Fan

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The engine cooling fan is attached to the water pump. Datsun 1200 uses a tough plastic 4-blade fan of 310 mm diameter (12.2 inch), which 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. Datsun 1200 used no spacer, but used a longer water pump. Some newer A-series engines used a 330mm fan with spacer. 330mm fan was Datsun 1200 OPTION FOR TROPICAL USE. Datsun 1000 used a metal 4-blade fan.

Overview

Album 20435

Pulley ratio: 1.08
* Fan pulley: 129 mm
* Crankshaft Pulley: 139 mm

USA dealer option flex-fan
Album 842

Comparison

There are five diameter of fans for RWD A-series engines:

1. Small steel fan: 280 mm metal 4-blade used on Datsun 1000
2. #Plastic Fan: 310 mm diameter plastic (used on A10/A12/A13/A14/A15)
3. High-output engine: 330 mm diameter plastic (also B110 OPTION)
4. #Electric Fan: 320 mm diameter, steel 5-blade (some 1980-1982 B310s)
5. #Thermo Fan: B310 OPTION and PB310 (A15): 350 mm diameter , 7 blades

In USA, A/C 1200s got a flexi-fan (fibreglas blades), while B210/B310 used #2 above.

Generic metal blade fan (holes slotted for different engines)
Album 14837

Plastic Fan

Datsun B110 standard specification は標準仕様 is a tough plastic 4-blade 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"
* Bolts: (4) 10mm hex head, M8? threads

Early B110 used regular lock washers, later ones use metal strips and bent the up to lock the bolts.

310 mm fans came with these offsets:
Album 20442

Shallow Fan used with H72 short pump: flange from back: 10mm, from front: about 1+". Requires spacer
Album 20401 Album 14808

Unknown Fan: flange from back: 5mm (reported)

Deep Dish Fan (B110) used with H10 long pump: flange from back: 0.84" (20mm), from front: 0.35" (9mm)
Album 18225 Album 20400

Thermo Fan

Newer A-series engines (B310, C22, etc) -- especially those with aircon -- use a thermostatically controlled clutch fan.

Album 27154

350 mm diameter 21060-W5000ᴳ < 21060-W500A
7 blades
* Datsun B310 OPTION
* Nissan C22 Vanette A15
* Nissan C23 Serena LD23 diesel
bolts to: Thermo clutch

B310 with aircon and PB310 (A15)
Album 22120 Album 22121

Thermo fan uses the short H72 water pump with no spacer
Album 26418

Late Model Vanette A/C Type
Album 3151 Album 6163

Electric Fan

Part Numbers

Nissan items, From USA catalogs:
21060-H1001 FAN-COOLING(310 X 4)
* A12 [standard B110 fan]
* B210 A13 (1974)
* B210 A14 GFU models
* B310 A12A, A14/A15 KFU
21060-H9920 FAN-COOLING(310 X 4) A15 Manual from 0180
Album 14463
21060-A4605 FAN-COOLING D=330 FOR TROPICAL USA (330 mm diameter) OP CRANK > 21060-N0100
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, OPTION JAP.A12

Spacer/Adapters
B110 - no spacer
21064-H5000 SPACER-FAN A13 [looks to be a thin spacer]
21064-H7200 SPACER-FAN A14 to 0779 [thin spacer]
21064-H9900 SPACER-FAN all From 0879 [thick spacer adapter]
NOTE: HB210 used B110 pulley but with thin spacer

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)