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Datsun 1200 Crankshaft Pulleys came in single- and double-belt type. There was also a triple-belt type for other A-series engines.
Contents |
Overview
PULLEY-CRANKSHAFT 12303-18002 1966-1972 [Has multiple grooves for early cover] 12303-H1001 -8109 [Has single groove for later Timing Cover] 12303-H1002 8110-8910 > 12303-H1001 12303-H8501 8910- 12303-H8500 B310.A14.S,K -7909 12303-H8501 B310.A14.S,K 7910-8010
Twin-Belt (for factory Aircon) 12303-M0110 7804-7907 12303-G1615 7908- 12303-H8900 B310 -8002 12303-H8905 B310 8003-, all A15 12303-H8905 C22 -0988 12303-G2511 C22 0988- <> 12303-G2512
Triple Belt 12303-M7061 N10.A14.POWER-STEERING 12303-G5110 C22 A/C + Power Steering
Single Belt -- Pre-1972 (multiple timing marks) Type 180 650g
Single Belt -- Post-1972 (single timing mark) Type H10 740g
Double-belt: Four kinds of front pulley: small, medium, large adjacent and & large skip
Triple-Belt C22 with power steering
Type H10 - single mark, single groove
Twin-groove pulleys
G16 - Sunny Truck from 7908
Sizes
Outside Diameter Stock A-series: 139 mm (5.4 inch) Nismo Option 1: 101 mm (4.0 inch) Nismo Option 2: 75 mm (3.0 inch) B122 aircon pulley 129 mm, 22 mm groove pitch 12303-G1615
G16
Part Numbers
Buy at Bprojects
Pulley Bolt
* 12308-H1000 WASHER-PULLEY BOLT 1 A12 - $1.29 * 12309-78200 BOLT-CRANK PULLEY 1 A12 - $5.73 M16 x 1.50 (fine) pitch * 15mm diameter * 27mm long * The head is 27mm hex and about 15 mm thick. * Torque: 15-16 kg/m (108-116 ft. lb.)
Woodruff Key
12316-30000
Fasteners -- ALL A-series * 12316-30000 KEY-WOODRUF 5X16 - $1.13two used, one for engine crankshaft pulley, one for lower timing gear Buy at Bprojects key FITS: * All A-series * J-series * E1 engine (from Datsun 320) Width: 15mm Height: 6mm Thickness: 4.8mm
Comparison: L16 key 00926-51600 5x16 Woodruff Key is NOT the same part number
Pulleys
B110 - 34.5mm OD, 0.64 in (16.2mm) ID, 8mm thick * 12303-18002 PULLEY-CRANKSHAFT -0272 A10 & early A12 engines (multiple timing marks) * 12303-H1001 PULLEY-CRANKSHAFT 0272- B110 $37.66 (single timing mark)
B210 -- all with single timing mark * 12303-H1001 PULLEY-CRANKSHAFT 0272- B210 with A13 * 12303-H5010 PULLEY-crankshaft (for cooler) B210 A12, A14 except USA (dual groove) * 12303-H7201 PULLEY-CRANKSHAFT USA B210 with A14 (dual-groove)
B310 * 12303-H1001 * 12303-H1002 * 12303-H8500 * 12303-H8501 * 12303-H8900 dual pulley * 12303-H8905 dual pulley
Underdrive Pulley
For high-RPM usage (above 8,000 RPM), move to a small diameter crankshaft pulley. This slows down the alternator and the water pump. Reducing the water pump flow is important to prevent cavitation at high speeds. And it also reduces friction, as faster spinning accessories take more power to drive.
Note that this will not prevent overcharging, as the Voltage regulator does that (if the VR is not working correctly, the alternator may overcharge even at 1100 RPM). On the contrary, a slower spinning alternator is likely to undercharge until the revs come substantially above idle.
Nissan Competition Pulley Set
Nissan Competition sold two small diameter crankshaft pulleys, which runs the accessories slower, so is suited for extra high RPM usage. For normal street use, it may run the accessories to slow for reliable usage.
Small Diameter
- 99996-H1160 SMALL DIAMETER CRANK PULLEY
- Degreed to 40 degrees and has a diameter of 101mm/4.0". Can be used with stock alternator and w/p pulleys.
Extra-Small Diameter
The pulleys below must be used as a set and require the special belt (99996-H8020) due to their unique groove design.
- 12302-H5720 [Extra] SMALL DIAMETER CRANK PULLEY
- Degreed to 45 degrees and has a diameter of 75mm/3.0"
- 21051-H5720 WATER PUMP PULLEY
- Pulley has a diameter of 100mm/3.9"
- 23151-A9960 ALTERNATOR PULLEY
- Pulley has a diameter of 90mm/3.5"
- 99996-H8020 SPECIAL BELT