The 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 code | GA14DS |
| Layout | Four stroke, Inline-4 (Straight-4) |
| Fuel type | Gasoline |
| Production | 1990-1997 |
| Displacement | 1.4L, 1392 cc (84.94 cu in) |
| Fuel system | Carburetor |
| Power adder | None |
| Power output | 76 PS (56 kW, 75 HP) at 6,000 rpm |
| Torque output | 112 Nm (11.4 kg⋅m, 82.6 lb·ft) at 4,000 rpm |
| Firing order | 1-3-4-2 |
| Dimensions (L x H x W): | – |
| Weight | 330 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 alloy | Cast 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: | Top | 0.040-0.080 mm (0.0016-0.0031 in) |
| Second | 0.030-0.070 mm (0.0012-0.0028 in) | |
| Piston ring end gap: | Top | 0.20-0.35 mm (0.0079-0.0138 in) |
| Second | 0.37-0.52 mm (0.0146-0.0205 in) | |
| Oil | 0.20-0.60 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 alloy | Aluminum | |
| 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: | INTAKE | 28.9-29.2 mm (1.138-1.150 in) |
| EXHAUST | 23.9-24.2 mm (0.941-0.953 in) | |
| Valve length: | INTAKE | 92.00-92.5 mm (3.6220-3.6417 in) |
| EXHAUST | 92.37-92.87 mm (3.6366-3.6563 in) | |
| Valve stem diameter: | INTAKE | 5.465-5.480 mm (0.2152-0.2157 in) |
| EXHAUST | 5.445-5.460 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: | №1 | 27.935-27.955 mm (1.0998-1.1006 in) |
| №2-5 | 23.935-23.955 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 valve | 0.21-0.49 mm (0.008-0.019 in) |
| Exhaust valve | 0.30-0.58 mm (0.012-0.023 in) |
| Compression pressure | |
| Standard | 13.5 kg/cm2 (13.24 bar, 192 psi) / 350 rpm |
| Minimun | 11.5 kg/cm2 (11.28 bar, 164 psi) / 350 rpm |
| Compression differential limit between cylinders | 1 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 API | SE, 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 gap | 0.8 – 0.9 mm (0.031 – 0.035 in) |
| Spark plug torque | 19.6-29.4 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 adjusting | For checking | ||
| Hot | Cold* | Hot | |
| Intake | 0.32 – 0.40 (0.013 – 0.016) | 0.25 – 0.33 (0.010 – 0.013) | 0.21 – 0.49 (0.008 – 0.019) |
| Exhaust | 0.37 – 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
| Model | Years 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 |
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
This is excellent and relevant information can i have more on carburetor