Subaru EZ36 engine specifications
| Characteristics | Value |
|---|---|
| Manufacturing | Gunma Oizumi Plant |
| Engine brand | EZ36 |
| Years of manufacture | 2007-present |
| Cylinder Block Material | aluminum |
| Power system | injector |
| Type | opposite |
| Number of cylinders | 6 |
| Valves per cylinder | 4 |
| Piston stroke, mm | 91 |
| Cylinder diameter, mm | 92 |
| Compression ratio | 10.5 |
| Engine displacement, cc | 3629 |
| Engine power, hp/rpm | 260/6000 |
| Torque, Nm/rpm | 335/4400 |
| Fuel | 95 |
| Engine weight, kg | ~180 |
| Fuel consumption, l/100 km (for Tribeca) | City: 16.2 Highway: 9.0 Mixed: 11.6 |
| Oil consumption, gr./1000 km | to 1000 |
| Engine oil | 0W-30, 5W-30, 5W-40, 10W-30, 10W-40 |
| How much oil in the engine, liters | 6.3 |
| Oil change is carried out, km | 15000 |
| Operating temperature of the engine, deg. | ~90 |
| Engine life, thousand kilometers | in practice 300+ |
| Tuning | Potential: 300+ Without loss of resource: 300+ |
| Motor installed | Subaru Legacy, Subaru Outback, Subaru Tribeca |
The Subaru EZ36 engine has been manufactured at the Gunma Oizumi Plant from 2007 to the present. This six-cylinder unit has an opposed configuration and the cylinder block is made of aluminum, with four valves per cylinder.
The EZ36 engine has an impressive displacement of 3,629 cubic centimeters, with a compression ratio of 10.5. It produces 260 horsepower at 6,000 rpm and a maximum torque of 335 Nm at 4,400 rpm.
It is recommended to use fuel with an octane rating of 95 to run this engine. Fuel consumption for the Subaru Tribeca model is 16.2 liters per 100 km in the city, 9.0 liters per 100 km on the highway and 11.6 liters per 100 km in mixed mode.
Oil consumption can reach up to 1000 grams per 1000 km. For the EZ36 engine it is recommended to use oils with viscosity 0W-30, 5W-30, 5W-40, 10W-30 and 10W-40, and the volume of oil in the engine is 6.3 liters. It is recommended to change the oil every 15000 km, although to increase the longevity of the engine it is better to do it every 7500 km.
In practice, the engine resource can exceed 300 thousand kilometers. EZ36 engine is installed on Subaru Legacy, Subaru Outback and Subaru Tribeca.
Malfunctions and repair of the engine Subaru EZ36
In 2007, the Subaru Tribeca was introduced with the new, highest-capacity EZ36D engine, replacing the EZ30. It had a reinforced cylinder block with 1.5mm thick cast iron liners. The cylinder diameter increased to 92 mm, the crankshaft with a 91 mm piston stroke was inserted inside the block, and the block height remained the same – 202 mm. New 125mm asymmetrical connecting rods were used on the EZ36, and the compression ratio was reduced to 10.5. These changes allowed the engine to achieve a displacement of 3.6 liters.
The block was fitted with new cylinder heads with Dual AVCS to change the timing of the intake and exhaust camshafts. The intake camshafts had an adjustment range of 51° and the exhaust camshafts had an adjustment range of 21°. The timing system included 3 chains. The block heads also had redesigned combustion chambers, although there was no AVLS system to change valve lift height. The engine cooling system and exhaust manifold were also redesigned for the EZ36.
These improvements resulted in a power output of 260 hp at 6,000 rpm and 335 Nm of torque at 4,000 rpm.
EZ36 engine problems and shortcomings
- The most common complaints online are high fuel consumption and regular oil leaks
- In second place comes overheating due to another problem on the cooling system
- Cheap oil here causes the tensioner to fail and the timing chain to start making noise
- The pressure regulator in the fuel pump is also unreliable
- At mileage over 150 – 200 thousand kilometers there is often already oil consumption for carbon monoxide
Subaru EZ36 engine tuning
Turbo
The process of increasing the power of the EZ36 is similar to the EZ30, which means you shouldn’t waste precious time on sport camshafts and trying to get extra horses in the atmospheric version. The only true option is supercharging. It is possible to make an analog of EZ30 turbo. Turbo option is more complicated, but the power is more, with a compressor it is realistic to get 400+ hp on stock pistons, which is also not bad. However, the prices for compressor kits are quite high.
MOTOR RATING: 4+