The Toyota 1JZ-GE is a 2.5 liter (2,492 cc, 152.07 cu-in) straight-six, four-stroke cycle natural 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 kg·m; 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 kg·m; 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 information
| Engine Specifications | |
| Engine code | 1JZ-GE |
| Layout | Four stroke, Inline-6 (Straight-6) |
| Fuel type | Gasoline |
| Production | 1990-2007 |
| 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 kg·m; 173.4 ft·lb) at 4,800 rpm 1996-2000: 251 Nm (25.6 kg·m; 185.24 ft·lb) at 4,000 rpm |
| Firing order | 1-5-3-6-2-4 |
| Dimensions (L x H x W): | – |
| Weight | – |
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 | ||
| 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 kg·m; 32.5 ft·lb
- Step 2: Turn all bolts 90°
Connecting rods cap bolts torque specs:
- Step 1: 29 Nm (3.0 kg·m; 21.4 ft·lb)
- Step 2: Turn all bolts 90°
Flywheel bolt torque specs:
- Step 1: 49 Nm (5 kg·m; 36.16 ft·lb)
- Step 2: Turn all bolts 90°
Drive plate fixing bolts: 83 Nm (8.5 kg·m; 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 torque specs:
- Step 1: 35 Nm; 3.6 kg·m; 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 |
| Oil change interval, km (miles) | 10,000 (6,000) |
| Ignition system | |
| Spark plug | 1991-1997 DENSO: PK16R11; NGK: BKR5EP11 1996-2000 (VVTi) After 2000 (VVTi) |
| 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 | – |
| Toyota Soarer | – |
| Toyota Chaser | – |
| Toyota Cresta | – |
| Toyota Progres | – |
| Toyota Crown | – |
| Toyota Crown Estate | – |
| Toyota Mark II Blit | – |
| Toyota Verossa | – |
Author:
THANKS FOR YOUR INFO AND SPEC FOR TOYOTA 1JZ ENGINE TRIED TO FIND SPEC ON FORUMS WHAT A LOT OF IDIOTS I PITY THE THE ENGINES THEY BUILD EVERYONE IS CONTRADICTING EACH OTHER AND END OF IT YOUSTILL DONT FIND WHAT YOUR AFTER THANKER SW
VERY GOOD WEB SITE
What is consumption like of Toyota 1JZ-GE engine on average.(km/ltr)
City: ~ 15 l/100 km
Highway: ~ 10 l/100 km
Combined: ~ 12-13 l/100 km
A very helpful site.
Please include the pictorial parts of the engine in pdf
This info is really useful and very good for toyota crown lovers
Thank you for the info. Could you please share the fuse box diagram, am trying to make my front defog lights work. Some fuses and relays are missing on my car, so dont know what kind of relay to look for. Thank you.
Cheers.
Thank you for the details given.
Could you please help me to find the size of the serpentine belt this 1jz ge vvti are using.
I really appreciate your help.