Parts for your 2010 Subaru Outback-Thrust bearing

2010 Subaru Outback thrust bearing: what it is and when to sort it

Based on the Subaru Factory Service Manual for the 2010 Outback/Legacy (engine sections for EJ25 and EZ36), the Subaru FAST electronic parts catalogue, and transmission training material for the TR690 Lineartronic CVT, this model does use an engine crankshaft thrust bearing. It’s not a stand-alone service item, it’s integrated into the engine’s main bearing set and controls crankshaft end-float. Some owners and workshops also use “thrust bearing” to mean the clutch release (throwout) bearing on manual Outbacks, and there’s a thrust-style bearing in the front strut top mounts too. So yes, a thrust bearing is relevant to this vehicle—just be clear which one you’re chasing.

For the engine, the thrust-bearing surfaces are there to handle axial loads on the crank—things like clutch pedal force on manuals and converter or accessory loads on autos/CVTs. Keeping end-float in spec prevents crankwalk, protects the oil pump and timing gear alignment, and keeps the engine happy over big kilometres.

• When to check: during clutch replacement (manuals), engine-out work, or if there’s odd behaviour like the crank pulley moving fore–aft, clutch engagement changing as the pedal’s held down, or contact marks at the flexplate/flywheel.
• Good habits: don’t sit at the lights riding the clutch, keep mounts in good nick, use correct-grade engine oil, fix misfires and idle issues that shock-load the driveline.
• Diagnostics: measure crankshaft end-float with a dial gauge against the pulley or flywheel. Compare to the FSM spec and inspect for metallic debris in the sump during services if you suspect wear.

Replacement of the engine thrust bearing isn’t a routine service task. On the EJ/EZ boxer engines, it’s part of an engine rebuild: engine out, case halves split, new main bearing set fitted, clearances verified (plastigauge/micrometer), and thrust faces checked for wear. If end-float is out of spec, plan for a short-block refresh rather than a quick in-car fix. That’s one for a competent engine reconditioner or a Subaru-savvy workshop.

If the concern is a noisy “thrust” bearing on a manual Outback, that’s usually the clutch release bearing—replace it with the clutch kit. If you’re talking about a steering groan or notchiness, you’re looking at the front strut top mount bearing. Different jobs, different parts, and far easier than an engine thrust bearing.

• Does a 2010 Subaru Outback have a thrust bearing?
  Yes. Per the Subaru Workshop Manual and parts catalogue, the EJ25 and EZ36 engines use a crankshaft thrust bearing integrated into the main bearings. Manual models also have a clutch release (throwout) bearing that some people call a thrust bearing, and the front strut top mounts include a thrust-style bearing for steering rotation.
• When should the engine thrust bearing be replaced?
  Only during an engine rebuild or if end-float is out of spec and there are signs of crankwalk or axial wear. It’s not a regular service item. If the noise happens only when pressing the clutch pedal in a manual, it’s more likely the release bearing, which is replaced with the clutch kit.
• What are the symptoms of a failing thrust bearing?
  Engine thrust issues can show as fore–aft movement of the crank pulley, variable clutch engagement point when holding the pedal, or metal in the oil. A whirring that changes with clutch pedal position on a manual points to the release bearing, not the engine thrust bearing. Steering notchiness or groans over bumps usually indicate a worn strut top bearing.