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| Home / Car Engines / Nissan Engines / Nissan A14 |
Nissan A14 Engine Specifications
The Nissan A14 or later A14S is a 1.4 l (1,397 cc)
in-line over head valve four-cylinder 4-stroke gasoline engine from
Nissan A-family. The engine was manufactured by Nissan Motor Company
from 1975 through 2008.
The A14 engine is the most common A-series engine available in the USA,
although in some other markets it is relatively rare due to continued
use of A12 engines through 1994. It features lightweight cast-iron block
with full-opened wedge-shaped combustion chambers, aluminum head, and
fully balanced five-bearings crankshaft.
Like the previous 1974 A13, the A14 engine is a “tall-block” variant
with the block dock 15mm higher than the A12. Bore and stroke were 76.0
mm (increased from 73 mm on A12 and A13) and 77.0 mm (the same with
A13). Compression ratio rating was 8.5:1.
The A14 was produced in various ratings from 50 HP (37 kW) to 92 HP (68
kW).
In some markets, the engine was available with Hitachi Twin Carb, this
version was called A14T. The A14E engine with Electronic Port Fuel
Injection system was offered in Asian markets. Since 2002, the new A14S
has been available for Nissan commercial vehicles, like forklifts. The
Nissan Sunny B140 variation, with A14 engine, was manufactured up until
2008 by Nissan South Africa as the Nissan LDV 1400 (Light Delivery
Vehicle).
Engine code identification:
A - Engine Family
14 - 1.4 Liter Displacement
S - Carburetor type
| GENERAL TECHNICAL DATA |
Engine model ............... A14
Cylinder layout ............... Four stroke, Inline-4 (Straight-4)
Fuel type ............... Gasoline (petrol)
Production years ............... 1975-2008
Total displacement ............... 1.4L, 1,397 cc (85.24 cubic inches)
Fuel system ............... Carburetor type
Power adder ............... None
Maximum power ............... 50 HP (37 kW) at 5,000 rpm to 92 HP (68
kW) at 6,000 rpm
Maximum torque ............... No data available
Firing order ............... 1-3-4-2
Dimensions (L x W x H) ............... No data available
Weight ............... No data available
| CYLINDER BLOCK |
The engine has a cylinder block in mono-block special casting structure
with five bearing support system. The engine is provided with a baffle
plate and a steel net to reduce oil consumption. The cylinder bore is
76.0 mm (2.992 in) and the piston stroke is 77.0 mm (3.031 in).
The crankshaft is made of special forged steel and counterbalanced by
weights integrally forged with the crankshaft. The main bearings are
lubricated from oil holes which intersect the main oil gallery in
parallel with the cylinder bores.
The pistons are aluminum alloy slipper-skirts type. The motor has
two compression and single oil control ring. The piston pins are special
hollow steel types which are connected to the piston by a full floating
fit and to the connecting rods by a press fit. The connecting rods are
made of forged steel. Full pressure lubrication is directed to the
connecting rods through drilled oil passages from the adjacent main
bearings journal. Oil holes are connecting rod journals are located so
that oil is supplied to give maximum lubrication at full bearing load.
Cylinder block alloy ............... Cast iron
Compression ratio ............... 8.5:1-9.0:1 (Depends on country and
vehicle model)
Cylinder bore ............... 76.0 mm (2.992 in))
Piston stroke ............... 77.0 mm (3.031 in)
Number of piston rings (compression / oil) ............... 2 / 1
Number of main bearings ............... 5
Cylinder inner diameter (standard) ............... 76.000-76.050 mm
(2.9921-2.9941 in)
Piston skirt diameter (standard) ............... 75.967-75.017 mm
(2.9908-2.9927 in)
Piston pin outer diameter ............... 18.995-19.000 mm (0.747-0.748
in)
Piston ring side clearance ............... Top ............... 0.040 -
0.070 mm (0.0016 - 0.0028 in)
Second ............... 0.030 - 0.060 mm (0.0012 - 0.0024 in)
Oil ............... Combined
Piston ring end gap ............... Top ............... 0.20 - 0.35 mm
(0.0079 - 0.0138 in)
Second ............... 0.15 - 0.30 mm (0.0059 - 0.0118 in)
Oil ............... 0.30 - 0.90 mm (0.0118 - 0.0354 in)
Crankshaft journal diameter ............... 49.951 - 49.964 (1.9666 -
1.9671)
Crankpin diameter ............... 44.961 - 44.974 (1.7701 - 1.7706)
| CYLINDER HEAD |
The cylinder head is made of strong, light aluminum alloy which gives it
good cooling efficiency. A special aluminum bronze valve seat is used on
the intake valve, while an iron sintered alloy is used on the exhaust
valve. These parts are hot press-fitted. An air injection hole is
provided in each exhaust gas port. Intake valves are 37 mm in diameter,
and the exhaust valves are 30 mm.
The camshaft is made of special cast iron and supported by five
bearings. Camshaft bearings receive lubrication from oil holes which
intersect the main oil gallery of the cylinder block. The camshaft is
driven by the crankshaft through sprockets and a chain. The tension of
the chain is controlled by the chain tensioner which is operated with
spring and oil pressure.
The valve rocker arms are mounted on a tubular steel shaft supported on
the cylinder head by five rocker shaft brackets. Valve lifter and
pushrods are used to operate overhead rocker arms and valve from the
camshaft.
