IMS bearing failure is a well-known concern in several Porsche models, particularly in vehicles like the Boxster, 911 Carrera, and early Cayman, where this critical internal engine component plays a key role in maintaining proper timing operation.
In many water-cooled Porsche engines, the factory-installed IMS bearing is sealed and receives limited lubrication, which over time leads to grease breakdown, increased friction, and internal wear—especially when oil change intervals are extended.
Early warning signs such as rattling noises during startup or metal particles in the oil can indicate developing issues, and if left unaddressed, IMS bearing failure can disrupt engine timing, cause valve and piston contact, and ultimately lead to complete engine failure with costly repairs.
Understanding which models are affected and why the issue occurs allows owners to take preventive steps, such as regular oil changes and upgrading to improved IMS bearing kits, ensuring better reliability, reduced risk, and long-term engine performance.
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