IMS Bearing Service Intervals for Porsche Boxster and 911 Models with the M96 Engine

The factory did not originally offer any replacement IMS bearings for the intermediate shaft nor did they offer tools, a procedure to change out the IMS bearing, or even a service interval for the original bearing.

It is widely acknowledged that the primary concern with the single row 6204 bearing is its limited load capacity. This issue is notably alleviated with the dual row bearing, given its double load capacity. The inclusion of a grease seal on the original bearing, although intended to mitigate issues, actually leads to reduced lubrication for the bearing. Consequently, vehicles subjected to infrequent use, inadequate maintenance, or short drives—especially in colder climates—are more susceptible to experiencing IMS failures.

Our insistence on adhering to service intervals based on either time or mileage, whichever occurs first, stems from the fact that the bearing lubricant (i.e., engine oil) is prone to contamination by water or moisture, as well as combustion byproducts. Such contamination significantly curtails bearing longevity. Astonishingly, a mere 0.002% water content can diminish bearing life by 48%, while a 6% water content slashes it by a staggering 83%—figures provided by the McNally Institute. This underscores the notion that letting your vehicle remain idle is among the least favorable practices, especially for the IMS bearing. Moreover, regardless of whether a ball or roller bearing is employed, oil contamination leading to corrosive wear will inevitably diminish the service life of any replacement IMS bearing, excluding the IMS Solution.

The selection of lubricants also exerts a substantial influence on the lifespan of your replacement IMS bearing. A40 oils tend to exhibit reduced levels of ZDDP anti-wear additives, and most contain only marginal quantities of active EP additives like moly, both of which have a direct impact on bearing wear. This is particularly pertinent for the IMS bearing, as a standard 0w40 oil typically boasts a viscosity of 12.9 cSt at 100°C—considerably lower than the recommended lubricant viscosity of 15 cSt for ball or roller bearings. Those utilizing Driven DT40 lubricant should experience diminished wear and extended usability for their replacement IMS bearing, surpassing those employing any Porsche A40 approved oil. Additionally, the use of Driven FR50 or DT50 ensures superior protection due to their typical viscosity index exceeding 17 cSt at 100°C.

The same principle holds true for your engine as well. Extended drain intervals and subpar engine oils can lead to engine deterioration. After the installation of an IMS Retrofit or IMS Solution bearing in your engine, the quality and cleanliness of your engine oil become critical factors affecting the lifespan of the bearing.

For optimal bearing longevity, it's imperative to use the appropriate engine oil and oil filter. Our endorsement is solely for the use of Driven DT40 engine oils for Porsche Boxster, Cayman, and 911 models.

Among the most prevalent causes of bearing issues is wear and pitting resulting from foreign particles, contributing to 70% of premature bearing failures. Given that the IMS Retrofit features an exposed bearing that relies on engine oil within the crankcase for lubrication, effective filtration becomes even more pivotal. Incorporating the LN Engineering Spin-On Oil Filter adapter is a strategic measure to prevent oil bypassing the filter, ensuring that 100% of the oil undergoes thorough filtration at all times. This adapter is recommended for every M96 engine.

The IMS Solution is equipped with a Spin-On Oil Filter adapter as a standard feature, offering superior engine oil filtration and simplifying the oil change process, presenting an additional advantage.

The IMS Solution is engineered to endure throughout the engine's entire lifespan and does not necessitate any specific service interval.

Conversely, the Dual Row IMS Retrofit™, Single Row Pro IMS Retrofit™, and RND RS Roller IMS Retrofit™ all have a service interval of 6 years or 75,000 miles, whichever comes first.

https://imsretrofit.com/service-intervals/

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