Single row or double row?

[Ckrikos]

Not trying to scare anyone, but dual row bearings have failed too, though to a lesser extent.

[Meat Head]

Originally Posted by Ckrikos

Not trying to scare anyone, but dual row bearings have failed too, though to a lesser extent.

Lesser extent is an understatement. Less than 1% vs. 8-10%. There are many motors from many manufactures that have engine failures near 1%. And as for the argument that the more bearings mean more metal particles in your oil, not so much. If your double bearing is shearing off slivers of metal, it will totally fail at some point so I don't think this a big issue due to the less than 1% failure. With the current stats that Porsche has released, I think if you have a double bearing engine, you can rest easy! The double bearing engines are no more likely to have total engine failure than any other performance motor. I'll think about changing mine when I need a new clutch. Until then, I'm not going to give my IMS a second thought!:dance:

[darknight]

Originally Posted by Meat Head

Lesser extent is an understatement. Less than 1% vs. 8-10%.

I'm just wondering where the failure rate statistics are found? I have seen a lot of numbers thrown around, in regard to IMS failures, and they all seem like here-say.

Regardless of the actual numbers though, this is a well-documented shortcoming of these motors. And given the motor replacement cost, it almost seems like a no-brainer, to have this bearing upgraded, when it is either convenient or financially feasible, unless you are the gambling type.