IMS Failure is not a Myth.

[MileHighBoxster]

Originally Posted by Series9

As the owner of an independent Porsche shop, I have to respectfully disagree.

This single VIN has experienced TWO failures in 118k miles.

All I can report is what I see. What I see is between 10 and 20 percent.

That is not only false, but irresponsible. My dealership, the largest/bussiest in the state, has never seen one. I guarantee they sell and service considerably more Porsches than any independent shop. You only see vehicles needing service. At 10-20% that would mean over 100,000 IMS engine failures between 1997 and 2007 and that is crazy talk. On this forum, with a high percentage of used Boxsters, we don't have anywhere near 2% and these are Boxster's only. You sir are incorrect.

[schnellman]

Originally Posted by MileHighBoxster

..... My dealership, the largest/busiest in the state, has never seen one. I guarantee they sell and service considerably more Porsches than any independent shop. You only see vehicles needing service. At 10-20% that would mean over 100,000 IMS engine failures between 1997 and 2007 and that is crazy talk. On this forum, with a high percentage of used Boxsters, we don't have anywhere near 2% and these are Boxster's only.

Thank you Mile High!! Finally, the voice of reason.

[Bengalfan]

I have a 2000 base, w/ 5-sp, and was looking to convert to a tip, so when I saw an '03 "S" tip at a local NWO auto dealer, I stopped to check it out. Had ~65k on it. Started it up and it sounded like lifters clapping, turned it off almost immediately.
What does the IMS sound like when it start to goes out?
This dealer (not Porsche) came back to me couple days later and told me he "drove it for 15-20 minutes and the sound went away".
I asked him was he nuts to drive it with that noise even 5 minutes would be crazy - and no, I'm not interested even dropping the $$ 3k.

[Perfectlap]

Two failed IMS in the same 911 engine?

Wow. Is that like getting attacked by a great white shark on Coney Island twice


Questions to anyone:

1-Have there been any recent IMS failures of LN IMS unit?

2-Have there been unusually high IMS failures in BSR/BSX Boxster spec racing?
I think of these cars because they are usually driven hard but not driven frequently, they must sit for long intervals.

[Jager]

Originally Posted by Perfectlap

Two failed IMS in the same 911 engine?

Wow. Is that like getting attacked by a great white shark on Coney Island twice


Questions to anyone:

1-Have there been any recent IMS failures of LN IMS unit?

2-Have there been unusually high IMS failures in BSR/BSX Boxster spec racing?
I think of these cars because they are usually driven hard but not driven frequently, they must sit for long intervals.

See Jake's post on this thread:
http://986forum.com/forums/general-discussions/33092-another-ims-solution.html

[Perfectlap]

Originally Posted by Jager

See Jake's post on this thread:
http://986forum.com/forums/general-discussions/33092-another-ims-solution.html

That little nugget (3 failures out of 4,000 IMS ugprades) deserves its own thread.

But my first question is how many of these egnines have seen siginficant mileage since most cars have had the upgrade in the only the last two years. But that's pretty theoretical because if you believe that an overwhelming majoriity of un-touched factory IMS bearings will not fail, then even if the LN turned out to have a high failure rate in the high single digits, sounds wholly unlikely though, you're still talking about a really tiny group. I mean how unlucky can you be?

But I'm curious to hear about the Boxster Spec racing IMS failure rates. I'll have to dig into those forums.
That's has to be a really well tested group to analyze. I think about the wide range of revvs rather than the vanilla revving from predictable highway driving.

[maj75]

Originally Posted by MileHighBoxster

That is not only false, but irresponsible. My dealership, the largest/bussiest in the state, has never seen one. I guarantee they sell and service considerably more Porsches than any independent shop. You only see vehicles needing service. At 10-20% that would mean over 100,000 IMS engine failures between 1997 and 2007 and that is crazy talk. On this forum, with a high percentage of used Boxsters, we don't have anywhere near 2% and these are Boxster's only. You sir are incorrect.

The small shop I go to has 12 failed IMS bearings sitting on their counter, maybe people just can't afford to have the work done at your dealership?