Quote:
Originally Posted by Perfectlap
The % of failure is both inaccurate and almost irrelevant. If you have a 2001-2005 there is a very obvious flawe in the engine design. One that can be exacerbated by the stewarship, or lack of, by the previous owner if you're someone that purchased the car used. Porsche just settled claims for precisely these years. Generally big companies don't do something like this unless there's something in their own internal records confirming that a problem isn't a small % but well beyond the industry avearage for what is acceptable. Records from dealerships and engine replacement programs that would not play well before a U.S jury. Otherwise Porsche would have settled on all Boxster/Carrera claims, dual row bearings included. But they didn't -- just the single row. That's a point that shouldn't be lost on a single row bearing owner. Either are bad design but single is by far the worst. Just ask Porsche's lawyers.
So it's not a "just in case" retrofit, it's addressing a known problem now confidentially confirmed by the manufacturer. The IMS Guardian is probably good advice but since a clutch is not an item that's going to last forever a single row Boxster/Carrera owner would be wise to simply address the problem rather than waiting for a flawe to turn into game ender. Relying on unconfirmed, inaccurate and undisclosed %'s to any degree is questionable/shaky advice.
There are things you know (engine design flawe) and the things you don't know (% of IMS failures). I replaced a dual row bearing, but if I had a single row IMSB, I'd be swapping it out before the ink on that class action settlment check had even dryed.
p.s.
relying on the oil change filter inspection to detect IMS failure is like cargo inspection for narcotics at the U.S. Border.
The probability that a physuical search of every 100th car/container will land on the very car carrying drugs is a long shot.
You'd be quiet the lucky guy to be changing your oil just when the IMSB decided to let go.
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Again, this is just you opinion. You don’t know what the real failure rate is so how say that every Boxster with a single row IMSB should be replaced immediately. 99% of 986/996 owners do not post on forums and fair to say the only people that do post here and other sites about this issue either have had issues or have concerns. Scaremongers like you just feed the IMSB replacement industry (who also don’t disclose the condition of the bearings they replace). Does anyone even know if the LNE replacement is a permanent fix or will these engines need pulling apart in a few years too?
I clearly stated that I might get mine done when the clutch needs replacing for my peace of mind which you disagreed with. My car has done 80k, has an oil change every 5k miles and filter checked for particles, driven as recommended etc and had no problem with the engine exploding getting to work today or the previous 10 years for that matter. Porsche had to admit there was a design issue but only in the US due to the blame culture, they have not offered to modify every affected engine free of charge, have they? There may be a minority that continue to experience failures so every owner will have to weigh up the risks but there are things like regular oil changes that you can do to reduce it.
Toyota allegedly have a 3.7% catastrophic engine failure rate and other manufacturers have similar rates but you never hear the hysteria like you do on Boxster/911 forums (Honda are best with 1 engine failure in every 134 cars).