Subaru Engine EZ36 Full Workshop Manual

Welcome to the complete Subaru EZ36 Engine maintenance and repair manual!

In this manual, you will find detailed technical data, diagrams, instructions for diagnostics, disassembly, assembly and repair of this six-cylinder boxer engine.

What's inside:

✅ Detailed analysis of the engine design and its systems

✅ Step-by-step instructions for maintenance and repair

✅ Diagnostic error codes and their decoding

✅ Recommendations for tuning and adjustment

✅ Electrical diagrams and fuel system diagrams

This manual will become an indispensable assistant for both professionals and owners of Subaru cars with an EZ36 engine who want to better understand its operation and properly care for it.

🚙 Subaru Tribeca (B9/Tribeca) – 2008-2014
🚙 Subaru Outback 3.6R – 2010-2019
🚙 Subaru Legacy 3.6R – 2010-2019

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1. Engine overheating

🔹 Problem: The radiator and cooling system can become clogged, causing overheating.

🔹 Solution: Regularly change the coolant, check the thermostat and radiator.

2. Head gasket problems

🔹 Problem: Over time, the cylinder head gaskets can wear out, causing coolant or oil to leak.

🔹 Solution: Replace the gaskets at the first sign of a leak (for example, white smoke from the exhaust pipe or overheating).

3. Increased oil consumption

🔹 Problem: In some cases, the engine may consume more oil than normal, especially if the mileage is more than 150,000 km.

🔹 Solution: Use high-quality oil and check its level regularly.

4. Timing chain wear

🔹 Problem: Over time, the timing chain can stretch, causing noise and potential problems with valve timing.

🔹 Solution: Regular maintenance, timely diagnostics and replacement of the chain if necessary.

5. Ignition coil and spark plug malfunctions

🔹 Problem: The engine may run rough due to faulty ignition coils or worn spark plugs.

🔹 Solution: Scheduled replacement of spark plugs every 80,000–100,000 km and inspection of coils.

6. Oil leaks

🔹 Problem: Over time, oil leaks may occur from valve covers and seals.

🔹 Solution: Regularly check seals and timely replacement if necessary.

7. Problems with the cooling system (pump, thermostat)

🔹 Problem: The water pump (pump) may fail, which leads to engine overheating.

🔹 Solution: Replace the pump and thermostat at the first sign of malfunction.