Subaru Engine FA20DIT 2.0L Workshop Manual

Repair and maintenance manual for Subaru FA20 DIT 2.0L – turbocharged engine with direct fuel injection. This engine was installed on the following Subaru models:

Subaru WRX (2015–2021)

Subaru Forester XT (2014–2018)

Subaru Levorg (2014–2020)

The manual contains diagrams, specifications, fault diagnostics and repair procedures, including the turbocharging system, fuel system and timing belt. 🚗🔧

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The FA20DIT 2.0L engine is a modern turbocharged engine with direct injection, providing good dynamics. However, it has several weak points that are worth paying attention to.

🛢 1. Increased oil consumption

Problem:

Due to the design features of the piston rings and high heating, the engine can consume a lot of oil (up to 1 liter per 1000 km).

Solution:

Use high-quality oil (preferably 5W-30 or 5W-40).

Check the oil level regularly.

If consumption is significant, replace the piston rings.

🔥 2. Problems with overheating and detonation

Problem:

Due to high pressure in the cylinders, the engine is prone to overheating and detonation.

Pistons, valves and cylinder head gasket may suffer.

Solution:

Use only 98th gasoline.

Coolant temperature control.

Intercooler and cooling system cleaning.

⛽ 3. Clogged fuel injectors (due to direct injection)

Problem:

Direct injection causes carbon deposits to accumulate on the injectors and valves, which reduces power and impairs throttle response.

Solution:

Regular cleaning of injectors every 50,000 km.

Using additives to clean the injection system.

Intake tract flushing (valve cleaning).

🔗 4. Timing chain wear

Problem:

Timing chain stretching and VVT phase regulator problems after 120,000 – 150,000 km.

Errors P0016, P0017 (valve timing error) may appear.

Solution:

Regularly check the condition of the chain.

Replace the chain and tensioners at the first symptoms of stretching.

⚡ 5. Problems with the turbocharging system

Problem:

Coking of the Wastegate valve, which causes the boost to drop.

Turbine wear due to untimely oil changes.

Solution:

Checking and cleaning the Wastegate valve.

Oil change every 5,000 - 7,500 km to extend the life of the turbine.