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Gelbster · 07-26-2017, 07:45 AM

Brilliant research Markus.
The CH does nothing to solve the seal issue nor the out of round,nor the run out problems that bedevil the generic deep groove ball bearing for IMSB.
The surprising success of the modified roller bearing for IMSB may be that it is more tolerant of slight alignment problems.
If the original bearing has survived 100K miles, a generic 1RS $3 bearing would probably perform just as well. It would be more tolerant of clumsy Installation.
But without the results of a Pre-Qualification Inspection much of this chatter is meaningless.......
Anyway, it is easy to replace the IMSB whenever you replace the clutch (per Markus). So ultimate life span is a curious goal.
Minimizing the risk of premature failure with a more fault tolerant design - now that may be a more useful goal in the M96 real world. That is what an oil fed, plain bearing with all kinds of modifications achieves - at a price. But only if the engine passes Pre-Qualification.

07-26-2017, 07:45 AM	#17
Gelbster Registered User Join Date: May 2014 Location: S.California Posts: 2,029	Brilliant research Markus. The CH does nothing to solve the seal issue nor the out of round,nor the run out problems that bedevil the generic deep groove ball bearing for IMSB. The surprising success of the modified roller bearing for IMSB may be that it is more tolerant of slight alignment problems. If the original bearing has survived 100K miles, a generic 1RS $3 bearing would probably perform just as well. It would be more tolerant of clumsy Installation. But without the results of a Pre-Qualification Inspection much of this chatter is meaningless....... Anyway, it is easy to replace the IMSB whenever you replace the clutch (per Markus). So ultimate life span is a curious goal. Minimizing the risk of premature failure with a more fault tolerant design - now that may be a more useful goal in the M96 real world. That is what an oil fed, plain bearing with all kinds of modifications achieves - at a price. But only if the engine passes Pre-Qualification. Last edited by Gelbster; 07-26-2017 at 07:48 AM.