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Home / Car Engines / Toyota Engines / Toyota 1JZ-GE

Toyota 1JZ-GE Engine Specifications

The Toyota 1JZ-GE is a 2.5 liter (2,492 cc, 152.07 cubic inches) straight-six, four-stroke cycle naturally aspirated gasoline engine from the Toyota JZ-family. The engine was manufactured by the Toyota Motor Corporation on the Tahara Plant (Tahara, Aichi, Japan) from 1990 to 2007. The Toyota 1JZ-GE engine features a cast-iron block, aluminum cylinder head with dual belt-driven overhead camshafts and four valves per cylinder (24 in total). The 1JZ-GE is equipped with an electronic fuel injection system, VVT-i (Variable Valve Timing with intelligence) since 1996, ACIS variable-length intake manifold. Bore and stroke are 86.0 mm (3.39 in) and 71.5 mm (2.81 in), respectively. The first generation of the Toyota 1JZ-GE had a compression ratio rating of 10.5:1, ignition system with a mechanical distributor and was manufactured from 1990 to 1995. This version produced 170 PS (125 kW; 168 HP) at 6,000 rpm of maximum horsepower and 235 Nm (24.0 kgm; 173.4 ft-lb) at 4,800 rpm of peak torque. Redline is 7,500 rpm. The second generation had a compression ratio of 10.5:1 , VVT-i system on the inlet camshaft and DIS-3 ignition system with 3 ignition coils. This engine produced 200 PS (147 kW; 197 HP) at 6,000 rpm of horsepower and 251 Nm (25.6 kgm; 185.24 ft-lb) at 4,000 rpm of maximum torque. Redline is 7,000 rpm.

The breakdown of the engine code is as follows:

1 – 1-st generation engine
JZ – Engine family
G – Performance wide-angle DOHC
E – Multi-Point Fuel Injection

GENERAL TECHNICAL DATA

Engine model ...................... 1JZ-GE
Cylinder layout ...................... Four stroke, Inline-6 (Straight-6)
Fuel type ...................... Gasoline
Year of production ...................... 1990-2007
Total displacement ...................... 2.5 L, 2,492 cm3 (152.07 cu in)
Fuel system ...................... Multi-point fuel injection system
Power adder ...................... None
Max. horsepower ...................... 1990-1996:
170 PS (125 kW; 168 HP) at 6,000 rpm
1996-2000:
200 PS (147 kW; 197 HP) at 6,000 rpm
Max. torque ...................... 1990-1996:
235 Nm (24.0 kgm; 173.4 ft-lb) at 4,800 rpm
1996-2000:
251 Nm (25.6 kgm; 185.24 ft-lb) at 4,000 rpm
Firing order ...................... 1-5-3-6-2-4
Dimensions (L x H x W) ...................... No data available
Weight ...................... No data available

CYLINDER BLOCK

The Toyota 1JZ-GE engine has a cast-iron cylinder block, bore is 86.0 mm (3.39 in) and stroke is 71.5 mm (2.81 in). The cylinder block, a monoblock specially cast structure, employs the seven bearing support system. The crankshaft has seven journals and twelve counterweights; both pins and journals were induction-hardened.

The pistons are special aluminum casting. Each piston is fitted with two compression rings and a single oil ring. Compression ratio rating for 1JZ-GE without VVT-i system is 10.0:1, for the version with VVT-i, is 10.5:1.

Cylinder block alloy ...................... Cast-iron
Compression ratio ...................... 1990-1995 (Without VVTi): 10.5:1
1996-2000 (With VVTi): 10.0:1
Cylinder bore ...................... 86.0 mm (3.39 in)
Piston stroke ...................... 71.5 mm (2.81 in)
Number of piston rings (compression / oil) ...................... 2 / 1
Number of main bearings ...................... 7
Cylinder inner diameter (standard) ...................... 86.000-86.013 mm (3.3858-3.3863 in)
Piston skirt diameter (standard) ...................... 85.935-85.945 mm (3.3832-3.3836 in)
Piston pin outer diameter ...................... 21.997-22.006 mm (0.8660-0.8664 in)
Piston ring side clearance ...................... Top ...................... 0.011-0.070 mm (0.0004-0.0027 in)
Second ...................... 0.030-0.070 mm (0.0012-0.0028 in)
Piston ring end gap ...................... Top ...................... 0.30-0.40 mm (0.0118-0.0157 in)
Second ...................... 0.35-0.45 mm (0.0137-0.0177 in)
Oil ...................... 0.13-0.38 mm (0.0051-0.0150 in)
Crankshaft main journal diameter ...................... 62.000 mm (2.4410 in)
Crankpin diameter ...................... 52.000 mm (2.0472 in)
Crankshaft center distance ...................... 35.75 mm (1.4074 in)
Main bearing cap bolts torque specs:

