2021 Subaru Outback BaseFACTORY OEM SERVICE PROCEDURE

Section 10 (Engine Mechanical System (2.4L)): General Description: Specification: Engine

WARNING: This page is about a different variant/trim than selected.
Model 2.4 L
Cylinder arrangement Horizontally opposed, liquid cooled, 4-cylinder 4-stroke gasoline engine
Valve system mechanism Chain driven, double overhead camshaft, 4-valve/cylinder
Bore x Stroke mm (in) 94.0 x 86.0 (3.70 x 3.39)
Displacement cm3 (cu in) 2, 387 (146)
Compression ratio 10.6
Compression pressure (at 200 - 300 r/min) kPa (kg/cm2 , psi) Standard 1, 350 - 1, 750 (14 - 18, 196 - 254)
Number of piston rings Compression ring: 2 Oil ring: 1
Intake valve timing Open Max.retard ATDC 36°
Min.advance BTDC 42°
Close Max.retard ABDC 92°
Min.advance ABDC 14°
Exhaust valve timing Open Max.retard BBDC 11°
Min.advance BBDC 66°
Close Max.retard ATDC 55°
Min.advance ATDC 0°
Cam clearance mm (in) Intake Standard 0.13+0.02 -0.03
(0.0051+0.0008 -0.0012)
Exhaust Standard 0.22 ±0.02 (0.0087±0.0008)
Idle rpm (select lever in "P" or "N" range) r/min No load Standard 700±100
A/C ON Standard 800 - 885±100
Ignition order 1 → 3 → 2 → 4
Ignition timing BTDC/{r/min} Standard 0°±10°/700
Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.