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Revision as of 02:05, 7 October 2009

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.

1 Comparison
2 Part Numbers
3 Specifications
4 Fan
- 4.1 Plastic Fan
- 4.2 Electric Fan
  - 4.2.1 N10
  - 4.2.2 B310
5 Pulleys
6 Belts
7 Delete

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)

Note that the pulley bolts are wider apart in the newer pump
Newer pump has studs for the spacer
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

http://www.rockauto.com

Beck/Arnley 1310366 $34 http://partsamerica.com

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
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.
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

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