Valve Arrangement ............... OHV, chain drive
Valves ............... 8 (2 valves per cylinder)
Valve timing ............... INTAKE ............... 248 deg
EXHAUST ............... 256 deg
Valve head diameter ............... INTAKE ............... 37.0-37.2 mm
(1.457-1.465 in)
EXHAUST ............... 30.0-30.2 mm (1.181-1.189 in)
Valve length ............... INTAKE ............... 103.65-103.95 mm
(4.0807-4.0925 in)
EXHAUST
Valve stem diameter ............... INTAKE ............... 7.970-7.985
mm (0.3138-0.3144 in)
EXHAUST ............... 7.945-7.960 mm (0.3128-0.3134 in)
Valve spring free length ............... 46.5 mm (1.831)
Camshaft lobe lift ............... INTAKE ............... 5.65 mm
(0.2224 in)
EXHAUST ............... 5.92 mm (0.2331 in)
Outer camshaft journal diameter ............... №1 ...............
43.783-43.796 mm (1.7237-1.7242 in)
№2 ............... 42.283-43.296 mm (1.6647-1.7046 in)
№3 ............... 42.783-42.796 mm (1.6844-1.6849 in)
№4 ............... 42.283-42.296 mm (1.6647-1.6652 in)
№5 ............... 41.208-41.221 mm (1.6224-1.6229 in)
| MAINTENANCE DATA |
Valve clearance (Cold)
Intake valve ............... 0.25 mm (0.0098 in)
Exhaust valve
Valve clearance (Hot)
Intake valve ............... 0.35 mm (0.0138 in)
Exhaust valve
Compression pressure
Standard ............... 13.5 kg/cm2 (192 psi) / 350 rpm
Minimun ............... 12.5 kg/cm2 (178 psi) / 350 rpm
Oil system
Oil consumption , L/1000 km (qt. per miles) ............... up to 0.5 (1
qt. per 1200 miles)
Recommended engine oil ............... 5W-30, 5W-40, 10W-30, 10W-40
Engine oil capacity (Refill capacity) ............... With oil filter
3.3 l (3.5 qt.)
Without oil filter 2.8 l (3.0 qt.)
Oil change interval, km (miles) ............... 5,000-10,000
(3,000-6,000)
Oil pressure kg/cm3 (psi) ............... At idling: more then 0.8 (11)
At 3,000 rpm: 3.8 to 5.2 (54 to 74)
Ignition system
Ignition coil ............... For Canada models:
Standard: BPR5ES (NGK)
Hot type: BPR4ES (NGK)
Cold type: BPR6ES (NGK)
For USA models:
Standard: BPR5ES-11 (NGK), L46PW-11 (HITACHI)
Hot type: BPR4ES-11 (NGK), L47PW-11 (HITACHI)
Cold type: BPR6ES-11, BPR7ES-11 (NGK), L44PW-11, L45PW-11 (HITACHI)
Ignition timig B.T.D.C./rpm ............... 10 deg/700
Spark plug gap ............... 1.0 - 1.1 mm (0.039 - 0.043 in) - USA
0.8 - 0.9 mm (0.031 - 0.035 in) - Canada
TIGHTENING TORQUE SPECS
Tightening torque specs
Cylinder head bolt ............... 70-75 Nm; 7.0-7.5 kgm; 51-54 lb-ft
Rocker shaft bracket bolt ............... 20-25 Nm; 2.0-2.5 kgm; 14-18
lb-ft
Connecting rod big end nut ............... 32-38 Nm; 3.2-3.8 kgm; 23-37
lb-ft
Flywheel bolt ............... 80-90 Nm; 8.0-9.0 kgm; 58-65 lb-ft
Main bearing cap bolt ............... 50-60 Nm; 5.0-6.0 kgm; 36-43 lb-ft
Camshaft sprocket bolt ............... 40-48 Nm; 4.0-4.8 kgm; 29-35
lb-ft
Oil pan bolt ............... 15-20 Nm; 1.5-2.0 kgm; 11-14 lb-ft
Oil strainer bolt ............... 9-14 Nm; 0.9-1.4 kgm; 7-10 lb-ft
Oil pump bolt ............... 9-14 Nm; 0.9-1.4 kgm; 7-10 lb-ft
Oil pan drain plug ............... 20-30 Nm; 2.0-3.0 kgm; 14-22 lb-ft
Locating plate bolt ............... 4-5 Nm; 0.4-0.5 kgm; 3-4 lb-ft
Carbutetor nuts ............... 5-7 Nm; 0.5-0.7 kgm; 4-5 lb-ft
Manifold nuts ............... 15-20 Nm; 1.5-2.0 kgm; 11-14 lb-ft
Fuel pump nuts ............... 9-14 Nm; 0.9-1.4 kgm; 6.5-10 lb-ft
Crank pulley bolt ............... 150-200 Nm; 15-20 kgm; 108-145 lb-ft
Engine mounting bolt ............... 19-25 Nm; 1.9-2.5 kgm; 14-18 lb-ft
Water pump bolt ............... 9-14 Nm; 0.9-1.4 kgm; 6.5-10 lb-ft
Rocker pivot lock nut ............... 16-22 Nm; 1.6-2.2 kgm; 12-16 lb-ft
Timing chain cover bolt ............... 5-7 Nm; 0.5-0.7 kgm; 4-5 lb-ft
| VEHICLE APPLICATIONS |
Model ............... Years Produced
Datsun Forklift models ...............
Nissan Vanette C120 ............... 1978-1988
Nissan LDV 1400 (South Africa) ............... 2007
Nissan Stanza / Auster / Violet ............... 1977-1981
Nissan Pulsar N10 (Datsun / Nissan Cherry, Datsun 310) ...............
1977-1982
Datsun Sunny HB310 (Datsun 140Y or Datsun 210) ............... 1977-1982
Nissan Sunny B210 (140Y or B-210) ............... 1975-1978
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| Engines Technical Specifications |