IMS Bearing, I'm a 99 Percenter
2000 S with 113K.
I replaced the clutch and while there wanted to deal with my IMS bearing fears. I had read somewhere, maybe of this forum, that the true failure rate on the dual rows was ~1%, and the single row 10%. I do not know if this is true. However with the cost of failure being so high, I went with the LN pro solution. Bottom line, the factory bearing was in great shape, I replaced it anyway. |
IMS Bearing
According to the articles that I have read, those numbers are commonly quoted. At the end of the day, is the incremental cost of the IMS bearing upgrade worth the "peace of mind" to you?
Personally, I would do the upgrade vs risking grenading the engine and dealing with a much much larger repair bill... Also, from a resale perspective, knowledgeable buyers will pay a premium for an IMS upgraded car or at least consider purchasing it because it had the upgrade addressed. |
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did you have a single or dual row in there once it was removed?
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My 2001 Boxster S has 111,000 miles on her. If, IMS failure was going to happen, it happened long ago and I've no record of that from past owners. There was an issue early on. An issue so severe that there was a class action lawsuit. But, most of them happened below 40,000 miles. If you drive a Porsche like a Volvo expect problems.
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I recently bought a replacement 2.5L with 84K miles on it the listing said "it has already the IMS updated to the new Porsche factory IMS." What does this mean to me? Am I safe to not replace the current IMS? |
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http://highspeedfotos.de/Coppermine/...s/IMG_3697.jpg |
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Seals in high mile cars with frequent oil changes degrade much more slowly, which gives rise to the myth that once you past a certain point your IMS won't fail. Nevertheless, they still degrade. Eventually, these cars will see their IMS bearings fail. For this reason, one should change the bearing at the time of a clutch changes and leave the outer seal off. |
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Does this mean the Tip is less susceptible to a failing IMS? Thank you. |
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General consensus all over the internet seems to corroborate what the mechanic told him; if your IMS hasn't failed by xx miles (I've read anywhere from 60k to 75k) then it's very unlikely it WILL fail. I value your knowledge, as it's based on real experience, rather than just what I've read, haha. Can you tell us what's behind this idea, and what your own experience says are real factors? Sent from my SM-G930T using Tapatalk |
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On the basis of this experience, I don't see a mileage relations relationship. Other shops may or may not have had a different history, but we don't go by unconfirmed chatter off the web, I can only speak for what we have seen. |
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And the delineating line for when a shingle row was used, rather than the dual row? Do I understand this happened mid - year '02? Sent from my SM-G930T using Tapatalk |
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I've heard the mileage failure rate nonsense for years and have always quickly dismissed it as it's just counterintuitive to common sense, or at least to my limited version of "common sense". I'd agree that low use cars (and bearings) are (or can be) subject to failure for many understandable reasons, but the logic of thinking "I've made it to xx,xxx mi without issue, so I don't need to worry about it" is just plain dumb. It's a bearing, under load and with friction...it will fail; and the longer the bearing is subjected to wear, the greater risk of failure.
To use an analogy...let's say that you purchased tires that you discovered had a known design failure and that you had heard that the failure *usually* happened under 1,000mi...if you continued to use such tires, would you think "I've made it to 50,000mi, I guess my tires are good" and continue to blissfully drive along? Of course not. Tires wear, and the wear is visable. Just because a component is buried deep and out of sight doesn't mean wear isn't slowly degrading the functionality and shortening the lifespan. I can understand trying to find comfort and console in a belief to to mitigate fear, but those who wish to follow the "high mileage IMSB" preachers are *ahem* delusional. Please accept my most sincere apologies if I have offended, but please, don't just believe something because you want it to be true. Of course, I am fully open to meaningful contradiction. My complete and total wrongness on any given subject only leads to a learning experience. ;) |
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