Nissan GA14DS

Nissan GA14DS carbureted engineThe Nissan GA14DS is an inline 1.4 liter (1392 cc) four-cylinder, four-stroke cycle carbureted gasoline engine from Nissan GA-family, utilizing cast iron for the block and aluminum alloy for the cylinder head. The engine was used on some Nissan`s mid-size models since 1990 to 1997.

It has a double overhead camshaft driving sixteen valves (two valves per cylinder). Catalyzed models were equipped with electronically controlled carburetors. A 73.6 mm (2.898 in) cylinder bore and 81.8 mm (3.220 in) piston stroke give the engine a total of 1.4 L of displacement. Compression ratio rating is 9.5:1. Redline is at 6500 rpm.

The Nissan GA14DS produces 76 PS (56 kW, 75 HP) at 6,000 rpm and 112 Nm (11.4 kg⋅m, 82.6 lb·ft) at 4,000 rpm.

The breakdown of the engine code is as follows:

  • GA – Engine Family
  • 14 – 1.4 Liter Displacement
  • D – DOHC (Dual Overhead Camshafts)
  • S – Carburetor

General information

Engine Specifications
Engine codeGA14DS
LayoutFour stroke, Inline-4 (Straight-4)
Fuel typeGasoline
Production1990-1997
Displacement1.4L, 1392 cc (84.94 cu in)
Fuel systemCarburetor
Power adderNone
Power output76 PS (56 kW, 75 HP) at 6,000 rpm
Torque output112 Nm (11.4 kg⋅m, 82.6 lb·ft) at 4,000 rpm
Firing order1-3-4-2
Dimensions (L x H x W):
Weight330 lbs (150 kg)

Cylinder block

The GA14DS has a cast-iron cylinder block, bore is 73.6 mm (2.898 in) and stroke is 81.8 mm (3.220 in). The pistons are each fitted with two compression rings and a single oil ring. The crankshaft for GA14DS engine supported by five main bearings.

Cylinder block
Cylinder block alloyCast iron
Compression ratio:9.5:1
Cylinder bore:73.6 mm (2.898 in)
Piston stroke:81.8 mm (3.220 in)
Number of piston rings (compression / oil):2 / 1
Number of main bearings:5
Block Height:213.95-214.05 mm (8.4232-8.4271 in)
Cylinder inner diameter (standard):73.600-73.610 mm (2.8976-2.8980 in)
Piston skirt diameter (standard):73.575-73.585 mm (2.8966-2.8970 in)
Piston pin outer diameter:18.989-19.001 mm (0.7476-0.7481 in)
Piston ring side clearance:Top0.040-0.080 mm (0.0016-0.0031 in)
Second0.030-0.070 mm (0.0012-0.0028 in)
Piston ring end gap:Top0.20-0.35 mm (0.0079-0.0138 in)
Second0.37-0.52 mm (0.0146-0.0205 in)
Oil0.20-0.60 mm (0.0079-0.0236 in)
Connecting rod center distance:140.45-140.55 mm (5.5295-5.5335 in)
Connectin rod small end inner diameter:19.000-19.012 mm (0.7480-0.7485 in)
Connectin rod big end inner diameter:43.000-43.013 mm (1.6929-1.6934 in)
Crankshaft journal diameter:49.956-49.964 mm (1.9668-1.9671 in)
Crankpin diameter:39.968-39.974 mm (1.5735-1.5738 in)
Crankshaft center distance:40.85-40.95 mm (1.6083-1.6122 in)

Cylinder head

The engine has an aluminum cylinder head with two chain-driven overhead camshafts. Intake valves are 29 mm in diameter, intake duration is 214° for engines with ERG system and 222° without it, and the exhaust valves are 24 mm, exhaust duration is 214° with ERG and 222° without it. The GA14DS does not have hydraulic lifters, so special shims are used to adjust the valve clearance.

Cylinder head
Cylinder head alloyAluminum
Cylinder head height:118 mm (4.6456 in)
Valve Arrangement:DOHC, chain drive
Valves:16 (4 valves per cylinder)
Intake/Exhaust duration: With EGR: 214°/214°
Without EGR: 222°/222°
Valve head diameter:INTAKE28.9-29.2 mm (1.138-1.150 in)
EXHAUST23.9-24.2 mm (0.941-0.953 in)
Valve length:INTAKE92.00-92.5 mm (3.6220-3.6417 in)
EXHAUST92.37-92.87 mm (3.6366-3.6563 in)
Valve stem diameter:INTAKE5.465-5.480 mm (0.2152-0.2157 in)
EXHAUST5.445-5.460 mm (0.2144-0.2150 in)
Cam height:INTAKE With EGR: 39.380-39.570 mm (1.5504-1.5579 in)
Without EGR: 39.880-40.070 mm (1.5701-1.5776 in)
EXHAUST With EGR: 39.380-39.570 mm (1.5504-1.5579 in)
strong>Without EGR: 39.880-40.070 mm (1.5701-1.5776 in)
Outer camshaft journal diameter:№127.935-27.955 mm (1.0998-1.1006 in)
№2-523.935-23.955 mm (0.9423 – 0.9431 in)

