Toyota 1JZ-GTE/GE/FSE Engine Specs, Problems, Reliability. Toyota’s 1JZ is a 2.5-liter straight-six naturally aspirated or turbocharged gasoline engine out of JZ family which also includes 3.0-liter version – 2JZ engine. The 1JZ series was produced from 1990 to 2007 and utilized in rear-wheel-drive Toyota’s designs such as Toyota Supra, Toyota Mark II, Toyota Crown, Toyota Soarer, and etc. The engine ended up being popular thanks to a turbocharged variation (1JZ-GTE) in addition to extraordinary reliability and capacity for tuning. But the most widespread 1JZ engine is the 1JZ-GE – 2.5 L naturally aspirated variation.
All 1JZs have a cast iron cylinder block, aluminum cylinder head with four valves per cylinder (24 valves overall) and solid shimless buckets (no hydraulic lifters), double overhead camshafts driven by a toothed timing belt, and two-stage variable length intake manifold (Toyota’s ACIS). Later on 1JZ-GE engines had an ignition system with distributor and 10:1 compression ratio. After updating in 1995, they were equipped with DIS-3 distributorless ignition and variable valve timing technology VVT-i for the consumption only. 1JZ-GE VVT-i engines have a 10.5:1 compression ratio. As you can see, the most typical 1JZ variation is an easy six-cylinder engine with a minimum of unreliable and expensive electronic elements.
The 1JZ-GTE engine is a high-performance variation utilized in stylish designs. The very first generation 1JZ twin turbo was geared up with two CT12A turbochargers producing together a 10 psi (0.7 bar) of boost pressure. The 1JZ-GTE Gen 1 has created connecting pistons and rods lowering compression ratio to 8.5:1. The fuel system got 380 cc injectors. 1JZ-GTE camshaft specifications: period – 224/228 deg (intake/exhaust), valve lift 7.69/ 7.95 mm (intake/exhaust).
Like the 1JZ-GE, the 1JZ-GTE went through some modifications in 1996. This second-gen turbo 1JZ has Toyota’s BEAMS architecture. The most significant one is the replacement of 2 turbochargers with a single CT-15B turbocharger. Toyota’s engineers likewise included the VVT-i system for the consumption and increased the compression ratio to 9.0:1. A new cylinder head has smaller sized exhaust ports and customized water coats for efficient cooling. New customized turbo engines produce the exact same power, but limit torque was increased by 15 lb-ft (20 Nm) and more visible, have 50% torque increase low engine speeds.
In 2000, Toyota presented the 1JZ-FSE – a 2.5-liter inline six-cylinder direct-injected gasoline engine. The 1JZ-FSE engine had an engine block from the 1JZ-GE and special cylinder head style implementing Toyota’s direct injection system D-4. FSE engines have 11.0:1 compression ratio and constantly came with VVT-i.
Toyota 1JZ-GTE/GE/FSE Engine Problems and Reliability
1JZ engines are very trustworthy and there are no significant problems with appropriate care. They are thought about as ideal workpieces for different modifications and tuning. Let’s highlight a couple of typical problems occurring with the 1JZ series.
Of all, the 1JZ water pump is a really brief part. The engine hesitates of wetness and wet cleaning. Those yearly’s VVT-i systems are not as good and trusted as nowadays. Damaged VVT-i triggers rough idle, a misfire, and produces odd knocking sounds from the cylinder head. Another factor for a misfire is often stopped working ignition coils of the DIS-3 ignition. The 1JZ-GTE Gen 1 features turbochargers with ceramic turbine wheels, which are prone to delamination and failure under high temperature and increase. In general, the first generation of turbocharged 1JZ is more susceptible to turbo failure. 1JZ engines take in a lot of oil, specifically if the mileage is far beyond a number of hundred thousand miles, which is not uncommon.
The most durable and trusted 1JZ is a simple non-VVT-i 1JZ-GE engine. The longevity is well over 200,000 miles (320,000 km), but they are old now and discover among these engines in a good shape is not a simple job.
Toyota 1JZ-GTE/GE/FSE Engine Specs
|Manufacturer||Tahara Plant, Japan|
|Cylinder block material||Cast Iron|
|Cylinder head material||Aluminum|
|Fuel system||Multiport sequential fuel injection (SFI);
|Number of cylinders||6|
|Valves per cylinder||4|
|Bore, mm||86.0 mm (3.39 in)|
|Stroke, mm||71.5 mm (2.81 in)|
|Displacement, cc||2,492 cc (152.1 cu in)|
|Type of internal combustion engine||Four-stroke, turbocharged|
|Compression Ratio||11.0:1 – 1JZ-FSE
10.0:1 – 1JZ-GE
10.5:1 – 1JZ-GE VVT-i
8.5:1 – 1JZ-GTE
9.0:1 – 1JZ-GTE VVT-i
|Power, hp||170-280 hp (125-205 kW)/6,000-6,200|
|Torque, lb ft||173-280 lb-ft (235-379 Nm)/4,000-4,800|
|Engine weight||455 lbs (207 kg)|
|Engine oil weight||SAE 5W-30 – non turbo;
SAE 10W-30 Synthetic Motor Oil – turbo engines
|Engine oil capacity, liter||5.4 l (5.7 qt) – 1JZ-GTE/GE 2WD Mark 2, Cresta, Chaser|
|Oil change interval, mile||10,000 (15,000 km) / 12 months|
|Applications||Toyota Crown, Toyota Mark II, Toyota Supra, Toyota Brevis, Toyota Chaser, Toyota Cresta, Toyota Mark II Blit, Toyota Progres, Toyota Soarer, Toyota Tourer V, Toyota Verossa|
Toyota 1JZ-GTE/GE/FSE Engine Modifications
- 1JZ-GE (1990-1995) – 170 hp (125 kW) at 6,000 rpm, 173 lb-ft (235 Nm) at 4,800 rpm.
- 1JZ-GE VVT-i (1995-2007) – 200 hp (147 kW) at 6,000 rpm, 185 lb-ft (251 Nm) at 4,000 rpm.
- 1JZ-GTE (1990-1996) – 280 hp (206 kW) at 6,200 rpm, 268 lb-ft (363 Nm) at 4,800 rpm.
- 1JZ-GTE VVT-i (1996-2007) – 280 hp (206 kW) at 6,200 rpm, 280 lb-ft (379 Nm) at 2,400 rpm.
- 1JZ-FSE (2000-2007) – 200 hp (147 kW) at 6,000 rpm, 184 lb-ft (250 Nm) at 3,800 rpm.