Parts for your 2011 Subaru Impreza-Thrust bearing

2011 Subaru Impreza thrust-bearing — what it is and how to look after it

Based on the Subaru 2011 Impreza Service Manual (Engine and Clutch sections), Subaru STIS technical documentation, and the Subaru FAST parts catalogue, a thrust bearing is absolutely relevant to a 2011 Subaru Impreza. The EJ-series engine uses a crankshaft thrust main bearing to control endfloat, and manual-transmission models use a clutch release (thrust/throw-out) bearing. The front MacPherson struts also incorporate a thrust-type top mount bearing for smooth steering rotation.

For servicing, the most commonly replaced “thrust” item on a 2011 Impreza is the clutch release bearing on manual models. This little unit sits on the gearbox side of the clutch fork and presses on the pressure plate’s diaphragm spring whenever the clutch pedal is pushed. Its job is to take axial load and spin smoothly so the clutch can disengage without graunching, chatter or pedal vibration. When it’s healthy, gear changes feel silky and pedal effort stays light and consistent.

It’s not a maintenance item you lubricate in place, it’s a replace-when-accessed part. Best practice is to fit a new release bearing every time the clutch kit is replaced, because the labour to get in there is the same. Typical cues it’s on the way out include a chirp, squeal or rough growl that appears when the pedal is depressed and disappears when released, a notchy pedal feel, or clutch shudder that isn’t caused by the friction disc. If any of that crops up, it’s worth booking it in rather than letting it get worse.

When replacing, go for a quality bearing matched to the clutch kit. With the gearbox out, also check the clutch fork pivot, the input shaft guide tube (snout) for scoring, the spigot/pilot bearing in the crank, and the rear main seal. Lightly lubricate the fork pivot points and the bearing’s sliding surfaces on the guide tube with a suitable high-temp moly grease, but keep grease well away from the friction faces. After refit, bleed the hydraulic clutch and confirm smooth, silent operation through the pedal travel.

Worth noting: the engine’s crankshaft thrust main bearing is critical but not a routine service item, it’s assessed during engine repair or overhaul. Automatic Impreza models don’t have a clutch release bearing, but they still rely on the engine’s thrust bearing and the strut top bearings for proper drivability and steering feel.

• Common symptoms of a worn clutch thrust bearing:
  • Squeal or growl only when the clutch pedal is pressed
  • Pedal vibration or a rough, notchy feel
  • Intermittent clutch disengagement noise after cold starts

Popular questions about 2011 Subaru Impreza thrust-bearing

Does a 2011 Subaru Impreza have a thrust bearing?
Yes. All engines use a crankshaft thrust main bearing, and manual-transmission Imprezas also use a clutch release (thrust/throw-out) bearing. The front strut top mounts include a thrust-style bearing for steering rotation as well. These are documented in the Subaru Service Manual and parts catalogue for the 2011 model range.

When should the clutch thrust bearing be replaced?
Replace it whenever the clutch is out — typically with a full clutch kit — or sooner if there’s noise when the pedal is depressed, roughness in the pedal, or clutch shudder linked to the release action. There’s no fixed kilometre interval, condition and symptoms drive the decision.

Is it safe to drive with a noisy thrust (throw-out) bearing?
A short stint may be possible, but it can get louder quickly and risk collateral wear to the pressure plate fingers or the guide tube. If the noise appears only with the pedal down, book it in and sort it before it strands the vehicle or damages other parts.