Head tightening procedure and torque specs:

  • Step 1: 29.4 Nm; 3.0 kg·m; 22 ft·lb
  • Step 2: 58.8 Nm; 6.0 kg·m; 43 ft·lb
  • Step 3: Loosen all bolts completely
  • Step 4: 29.4 Nm; 3.0 kg·m; 22 ft·lb
  • Step 5: Turn main bolts 50-55° or 58.8 Nm; 6.0 kg·m; 43 ft·lb

Problems and malfunctions

The Nissan GA14DS is reliable and durable, but sometimes it has a problem with the air/fuel ratio solenoid in the electronically controlled carburetor. The engine has two timing chains, their service life is about 150,000 miles of mileage (200,000-250,000 km). The valve clearance needs to be adjusted every 30,000 miles of mileage (40,000-50,000 km). The GA14DS motor life expectancy is 200,000 miles of mileage (300,000 km) or more.

Maintenance data

Valve clearance (HOT)
Intake valve0.21-0.49 mm (0.008-0.019 in)
Exhaust valve0.30-0.58 mm (0.012-0.023 in)
Compression pressure
Standard13.5 kg/cm2 (13.24 bar, 192 psi) / 350 rpm
Minimun11.5 kg/cm2 (11.28 bar, 164 psi) / 350 rpm
Compression differential limit between cylinders1 kg/cm2 (0.98 bar, 14 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
Oil type APISE, SF, SG or SH
Engine oil capacity (Refill capacity) With filter change 3.2 l (3.4 qt.)
Without filter change 2.8 l (3.0 qt.)
Oil change interval, km (miles)5,000-10,000 (3,000-6,000)
Oil Pressure, kPa (bar, kg/cm 2, psi) Idle speed: More than 59 (0.59, 0.6, 9)
2,000 rpm: More than 245 (2.45, 2.5, 36)
6,000 rpm: More than 422 (4.22, 4.3, 61)
Ignition system
Spark plug Standard: BKR5E
Spark plug gap0.8 – 0.9 mm (0.031 – 0.035 in)
Spark plug torque19.6-29.4 Nm (2.00-3.00 kg⋅m, 14.3-21.7 lb·ft)

Valve clearance adjustment data

Calculate the thickness of new adjusting shim so valve clearance comes within specified values.

R = Thickness of removed shim
N = Thickness of new shim
M = Measured valve clearance

Intake:
N = R + [M – 0.37 mm (0.0146 in)]
Exhaust:
N = R + [M – 0.40 mm (0.0157 in)]

Shims are available in 50 sizes from 2.00 mm (0.0787 in) to 2.98 mm (0.1173 in), in steps of 0.02 mm (0.0008 in).

Example (intake valve):
R = 2.10 mm
M = 0.52 mm
N = 2.10 + (0.52 – 0.37) = 2.25 mm, so we need a shim with code 225 or TS225.

For adjustingFor checking
HotCold*Hot
Intake0.32 – 0.40 (0.013 – 0.016)0.25 – 0.33 (0.010 – 0.013)0.21 – 0.49 (0.008 – 0.019)
Exhaust0.37 – 0.45 (0.015 – 0.018)0.32 – 0.40 (0.013 – 0.016)0.30 – 0.58 (0.012 – 0.023)

*: At a temperature of approximately 20°C (68°F)

Whenever valve clearances are adjusted to cold specifications, check that the clearances satisfy hot specifications and adjust again if necessary.

Vehicle applications

ModelYears Produced
Nissan Sunny N14-N13 (Greece)1990-1992
Nissan Sunny B13 (Export models)1990-1994
Nissan Sentra B13 Series JX and EX models (Philippines)1992-1995
Nissan Sentra B14 series EX models (Philippines)1996-1997
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1 Comment

  1. Good morning, Sir/madam.

    I would like to ask if you have any available of Carburetor with engine no:GA14-609578B and its chassis no:BAVALDFB14-B45223 YEAR: 1998 MODEL: SENTRA BODY TYPE: SEDAN

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