Nissan QG15DE

Nissan QG15DEThe Nissan QG15DE is a 1.5 liter (1,497 cc, 91.35 cu·in) straight-four 4-stroke natural aspirated gasoline engine from Nissan QG-family.

The QG15DE motor has a cast-iron cylinder block and aluminum alloy cylinder head with two overhead camshafts (DOHC). The engine uses a multi-point fuel injection system; an electronic ignition system with individual ignition coil for each cylinder and ERG system. From 1998 to 2001 on Nissan Sunny, the QG15DE engine was available as a Lean Burn version.

It has a 73.6 mm (2.9 in) cylinder bore and 88.0 mm (3.46 in) piston stroke. The compression ratio rating is 9.9:1. The Nissan QG15DE engine produced from 90 PS (66 kW; 88 HP) at 5,600 rpm to 109 PS (80 kW; 107 HP) at 6,000 rpm of maximum output power and from 128 N·m (13.1 kg·m, 94.3 ft·lb) at 2,800 rpm to 143 N·m (14.6 kg·m, 105.4 ft·lb) at 4,000 rpm of peak torque.

The breakdown of the engine code is as follows:

  • QG – Engine Family
  • 15 – 1.5 Liter Displacement
  • D – DOHC (Dual Overhead Camshafts)
  • E – Multi Point Fuel Injection

General information

Engine Specifications
Engine codeQG15DE
LayoutFour stroke, Inline-4 (Straight-4)
Fuel typeGasoline
Production1998-
Displacement1.5 L, 1,497 cm3 (91.35 cu in)
Fuel systemMulti Point Fuel Injection (MFI)
Power adderNone
Power output From 90 PS (66 kW; 88 HP) at 5,600 rpm
to 109 PS (80 kW; 107 HP) at 6,000 rpm
Torque output From 128 N·m (13.1 kg·m, 94.3 ft·lb) at 2,800 rpm
to 143 N·m (14.6 kg·m, 105.4 ft·lb) at 4,000 rpm
Firing order1-3-4-2
Dimensions (L x H x W):
Weight

Cylinder block

The QG15DE motor has a cast-iron cylinder block, cylinder bore is 73.6 mm (2.9 in) and the piston stroke is 88.0 mm (3.46 in). The pistons are each fitted with two compression rings and a single oil ring. The compression ratio is 9.9:1. The engine uses forged-steel connecting rods. The crankshaft main journal diameter is 49.95 mm (1.966 in) and pins journal diameter is 39.97 mm (1.57 in).

Cylinder block
Cylinder block alloyCast iron
Compression ratio:9.9:1
Cylinder bore:73.6 mm (2.9 in)
Piston stroke:88.0 mm (3.46 in)
Number of piston rings (compression / oil):2 / 1
Number of main bearings:5
Block Height:
Cylinder inner diameter (standard):73.600-73.630 mm (2.8976-2.8988 in)
Piston skirt diameter (standard):73.575-73.605 mm (2.8966-2.8978 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)
Second0.040-0.080 mm (0.0016-0.0031 in)
Oil0.035-0.115 mm (0.0014-0.0045 in)
Piston ring end gap:Top0.200-0.490 mm (0.0079-0.0193 in)
Second0.370-0.610 mm (0.0146-0.024 in)
Oil0.200-0.690 mm (0.0079-0.0272 in)
Connecting rod center distance:
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)

Cylinder head

The engine has an aluminum cylinder head with two chain-driven overhead single-piece cast camshafts and sixteen valves (four per cylinder). The QG15DE has a single timing chain. Intake valves are 29.0 mm (1.14 in) in diameter and the exhaust valves are 24.0 mm (0.95).

The QG15DE does not have hydraulic lifters, so special shims are used to adjust the valve clearance.

Cylinder head
Cylinder head alloyAluminum
Cylinder head height:
Valve Arrangement:DOHC, chain drive
Intake duration:
Exhaust duration:
Valve head diameter:INTAKE28.9-29.2 mm (1.1378-1.1496 in)
EXHAUST23.9-24.2 mm (0.9409-0.9528 in)
Valve length:INTAKE92.25 mm (3.6319 in)
EXHAUST92.62 mm (3.6464 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:INTAKE39.975 mm (1.5738 in)
EXHAUST40.151 mm (1.5807 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

Maintenance data

Valve clearance (HOT)
Intake valve0.32-0.40 mm (0.013-0.016 in)
Exhaust valve0.37-0.45 mm (0.015-0.018 in)
Compression pressure
Standard13.5 kg/cm2 (13.25 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, SH or SJ
Engine oil capacity (Refill capacity) With filter change 2.7 l
Without filter change 2.5 l
Oil change interval, km (miles)10,000 (6,000)
Oil Pressure, kPa (bar, kg/cm2 , psi) Idle speed: More than 98 (0.98, 1.0, 14)
2,000 rpm: More than 294 (2.94, 3.0, 43)
6,000 rpm: More than 392 (3.92, 4.0, 57)
Ignition system
Spark plug Standard: BKR5E-11 (NGK), RC10YC4 (Champion)
Hot: BKR4E-11 (NGL)
Cold: BKR6E-11 (NGK)
Spark plug gap1.0 – 1.1 mm (0.039 – 0.043 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 the 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.

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

*: 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 Almera (N16)2000-2006
Nissan Sunny (N16)2000-2005
Nissan Wingroad (Y11)1999-2005
Nissan AD (Y16)1999-2008
Nissan Bluebird Sylphy (G10)2000-2005
Renault Samsung SM3 (N17)2003-2013
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