Parts for your 2004 Toyota Altezza-Thrust bearing

2004 Toyota Altezza thrust-bearing — what it is, and when to sort it

Based on Toyota’s SXE10/GXE10 repair literature (Engine Mechanical and Clutch sections), the Toyota Electronic Parts Catalog for Altezza, and Aisin’s AZ6/J160 transmission service info (same 6-speed used in manual Altezzas), a thrust-bearing is indeed relevant to a 2004 Toyota Altezza. There are two contexts: the engine’s crankshaft thrust bearings (part of the main bearing set controlling end-float) and, on manual models, the clutch release bearing that many owners casually call the “thrust bearing”. Both are factory-fitted parts on the applicable variants.

On a 2004 Altezza with the 6-speed manual, the thrust-bearing most people mean is the clutch release bearing. Its job is simple but crucial: it presses against the clutch’s diaphragm spring when the pedal’s pushed, letting the friction plate disengage cleanly. When healthy, shifts feel smooth and the pedal action is consistent. When it’s tired, you’ll often hear a chirp, whirr, or light grind with the pedal depressed, and feel a notchiness or vibration through the pedal.

Servicing advice is straightforward: the release bearing is a “replace while you’re in there” item. Any time the clutch is out—for a new disc, pressure plate, or flywheel skim—fit a quality new bearing and pilot bearing, check the fork and pivot for wear, and lightly grease the specified contact points only (never the bearing face). On hydraulic cars, inspect the slave cylinder for leaks and confirm smooth travel. Riding the clutch and holding the pedal down at long lights will shorten bearing life, so it’s worth changing that habit.

Auto Altezzas don’t use a clutch release bearing, but the engine still relies on crankshaft thrust bearings to control axial movement. Those aren’t a routine service item, they’re inspected and replaced during engine rebuilds or when diagnosing odd end-float issues (for example, visible crank pulley fore–aft movement or clutch engagement changes with pedal pressure). Toyota’s engine manual lists the measurement method and spec for crank end-play, if it’s out of tolerance, address it before it chews out the crank or block saddles.

• Common signs of a worn clutch thrust/release bearing: noise only when the clutch pedal is depressed, a rough or “gravelly” pedal feel, and chatter on take-off.
• Best practice: replace the release bearing with every clutch kit, and keep the input shaft sleeve clean and lightly lubricated to the manual’s guidance.

Is a noisy thrust-bearing dangerous to keep driving with?

It’ll usually give warning for a while, but once it starts howling, it can fail and score the pressure plate fingers. If the noise is growing, plan a clutch-out job sooner rather than later.

Should the thrust/release bearing be replaced every time the clutch is changed?

Yes—on a manual Altezza it’s standard to replace the release bearing and pilot bearing with the clutch kit. The extra parts are inexpensive compared with the labour of pulling the box again.

Does an automatic Altezza have a thrust-bearing to service?

There’s no clutch release bearing on the auto, but the engine’s crankshaft thrust bearings are still present. They’re not a periodic service item, they’re checked during bottom-end work or if abnormal end-float is suspected.