Which component's rattling serves as a telltale sign that the sleeve bearing needs oil?

• A. Slap
• B. Slinger
• C. Rattle
• D. Chatter

Answer: (B)

When a sleeve bearing isn’t getting enough oil, the system that helps deliver lubrication to that bearing is the slinger. The slinger is mounted on the rotating shaft and uses centrifugal force to fling oil from the crankcase onto the bearing surfaces. If the bearing is dry or oil delivery is insufficient, the slinger can begin to vibrate or move imperfectly, producing a noticeable rattling sound. That rattling serves as a practical warning that lubrication to the sleeve bearing is lacking and needs attention—oil level, oil delivery paths, or the slinger itself may require inspection or replacement.

Other noises like a slap, generic rattle, or chatter don’t tie as directly to the lubrication path for the sleeve bearing, so they’re less reliable indicators of an lubrication issue.