
310 mm fans came with these offsets:
- Shallow used with short pump: flange from back: 10mm, from front: about 1+". Requires spacer.
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- Deepdish (B110) with long pump: flange from back: 0.84" (20mm), from front: 0.35" (9mm)
- Unknown: flange from back: 5mm (reported)
Electric Fan
N10
You can fit the Datsun 310 (N10 Pulsar) fan into a 1200:
B310
The Datsun 210 (B310) "MPG" model featured an electric fan. MPG models had Manual transmission, chassis RSFU, RFN, from Sep 1980 with A14 engine w/o AC:
- HLB310RSFU
- "R" 2-dr sedan, "S" Standard model, "F" Five-speed, "U" USA Federal (non-California)
- HLB310RFN
- "R" 2-dr sedan, "F" Five-speed, "N" Canada
HL means: "H" A14 engine, "L" Left-hand-drive
Like other B310s it used a 13 psi radiator cap.
Part Numbers
From 1980-1982 B310 USA, Canada manual
- 21590-H9900 MOTOR ASSY-W/SHROUD
- fan: 320mm diameter with 5 blades
- 21595-M0206 SWITCH-THERMO
- ON: 83-87 C (181-189 F)
- OFF: 78-81 C (172-178 F)
- 05412-1600P GASKET-B
- 21596-M3000 ADAPT-THERMO SWITCH
- inline adapter, fits in lower radiator hose
Pulleys
There are at least two pulleys:
- Datsun B110: 5.05" diameter, 2.33" high, locating hub 0.85"
- Datsun B310: 4.22" diameter, 1.74" high with spacer, locating hub 1.98"
The long pump (B110) uses a fan with positive offset. The short pump (B310) uses a fan with negative offset, but with a spacer. The overall height of fan from block face is the same for both model.
- Original Style: 1.970 inch bolt centers.
- 21051-18000 PULLEY-FAN & WATER PUMP (D=124) through 1979 (A10, A12, A13, A14, A12A)
- New style: 2.362 inch bolt centers. The spacer has 1.970 holes on the fan end.
- 21051-H9900 PULLEY-FAN & WATER PUMP (D=124) From 0879
The two combos of pump/fan/spacer interchange as a whole combo. The newer type allows the fan to be unbolted while the radiator is still in the car.
Presumably the A-series moved to a small diameter pulley to increase pumping flow. But there is chance of cavitation at high speeds speed approaching 8,000 RPM.
Belts
V-belt
- NISSAN: 11720-18002 BELT-FAN L=838 (838 mm length)
- $5.99 Partsamerica.com Drive-Rite B70895
- Gates 20777
- V-belt, 29/64 inch by 33.5 inch length. About $6
- V-belt (AC models) 45 inches ~$10
Delete
Water Pump delete cover plate
