rodH

So if it has been "only" 8% (which is actually a really high number, of course), would it seem plausible then that the vast majority (nearly all) of the IMS failures would happen with people who:

1. Never change their oil, or go far beyond the recommended mileage?
2. Use non-approved oil?
3. Use inferior oil filters?
4. Low oil levels (never checking and topping off)?
5. Didn't use proper warm-up procedures?
6. Significant over-revs?
7. Wrong oil viscosity?

ETC....

not saying that the IMS issue would NEVER happen with proper care, as we have seen examples on this forum that have, but it seems like there are far more than 8% of the 911 population that would actually NOT follow all of the above guidelines that we tend to use. Which to me, means that the number, if proper protocol is followed, is actually MUCH less than 8%

Sorry to beat a dead horse, just some random thoughts I was having today

Thoughts?

Bruce In Philly

Please state your source for the "Porsche says 8%".

Why do you point to oil as the main issue?

Peace
Bruce in Philly

pavster

Yeah I want to see source too. Admission to having an 8% with issues would open them to a HUGE lawsuit.

Also don't agree on oil/maintenance being the issue. The bearing is sealed. It fails when its internal 'lifetime' lubrication fails to do its job. It's a design issue - using a bearing with lifetime/stress tolerances shorter/lower than it's subjected to in real life.

rodH

Isn't this the number that Porsche mentioned or maybe it was the attorneys in the class action lawsuit? I have read numbers that vary from 8-10% in several articles and youtube videos, but don't really have those on hand to post links at the moment.

vern1

Oh jeezus man.

You quote Porsche as the source of this number and then when asked for a source, you ask yourself for the source??

rodH

A quick search gives me these results.

There are plenty more but got tired of cutting and pasting

http://theimssolution.com/ims-101/

http://www.revolution-porsche.co.uk/upgrades/single-row-pro-ims-retrofit-installation-from-revolution-porsche

http://porsche911owner.blogspot.com/2013/10/porsche-ims-engine-failure-risk.html?m=1

Abe Froman

You people need to learn Google

https://www.oregonpca.org/wp-content.../ORPCA-IMS.pdf

"According to information published about the Eisen IMS Class Action Lawsuit, the single row IMS bearing used in 2000 through 2005 model years is reported to have an 8% failure rate, versus less than 1% with the dual row IMS bearing. The 8% failure rate cited by the settlement documents is not far off of the calculated L10 life LN Engineering has been using for the last five years!."
Sooo.....Also answers the OP's question. 1% of "normal" bearings fail. Subtract 1 from 8 and add a variance of 2% and you have a 5%+ failure for IMS.

rodH

i was kind of suprised to get all the 🔫 Replies as I thought this was a fairly well know stat.

It sounds like the oil doesn't really have much to do with it anyway, so I guess that in that sense this thread is useless?

Sneaky Pete

BINGO!!

Bruce In Philly

The stat only relates one type of failure over a specific set of years. Your comment and then points appear fairly random, and to be honest, smells a bit of a troll post.

Folks here I suspect have some fatigue on this issue but to be fair, it still looms large and relevant. Throwing out comments about oil and abuse all in the same post appears... well.... pretty darn hard to respond to your post given the years of thoughtful analysis by technicians and owners who had failures (includes me).

Peace
Bruce in Philly

TonyTwoBags

please rename thread to "question that quickly turns into faceplant"

vern1

I love rodH threads and anything like "will brake dust on my rotor cause my car to spontaneously blow up if I drive it"

As they say on Seinfeld, its gold Jerry, GOLD

gpjli2

OP wants to believe that if he changes the oil on his 997 he has no need to worry about engine failure. Dream on guy. Ask me how I know, or better yet, don't.

Own Goal

Don't think OP is trolling. Also does not say he has a 997 yet. It's a lot of money and a decision that requires some judgement to assess.
I suggest he read a LOT. The L&N guys have offered to share a lot of info on here.
On the other hand if need to see what first class trolling looks like, come on up to P&C anytime and get an education on that topic.

Jack667

Most of the threads that talk about engine failures and most that mention Raby, LN, Hartech, etc - talk about the importance of changing oil often. And we all know people get religious about what oil to use. And the importance of oil analysis, and magnetic drain plugs, and on and on.
Why is it so crazy for someone to take the logical leap to say that NOT doing those things would cause trouble? Heck - it's all over this forum already. If you want your engine to last longer - do A, B, and C. If you don't do those things, would that not put you at greater risk?
We know many of these cars are leased or owned by people too carless to bother with certain oils, or oil interval, etc. How many people are careless with their oil? 3%, 5%, 8%, 20% ??
Why is it so crazy to think that some number of failures are related to those careless owners?

I'm not saying he's right, but I don't think it makes any sense to berate him, given all the "information" on this and other forums.