Parts for your 2007 Subaru Impreza-Thrust bearing

2007 Subaru Impreza thrust-bearing: what it is and when it matters

Based on the Subaru Factory Service Manual for the 2007 Impreza (EJ-series engines), the Subaru Technical Information System (STIS) engine overhaul procedures, and Subaru parts catalogues, the 2007 Subaru Impreza does use a thrust bearing. It’s integrated into the crankshaft main bearing set to control end-float, and manual-transmission models also have a clutch release bearing (often casually called a thrust bearing) that rides the clutch diaphragm. So yes—thrust bearings are relevant to this model.

On a 2007 Subaru Impreza, the engine’s thrust bearing is part of the main bearings that support the crankshaft. Its job is to handle axial (end-to-end) loads—things like the clutch pushing on the crank via the flywheel—and keep crank end-play within spec. When healthy, it stops the crank from shuffling back and forth, which protects the oil film, keeps the timing and clearances stable, and prevents odd noises under the bonnet.

Because it’s an internal engine bearing, the crank thrust bearing isn’t a routine service item. It’s checked during engine rebuilds or when diagnosing issues like excessive crank end-float. Techs measure end-play with a dial gauge against the FSM spec and inspect the thrust faces as part of an overhaul. If there’s metallic glitter in the oil, a rhythmic knock that changes with clutch use, or visible pulley movement fore/aft, that’s time for a proper inspection.

For manual gearboxes, the clutch release (throw-out) bearing is the one owners will encounter in regular servicing. It pushes on the pressure plate fingers whenever the clutch pedal is pressed. If it’s worn, expect a chirp, whirr, or grind when the pedal is engaged or released. Best practice—backed by dealer procedures and clutch kit makers—is to replace the release bearing any time the clutch is replaced. It’s inexpensive compared with the labour of pulling the gearbox, so doing it together saves a second tear-down.

Good habits help both bearings: avoid riding the clutch, service the gearbox and engine oils on schedule, and chase leaks early so lubrication stays on point. For high-kilometre cars, if the clutch is out, consider inspecting the flywheel and rear main area, if the engine is being rebuilt, use quality bearings and follow the FSM clearances and torque sequences to the letter.

• Common signs to check: clutch-pedal noise (release bearing), metallic debris in oil, end-float movement at the crank pulley, or changes in idle when pressing the clutch.

Does a 2007 Subaru Impreza have a thrust bearing?

Yes. The EJ-series engine uses a thrust bearing as part of the crankshaft main bearing set to control end-float. Manual-transmission models also have a clutch release (throw-out) bearing, sometimes casually called a thrust bearing. These are different parts doing different jobs—one inside the engine, one in the clutch system.

What symptoms point to a worn thrust or release bearing?

Engine thrust bearing red flags include noticeable fore/aft movement at the crank pulley, metallic particles in the oil, or a knock that changes when the clutch is pressed. A failing clutch release bearing usually chirps, squeals, or grinds when the pedal is depressed or released, and may give a notchy pedal feel.

When should the thrust or release bearing be replaced?

The engine’s thrust bearing is addressed during an engine rebuild or if end-float is out of spec per the FSM. The clutch release bearing should be replaced whenever the clutch is renewed—doing both together is the most cost-effective approach, given the labour to remove the gearbox.