Parts for your 2018 Mazda Cx-5-Thrust bearing

2018 Mazda CX-5 thrust-bearing — what it is, where it is, and how to look after it

Yes, a thrust bearing is relevant to the 2018 Mazda CX-5. Technical sources such as the Mazda Workshop Manual for the CX-5 (KF) Engine Mechanical sections and the Mazda Electronic Parts Catalogue confirm the engine uses a crankshaft thrust bearing integrated into the main bearing set. On variants with the 6‑speed manual, the clutch release bearing (often called a thrust bearing) is also fitted in the clutch housing. Automatic models don’t use a clutch release bearing, but they still rely on the engine’s crankshaft thrust bearing.

Purpose-wise, the engine’s thrust bearing controls end float — the fore‑and‑aft movement of the crankshaft — keeping it centred under loads from the accessory drive, torque converter or clutch. Without it, the crank could “walk”, upsetting oil clearances and chewing out components. On manual models, the clutch release (thrust) bearing lets the pressure plate disengage smoothly when the pedal’s pressed, reducing noise and wear while changing gears.

There’s no routine service interval for the engine thrust bearing, it’s designed to last the life of the engine if oil changes are done on time and the vehicle’s not been abused. Workshop checks noted in the Mazda Workshop Manual include measuring crankshaft end play with a dial gauge if there’s reason to suspect wear (for example, after clutch or transmission work, or if abnormal noises appear). The Mazda Parts Catalogue lists graded main bearings with thrust faces, which a technician selects during bottom‑end service or an engine rebuild.

• Common signs of engine thrust bearing trouble: metallic scraping under load, the crank pulley or flywheel showing unusual fore‑aft movement, or low idle changes when the clutch is depressed (manuals).
• Common signs of a worn clutch release (thrust) bearing on manuals: chirping or rumbling when the pedal is partially pressed, a notchy pedal feel, or noise that changes as the pedal travel changes.

Replacement of the engine thrust bearing is a professional job involving sump removal and main bearing service, correct bearing grade selection and cleanliness are critical (as detailed in Mazda’s engine mechanical procedures). For manual models, the release bearing is typically replaced whenever a clutch kit is fitted, as recommended by Mazda service information, because access requires gearbox removal and the bearing is a known wear item.

Good habits help: use the correct engine oil, avoid resting a foot on the clutch pedal, and if any of the above symptoms show up, organise an inspection before more costly damage sets in.

Popular questions about the 2018 Mazda CX-5 thrust-bearing

Does every 2018 CX-5 have a thrust bearing?
Every CX‑5 engine has a crankshaft thrust bearing built into the main bearing set (per Mazda Workshop Manual and Parts Catalogue). Only the manual transmission models have a separate clutch release (thrust) bearing, automatics do not.

What are the symptoms of a bad thrust bearing on a CX-5?
For the engine thrust bearing: scraping noises when loads change, visible fore‑aft movement at the crank pulley/flywheel, or idle speed affected when the clutch is pressed. For the manual’s release bearing: chirp or rumble when the pedal is partially depressed and a rough, notchy pedal feel.

When should the thrust bearing be replaced?
The engine thrust bearing is replaced during bottom‑end repair or a rebuild, or if end play is out of spec as checked per the Mazda Workshop Manual. The manual’s release bearing is normally replaced with the clutch kit because labour access is the same and the bearing is a wear item.