The Nissan GA14DE is an inline 1.4 liter (1,392 cc; 84.94 cu.in.) four-cylinder, four-stroke cycle, liquid-cooled gasoline engine from the Nissan GA-family, utilizing cast iron for the block and aluminum alloy for the cylinder head.
It is equipped with Multi-Point Fuel Injection system. It has a double overhead camshaft (DOHC) driving sixteen valves.
A 73.6 mm (2.90 in) cylinder bore and 81.8 mm (3.22 in) piston stroke give the engine a total of 1.4 L of displacement. It produces 64.0 kW (87.0 PS, 86.0 HP) at 6,000 rpm and 116.0 Nm (11.83 kg·m; 85.61 lbf·ft) at 4,000 rpm of peak torque. The compression ratio rating is 9.5:1. Redline is at 7,200 rpm.
The GA14DE motor was produced from 1992 through 2001. It was used in the Nissan Sunny N14, Nissan Sentra B14 (EX models in the Philippines), Almera/Pulsar N15.
The breakdown of the engine code is as follows:
- GA – Engine Family
- 14 – 1.4 Liter Displacement
- D – DOHC (Dual Overhead Camshafts)
- E – Multi Point Fuel Injection
General information
| Engine Specifications | |
| Engine code | GA14DE |
| Layout | Four stroke, Inline-4 (Straight-4) |
| Fuel type | Gasoline |
| Production | 1992-2001 |
| Displacement | 1.4L, 1,392 cc (84.94 cu.in.) |
| Power output | 64.0 kW (87.0 PS, 86.0 HP) at 6,000 rpm |
| Torque output | 116.0 Nm (11.83 kg·m; 85.61 lbf·ft) |
| Fuel system | Multi Point Fuel Injection |
| Power adder | None |
| Cooling system | Liquid-cooling |
| Firing order | 1-3-4-2 |
| Dimensions (L x H x W): | – |
| Weight | 330 lbs (150 kg) |
Cylinder block
The GA14DE has a cast-iron cylinder block, bore is 73.6 mm (2.90 in) and stroke is 81.8 mm (3.22 in). The pistons are each fitted with two compression rings and a single oil ring. The crankshaft for the GA14DE 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) | |
| Piston ring side clearance (Second): | 0.030-0.070 mm (0.0012-0.0028 in) | |
| Piston ring end gap (Top): | 0.200-0.350 mm (0.0079-0.0138 in) | |
| Piston ring end gap (Second): | 0.370-0.520 mm (0.0146-0.0205 in) | |
| Piston ring end gap (Oil): | 0.200-0.600 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 and four valves per cylinder (16 valves in total). Intake valves are 29.0 mm in diameter, intake duration is 214°, and the exhaust valves are 24.0 mm, exhaust duration is 214°. The GA14DE does not have hydraulic lifters, so special shims are used to adjust the valve clearance.
| Cylinder head | ||
| Cylinder head alloy | Aluminum | |
| Cylinder head height: | 118.0 mm (4.6456 in) | |
| Valve Arrangement: | DOHC, chain drive | |
| Valves: | 16 (4 valves per cylinder) | |
| Valve timing (INTAKE): | 214° | |
| Valve timing (EXHAUST): | 214° | |
| Valve head diameter (INTAKE): | 28.9-29.2 mm (1.138-1.150 in) | |
| Valve head diameter (EXHAUST): | 23.9-24.2 mm (0.941-0.953 in) | |
| Valve length (INTAKE): | 92.00-92.5 mm (3.6220-3.6417 in) | |
| Valve length (EXHAUST): | 92.37-92.87 mm (3.6366-3.6563 in) | |
| Valve stem outer diameter (INTAKE): | 5.465-5.480 mm (0.2152-0.2157 in) | |
| Valve stem outer diameter (EXHAUST): | 5.445-5.460 mm (0.2144-0.2150 in) | |
| Outer camshaft journal diameter (№1): | 27.935-27.955 mm (1.0998-1.1006 in) | |
| Outer camshaft journal diameter (№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 GA14DE is reliable and durable. 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 GA14DE motor life expectancy is 200,000 miles of mileage (300,000 km) or more.
Maintenance data
| Valve clearance | |
| 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 | SAE 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 liters (3.4 US.qts, 2.8 Imp. qts) Without filter change: 2.8 liters (3.0 US.qts, 2.5 Imp. qts) |
| Oil change interval, km (miles) | 5,000-10,000 (3,000-6,000) |
| Oil Pressure, kPa (bar, kg/cm2, 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 Cold: BKR6E, BKR7E |
| 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 | 1992-1995 |
| Nissan Sentra B14 (Philippines) | 1996-2000 |
| Nissan Sentra (South Africa) | 1999 |
| Nissan Almera/Pulsar N15 | 1995-2001 |
Author:
My GA 14 engine over heats whenever I turn on the car air-con. Whats wrongn with my engine. I already changed the piston rings.
My car keeps shutting off…even thoughbgas is in it…could it be that i need a new distributor
What is the normal or ideal fuel injector reading in ohms? Sentra 1998 EX Saloon (Philippines) GA14 here.