Step 1: 44 Nm; 4.5 kgm; 32.5 ft-lb
Step 2: Turn all bolts 90°
Connecting rods cap bolts torque specs:

Step 1: 29 Nm (3.0 kgm; 21.4 ft-lb)
Step 2: Turn all bolts 90°
Flywheel bolt torque specs:

Step 1: 49 Nm (5 kgm; 36.16 ft-lb)
Step 2: Turn all bolts 90°
Drive plate fixing bolts: 83 Nm (8.5 kgm; 61.3 ft-lb)

CYLINDER HEAD

The cylinder head is made of a light, strong aluminum alloy with good cooling efficiency. Camshafts are made of specially cast steel and are driven by timing belt. The 1JZ-GE has the intake valves with a head diameter of 33.6 mm (1.3228 in) and the exhaust valves with a head diameter of 29.0 mm (1.1417 in).

The Toyota 1JZ engines are not equipped with hydraulic lifters, so special valve shims are used to adjust the valve clearance.

Cylinder head alloy: Aluminum Valve Arrangement: DOHC, belt drive Valves: 24 (4 valves per cylinder) Intake duration: – Exhaust duration: – Valve head diameter: INTAKE 33.6 mm (1.3228 in) EXHAUST 29.0 mm (1.1417 in) Valve length: INTAKE 98.29-98.79 (3.8697-3.8894 in) EXHAUST 98.84-99.34 mm (3.8913-3.9110 in) Valve stem diameter: INTAKE 5.970-5.985 mm (0.2350-0.2356 in) EXHAUST 5.965-5.980 mm (0.2348-0.2354 in) Valve spring free length: 41.50 mm (1.6338 in) or 41.74 mm (1.6433 in) Camshaft lobe height: INTAKE 44.200-44.300 mm (1.7400-1.7440 in) EXHAUST 44.250-44.350 mm (1.7420-1.7460 in)
Cylinder head torque specs:

Step 1: 35 Nm; 3.6 kgm; 25.83 ft-lb
Step 2: Turn all bolts 90°
Step 2: Turn all bolts another 90°

MAINTENANCE DATA

Valve clearance
Intake valve ...................... 0.15-0.25 mm (0.006-0.010 in)
Exhaust valve ...................... 0.25-0.35 mm (0.010-0.014 in)
Compression pressure
Standard ...................... 12.5-13.5 kg/cm2 / 350 rpm
Minimun ...................... 10.0-11.0 kg/cm2 / 250 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
Oil type API ...................... SG or SJ
Engine oil capacity (Refill capacity) ...................... 2WD
Without oil filter: 5.1-5.4 l
With oil filter: 5.4-5.7 l
4WD
Without oil filter: 4.2-4.5 l
With oil filter: 4.5-4.8 l

Oil change interval, km (miles) ...................... 10,000 (6,000)
Ignition system
Spark plug ...................... 1991-1997
DENSO: PK16R11; NGK: BKR5EP11
1996-2000 (VVTi)
DENSO: PK16TR11; NGK: BKR5EKPB11

After 2000 (VVTi)
DENSO: SK16R-P11;

Spark plug gap ...................... 1.0-1.1 mm (0.039-0.043 in)
Valve clearance adjustment data
Calculate the thickness of new adjusting valve lifter so valve clearance comes within specified values.

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

Intake:
N = R + [M – 0.20 mm (0.008 in)]
Exhaust:
N = R + [M – 0.30 mm (0.012 in)]

Valve lifters are available in 17 sizes range from 2.50 mm (0.0984 in) to 3.30 mm (0.1181 in), in steps of 0.05 mm (0.0020 in).

Example (intake valve):
R = 2.90 mm
M = 0.40 mm
N = 2.90 + (0.40 – 0.20) = 3.10 mm, so we need a valve shim with thickness of 3.10 mm (0.1220 in).

VEHICLE APPLICATIONS

Model ...................... Years Produced
Toyota Марк II ...................... No data available
Toyota Soarer ...................... No data available
Toyota Chaser ...................... No data available
Toyota Cresta ...................... No data available
Toyota Progres ...................... No data available
Toyota Crown ...................... No data available
Toyota Crown Estate ...................... No data available
Toyota Mark II Blit ...................... No data available
Toyota Verossa ...................... No data available

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