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Subaru EZ36 Engine Review

EZ36 Engine

The EZ36 engine was introduced in 2007 as the new power unit for Subaru Tribeca (the EZ36D version). This engine became the largest displacement engine available for Subaru models. The EZ36 replaced the EZ30 engine in 2009 altogether.

The engine got the reinforced aluminum cylinder block. The cast iron sleeves have reduced thickness 1.5 mm instead 2.0 mm in the EZ30. The cylinder block height is the same 202 mm. The engine has asymmetric connecting rods (125 mm length). These changes allowed getting more significant displacement - from 3.0 to 3.6 liter. The new aluminum cylinder heads have four valves per cylinder and two camshafts. Each camshaft is equipped with variable valve timing system AVCS (Dual AVCS). The combustion chambers in the cylinder heads were redeveloped. The AVLS system, which changes valve lift by engine revs, doesn't exist in this engine. The EZ36 uses three chains. Also, engineers redesigned the exhaust manifolds (headers) and the engine cooling system.

Engine Specs

Manufacturer
Gunma Oizumi Plant
Production years
2007-present day
Cylinder block material
Aluminum
Cylinder head material
Aluminum
Fuel type
Gasoline
Fuel system
Fuel injection
Configuration
Boxer (Flat-6)
Number of cylinders
6
Valves per cylinder
4
Valvetrain layout
DOHC
Bore, mm
92.0
Stroke, mm
91.0
Displacement, cc
3629
Type of internal combustion engine
Four-stroke, naturally aspirated
Compression Ratio
10.5
Power, hp
260/6000
Torque, lb ft
247 (335 Nm)/4400
Engine weight
401 lbs (182 kg)
Firing order
1-6-3-2-5-4
Engine oil weight
0W-30, 5W-30, 5W-40, 10W-30, 10W-40
Engine oil capacity, liter
6.3
Oil change interval, mile
9,000
Applications
Subaru Legacy, Subaru Outback, Subaru Tribeca

EZ36 Engine Problems and Reliability

This 3.6-liter engine has almost the same problems, which are characterized the 3.0l EZ30 engine. But we can say what the EZ36 is more reliable than its predecessor. The engine life is about 180,000 miles (300,000 km).

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