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Revision as of 19:38, 15 October 2012

The Datsun 1200's A12 engine uses a standard type oil pump. The oil should be changed every 3,000 to 5,000 miles.

Also see: Oil pressure indicator lamp: Wiring

1 Oil Temperature
2 Engine oil capacity
3 Oil Pressure Sender
- 3.1 Interchange
- 3.2 For Pressure Gauge
4 Oil Pressure Gauge
5 Oil Usage
6 Oil Specifications
7 Interchangeability
8 Part Numbers
- 8.1 USA
- 8.2 Nissan Competition Parts

Oil Temperature

Also See: Oil Pump Coolers

The oil temperature is controlled by the engine coolant temperature. As long as the engine coolant ("water") does not overheat, neither will the oil. Only a very few high performance cars have a separate oil cooler. So this means:

keep your coolant temp low, and your oil temp will be happy.

Count on the oil temp to be about 20 F degrees hotter. So here is a good street performance equation:

Thermostat: 180 F degrees
Oil temp will run about 200 F degrees

At this temperature, the good quality regular oil (inexpensive) will perform as good as the expensive synthetics in a street car. It is high temps that ruin regular oil whereas the synthetic oil can take high temps OK.

Now if you are racing or towing there is more to talk about.

Engine oil capacity

Oil pan: 2-7/8 U.S. qts., 2-3/8 Imper. qts. (2.7 L)
Oil filter: 1-1/8 U.S. pints, 1 Imper. pint. (0.54 L)

Oil Pressure Sender

Nissan part number
25240-89910 SWITCH ASSY-OIL PRESSURE $17 USD
See Switch Part Numbers

From the 1973 factory service manual:

Oil pressure at idle (650 RPM ): 13-17 psi
Regulator valve spring
- Free Length: 43.49 mm (1.71 inch)
- Pressured Length: 30.3 mm (1.19 inch)
Regulator opening pressure: 54-60 psi

Thread Size - NPT: 1/8" x 28 British Std. Pipe
 (BSPT Tapered)
Terminal Type: Bullet, Male
Operating Pressure - PSI: 3 - 9 psi

Interchange

The stock Datsun 1200 oil pressure switch fits A-series and some L-series, Z-series, E-series, Diesel and CA-series engines. Also fits certain GM, IHC and Isuzu engines.

Datsun 1200 sender uses bullet connector.

Buy at RockAuto.com

Some other Datsun senders use a spade connector

Nissan 25240-89902, 25240-89910
GM 94118755, 94312940
IHC 478097-C1
Isuzu 8-94118-755-0, 8-94312-940-0

For Pressure Gauge

Other Datsuns came with a pressure gauge, and used this switch:

Thread Size 1/8-28 ISO Tapered Thread
Switch to close at 3-10 PSI
0-2 PSI - 75 Ohms min
5.5 PSI - 44-60 Ohms
30 PSI - 27-41 Ohms
80 PSI - 7-20 Ohms

Oil Pressure Gauge

The oil pressure switch threads is 1/8 BSPT (british standard pipe tapered). It screws directly into the oil pump housing.

If you instead thread a Tee connector, you can fit both the sensor and a separate gauage. Tees are avaialable in the usual auto supply stores such as Repco or Oreillys.

Tee fitted to oil pump [Old Method, no longer recommended]

Right: this engine has the Tee (and an oil cooler)

New Method

A word of caution with this: they tend to break, perhaps due the weight of the sender at the end of the tee piece and the vibration of the engine. The solution is to use a braided hose from the oil sender hole out to the bodywork, and then mounted the tee with senders in place.

Datsun Nationals 2005 .. I think 3 different cars had their brass t-piece fail resulting in oil all over wakefield track. Definitely mount the brass fitting on the bodywork, not the engine. dattodude

Oil Usage

It is normal to add some oil between the oil changes. Usually a quart every 1,500 miles is OK. A quart every 500 miles indicates either a serious leak, or "oil burning" (bad rings) in the egine.

Oil Specifications

See Engine Oil Specifications

Interchangeability

All A-series oil pumps are interchangeable except early A10 models. New pumps work with early A10 connection rods.

connecting rod cap strengthened with 1mm longer bolt boss starting with A10-728641
Therfore, Oil pump driveshaft decreased 1.5 mm to clear the new cap design

Part Numbers

Also see: Oil Filter

USA

B110 RAW LIST
15010-H9701 ASSY-PUMP OIL WITH OUT OIL FILTER
15010-H6200 ASSY-PUMP OIL WITH OUT OIL FILTER
15010-H1000 ASSY-PUMP OIL WITH OUT OIL FILTER
15020-H1025 ASSY-SHAFT DRIVE OIL PUMP
15020-H1005 ASSY-SHAFT DRIVE OIL PUMP
15025-18003 GASKET-OIL PUMP
15132-H1000 ASSY-VALVE OIL REGULATOR
08310-53010 SET-BOLT BODY TO COVER
08915-13510 WASHER-SPRING
15066-18000 GASKET-OIL PUMP TO CYLINDER BLOCK
08915-13810 WASHER-LOCK
15036-18000 BOLT-OIL PUMP
08110-85510 BOLT
15050-H1000 ASSY-STRAINER OIL
15053-18000 GASKET-OIL STRAINER
08110-82010 BOLT
08915-13810 WASHER-LOCK

Nissan Competition Parts

LUBRICATION (A-SERIES)

15010-25720 COMPETITION OIL PUMP Generates an oil pressure of over 100psi and does not self prime
15010-M0821 COMPETITION OIL PUMP (FWD) Similar to 15010-25720 except unit is designed for FWD Datsuns with A-series engines
11710-H5720 ALTERNATOR BRACKET For use on B210 and 210 models when installing 15010-25720 oil pump
15025-25720 GASKET FOR COMPETITION OIL PUMP T= 0.10mm (Yellow)
15025-25721 GASKET FOR COMPETITION OIL PUMP T=0.12mm (Blue)
15025-25722 GASKET FOR COMPETITION OIL PUMP T = 0. 1 4mm (Green)
15010-M0821 DRY SUMP OIL PUMP Similar to 115010-25720

except has additional fittings for dry sump system

15025-H5720 GASKET FOR DRY SUMP OIL PUMP T = 0. 10mm (Yellow)
15025-H5721 GASKET FOR DRY SUMP OIL PUMP T = 0. 1 2mm (Blue)
15025-H5722 GASKET FOR DRY SUMP OIL PUMP T = 0. 14mm (Green)

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Oil pump