View Poll Results: Has YOUR car suffered an IMS failure
Voters: 1591. You may not vote on this poll
IMS bearing failure for your 996, Y or N? tell us (yr, 996 Mk1 or MK2 failure mode)
05-07-2013, 11:24 PM
#151
2002 996 w/ 31k mi. Replaced original IMSB with LN for piece of mind. RMS was leaking so this is why I decided to do the job. Original IMSB was ok and makes a great paper weight on my desk now. 500 miles on new LN IMSB and RMS.
05-08-2013, 01:45 PM
#154
Rennlist Member
I had read enough IMS failure horror stories that I felt compelled to have the original IMS bearing on my '04 40th anniversary edition replaced with the LN ceramic bearing. Since the car now has a little over 69K miles I thought that I'd replace the clutch, too. When I took the car in to have both of those items replaced (as well as the RMS), I got a call from the repair shop and they told me that they'd done the IMS and RMS replacement, but in good conscience they couldn't replace the clutch and/or flywheel because they were in phenomenal condition. They said that the clutch disc measured 8.27mm and a new disc measures 9mm, and that they don't usually replace them until they're at 7.5mm. They also said that the dual mass flywheel was in great shape. For what it's worth, the original RMS was starting to be compromised but the original IMS bearing was in good shape. At least I now have peace of mind relative to the IMS issue.
05-10-2013, 07:51 AM
#155
Drifting
Join Date: Sep 2011
Location: Ephrata, PA, USA now. Originally from the UK
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1999 C2 Cab with duel row .. 64000 miles. All Original.. I have read 10 pages and find 2 legit failures. The rest had them changed proactively and found bugger all wrong with the ones they changed. That makes me feel real good. I have no intention of changing the one that came with my engine. Not even if I have to have a clutch changed (which I very much doubt, as I know how to drive a manual car correctly). Theres no guarantee the LN replacement WONT fail. Lets see how many of those fail 10 years from now as a previous poster pointed out. Sitting pretty here eating my pop corn haha 
I don't know where the 19 fails in 211 posts come from at the top of this page???????????????????????
To my reckoning 2 failures in 154 postings makes a little over 1% so far. A far cry from the 5 to 10 percent claimed by the scare mongers. UNLESS people simply clicked into the fail or not button at the start of the thread and didn't bother to post. That to me just does not make any sense at all.
I don't know where the 19 fails in 211 posts come from at the top of this page???????????????????????
To my reckoning 2 failures in 154 postings makes a little over 1% so far. A far cry from the 5 to 10 percent claimed by the scare mongers. UNLESS people simply clicked into the fail or not button at the start of the thread and didn't bother to post. That to me just does not make any sense at all.
Last edited by Hurdigurdiman; 05-10-2013 at 08:08 AM.
05-10-2013, 10:14 AM
#156
Parts Specialist
Rennlist Member
Rennlist Member
its the internet - it doesnt have to make sense
the poll is interesting, I have refrained from commenting as the OP asked that this NOT be a comment thread or a debate, just post facts - fact is I am a little surprised but also know that many people who have cars and are not regular talkers on here find it easy to click a button...and not say much
we call them lurkers
they still have a voice
lets keep this just factual (as can be) and if you want to debate, just dig up an old thread...there's plenty of them - most regulars wish you wouldnt though - just saying
the poll is interesting, I have refrained from commenting as the OP asked that this NOT be a comment thread or a debate, just post facts - fact is I am a little surprised but also know that many people who have cars and are not regular talkers on here find it easy to click a button...and not say much
we call them lurkers
they still have a voice
lets keep this just factual (as can be) and if you want to debate, just dig up an old thread...there's plenty of them - most regulars wish you wouldnt though - just saying
05-13-2013, 07:29 PM
#158
1999 C2 Cab with duel row .. 64000 miles. All Original.. I have read 10 pages and find 2 legit failures. The rest had them changed proactively and found bugger all wrong with the ones they changed. That makes me feel real good. I have no intention of changing the one that came with my engine. Not even if I have to have a clutch changed (which I very much doubt, as I know how to drive a manual car correctly). Theres no guarantee the LN replacement WONT fail. Lets see how many of those fail 10 years from now as a previous poster pointed out. Sitting pretty here eating my pop corn haha
I don't know where the 19 fails in 211 posts come from at the top of this page???????????????????????
To my reckoning 2 failures in 154 postings makes a little over 1% so far. A far cry from the 5 to 10 percent claimed by the scare mongers. UNLESS people simply clicked into the fail or not button at the start of the thread and didn't bother to post. That to me just does not make any sense at all.
I don't know where the 19 fails in 211 posts come from at the top of this page???????????????????????
To my reckoning 2 failures in 154 postings makes a little over 1% so far. A far cry from the 5 to 10 percent claimed by the scare mongers. UNLESS people simply clicked into the fail or not button at the start of the thread and didn't bother to post. That to me just does not make any sense at all.
05-19-2013, 01:30 PM
#165
4th Gear
Join Date: May 2013
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So, unfortunately yes, mine (2003 C4S coupe) just failed this past Thursday while on the freeway in slow traffic. I've only had the car for 3 months. It's in immaculate condition, never tracked with 31k on the clock. The car is at my local shop, and I'm debating what to do this weekend. Also, there was no indication that this was about to happen, the engine was bone dry underneath and the PPI came back with flying colors.
Incidentally, I did not burn my engine up. Oil is still in the case, there was no leaks. but with the sound coming from that bearing and gold metal flakes in the oil, it was determined to be the IMS. My shop gave me two options. 1. pull the engine and transmission, just replace the failed part with the more reliable aftermarket one, add a different type of oil filtration system (non-bypass) and flush the engine. (no engine guarantee)
2. Complete engine tear-down. Much more $$$$$$$. (recommended)
I'm inclined to go for option 1. mostly for lack of funds, and also because I don't see myself keeping this car for ten years+. If the car was more collectible, maybe. But throwing huge amounts of money doesn't seem to make sense. Unfortunately, the car is absolutely pristine with low miles, which is making the decision slightly more difficult. I paid top dollar for the car, more than the going rate, because of its 'show-room' condition.
Does anyone have any thoughts on how reliable option 1. will be for me, considering that my shop won't guarantee this route?
Also, as the third owner of this car, would I be a candidate for the lawsuit against Porsche for what is clearly a design flaw in the motor?
Thanks.
Ingiro
Incidentally, I did not burn my engine up. Oil is still in the case, there was no leaks. but with the sound coming from that bearing and gold metal flakes in the oil, it was determined to be the IMS. My shop gave me two options. 1. pull the engine and transmission, just replace the failed part with the more reliable aftermarket one, add a different type of oil filtration system (non-bypass) and flush the engine. (no engine guarantee)
2. Complete engine tear-down. Much more $$$$$$$. (recommended)
I'm inclined to go for option 1. mostly for lack of funds, and also because I don't see myself keeping this car for ten years+. If the car was more collectible, maybe. But throwing huge amounts of money doesn't seem to make sense. Unfortunately, the car is absolutely pristine with low miles, which is making the decision slightly more difficult. I paid top dollar for the car, more than the going rate, because of its 'show-room' condition.
Does anyone have any thoughts on how reliable option 1. will be for me, considering that my shop won't guarantee this route?
Also, as the third owner of this car, would I be a candidate for the lawsuit against Porsche for what is clearly a design flaw in the motor?
Thanks.
Ingiro