Parts for your 2008 Mazda Premacy-Thrust bearing

2008 Mazda Premacy thrust-bearing — what it does and when to sort it

Technical references including the Mazda Premacy (CR) Workshop Manual for 2005–2010, the Mazda Electronic Parts Catalogue, and gearbox/clutch assembly diagrams confirm that 2008 Premacy models equipped with a manual transmission are fitted with a clutch release (thrust) bearing. Automatic variants don’t use a clutch release thrust bearing. All engines do have internal crankshaft thrust bearings as part of the main bearing set, but those aren’t routine service items. So, “thrust-bearing” is relevant for manual 2008 Mazda Premacy models, typically referred to as the clutch release or throw-out bearing.

On a manual Premacy, the thrust-bearing sits between the clutch fork or concentric slave cylinder and the diaphragm spring of the pressure plate. Its job is simple but crucial: it lets the spinning clutch assembly be pressed smoothly by a non-spinning actuator, so the clutch can disengage without graunching or drag. When it’s healthy, gear changes feel clean and the pedal action is quiet and predictable.

There’s no scheduled maintenance on the thrust-bearing because it’s a sealed unit, but it’s considered a wear item. Best practice is to replace it whenever the clutch kit is changed. That’s because most of the labour is in removing the gearbox, so it makes sense to renew the bearing, pressure plate, friction disc, and pilot bearing/bush together.

• Common symptoms of a tired thrust-bearing include: a whirr, chirp, or squeal when the clutch pedal is pressed, a rough or notchy pedal feel, and difficulty selecting gears when stationary.
• If noise occurs only with the pedal depressed, the thrust-bearing is a prime suspect. If noise is present with the pedal released, consider the input shaft bearing or other gearbox bearings.

Replacement tips a careful workshop will follow on a 2008 Premacy:

• Inspect the guide tube/snout the bearing slides on, the clutch fork pivot, and the release lever for wear, replace or dress as needed.
• Use a light smear of the correct high-temp moly grease on the guide tube and fork contact points, keep lubricant well away from the friction surfaces.
• Check clutch hydraulics (master/slave or concentric slave) for leaks and proper travel, bleed with fresh brake fluid to spec.
• Confirm flywheel condition and runout, machine or replace if heat-spotted, cracked, or out of spec.

Depending on transmission variant, the Premacy may use a conventional release bearing with an external slave and fork, or a concentric slave cylinder with an integrated bearing. Either way, choosing a quality bearing and fitting it with a complete clutch kit helps ensure quiet, drama-free shifting for many more kilometres.

Popular questions about 2008 Mazda Premacy thrust-bearing

Does a 2008 Mazda Premacy automatic have a thrust-bearing?
Automatic models don’t have a clutch release (thrust) bearing because there’s no manual clutch to disengage. They do, however, have internal crankshaft thrust bearings in the engine and thrust-type bearings in suspension top mounts, but these are different parts and not part of a typical clutch service.

How long does a thrust-bearing last on a Premacy?
With sensible driving, many last well over 150,000–200,000 km. Lifespan depends on driving style and conditions—lots of stop–start or resting a foot on the pedal shortens it. It’s smart to replace the bearing anytime the clutch is out.

What noise points to a failing thrust-bearing?
A whirring, chirping, or squealing that appears when the clutch pedal is pressed, and often disappears when released, is the classic giveaway. If the noise is present with the pedal up, look instead at gearbox input shaft bearings or other rotating components.