Toyota 1GR

Toyota 1GR-FE Engine

  1. Specifications
  2. Overview, problems
  3. Performance tuning

Toyota 1GR engine specs

Manufacturer Kamigo Plant
Shimoyama Plant
Tahara Plant
Toyota Motor Manufacturing Alabama
Also called Toyota 1GR
Production 2002-present
Cylinder block alloy Aluminum
Configuration V6
Valvetrain DOHC
4 valves per cylinder
Piston stroke, mm (inch) 95 (3.74)
Cylinder bore, mm (inch) 94 (3.70)
Compression ratio 10
Displacement 3956 cc (241.4 cu in)
Power output 176 kW (236 HP) at 5,200 rpm
178 kW (239 HP) at 5,200 rpm
189 kW (270 HP) at 5,600 rpm
218 kW (285 HP) at 5,600 rpm
Torque output 361 Nm (266 lb·ft) at 4,000 rpm
377 Nm (278 lb·ft) at 3,700 rpm
377 Nm (278 lb·ft) at 4,400 rpm
387 Nm (289 lb·ft) at 4,400 rpm
HP per liter 59.7
Fuel type Gasoline
Weight, kg (lbs) 166 (366)
Fuel consumption, L/100 km (mpg)

for Tundra
14.7 (16)
11.8 (20)

13.8 (17)
Turbocharger  Naturally aspirated
Oil consumption , L/1000 km
(qt. per miles)
up to 1.0
(1 qt. per 750 miles)
Recommended engine oil 5W-30
Engine oil capacity, L (qt.) 5.2 (5.5)
Oil change interval, km (miles) 5,000-10,000
Normal engine operating temperature, °C (F)
Engine lifespan, km (miles)
-Official information

300,000+ (180,000)
Tuning, HP
-Max HP
-No life span loss


The engine is installed in Toyota 4Runner
Toyota FJ Cruiser
Toyota Hilux
Toyota Land Cruiser 200
Toyota Land Cruiser Prado 120/150
Toyota Tacoma
Toyota Tundra
Lexus GX 400 (China)

Toyota 1GR-FE engine reliability, problems and repair

The Toyota GR generation was introduced in 2002. It was represented by the only one 1GR-FE type. The motor was designated for replacement of out-dated 3.4 liter 5VZ-FE engines. The 1GR was successfully used in Toyota off-roads. The 1GR was provided with a huge aluminium 60°V6 having cast iron sleeves and a 4-liter displacement. The first 1GR-FEs consisted of heavy pistons, heavy crankshaft, and a VVTi-system on the inlet camshafts. Those motors developed up to 249 horsepower. In 2009, the engines started to replace new modified 1GRs. Such types were equipped with a Dual-VVTi variable valve timing system on the inlet and outlet camshafts. Besides, its cylinder head was improved; it was provided with light pistons, compression ratio heightened up to 10.4, intake ports and cylinder sleeves modified, and cooling system improved. The new 1GRFE had a power increased to 270-285 HP.
Firing order is 1-2-3-4-5-6.
Apart from the 4-liter 1GR, there are other simpler GR modifications, such as: 3.5-liter 2GR, 3-liter 3GR, 2.5 L. 4GR, 5GR specially designed for a Chinese market, 4 L. 6GR, and 3.5 L. 7GR.

Toyota 1GR engine problems and malfunctions

If any overheat, the first 1GR-FE motors (single VVTi) can suffer from blown head gasket. So, you must control a cooling system. All the 1GRs have ticking noise. That is absolutely normal as it signifies about gasoline steam ventilation system functioning. The noise accompanies injectors operation.
The 1GRFE is not provided with hydraulic lifters, so you must control the valve clearances once in 60,000 miles (100,000 km) of mileage. The 1GR and 2GR’s problems are alike. Its engine lifespan is over 180,000 miles (300,000 km) of mileage. if it is properly maintained.

Toyota 1GR engine tuning

1GR-FE Supercharger

TRD Company produces supercharger kits designed out of the Eaton M90 supercharger with intercooler, ECU and all other aftermarket parts, specially for the GR engines.
In order everything to work appropriately, you need to lower compression ratio. To do this, you need to buy a thick cylinder head gasket or forged CP Pistons fitted to 9.2 and Carrillo connecting rods. Besides, you may need a TRD inlet system and 3-1 design headers kit. When these performance parts bolted on your 1GR single VVTi, the engine will develop 300-320 horsepower and torque will be 450-500 Nm.

Apart from the TRD supercharger kit, you will be able to find the other, more powerful solution. Doing port and polish, you will get more than 350 horsepower. The TRD supercharger kit is the simplest, not a too much loading engine.