View Poll Results: Has YOUR car suffered an IMS failure
Voters: 1602. 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)
12-27-2015, 11:17 PM
#541
2001 C2, 93k miles, full maint history from previous owner. No issues, IMS bearing had not failed, but went ahead and replaced the IMS, RMS, clutch, flywheel, etc, so I could get it all out of the way at one time and just drive it.
01-08-2016, 03:52 PM
#542
8th Gear
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Replacing mine now - it is 2004 C4S 66k miles and I was leaking some oil - probably from RMS. I am replacing all and putting the LN Pro dual IMS bearing. No noise or metal in the filter but hate to drive and worry.
01-09-2016, 10:27 PM
#543
At 16k mi was replaced proactively, while under warranty by Porsche. 2004 C2 coupe. See comments below.
Last edited by ALEV8; 01-17-2016 at 05:33 PM.
01-11-2016, 09:03 AM
#544
To the best of my knowledge Porsche never proactively replaced a bearing under warranty. Either it failed and the motor was replaced or they wouldn't have touched it (under warranty).
01-17-2016, 05:32 PM
#545
"Intermediate shaft " was entered in Porsche Plano's service history for the vehicle at 16,000 miles. The service advisor ran down the history for me concerning a car I am purchasing.
01-18-2016, 08:39 AM
#546
The only related work I could possibly think of would be to change the seal from the original single ridge to the triple ridge, but on a 2004 it should never have had the older style seal on the IMSB.
It's always possible, but I've just never heard of them replacing the bearing like that under warranty. Either it wasn't touched or the the motor was replace as far as I know.
01-18-2016, 08:44 AM
#547
Drifting
01-21-2016, 08:02 AM
#548
Track Day
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Hi
I am in South Africa, and having recently purchased a 1998 996 tiptronic with 92 000 km (60 000 miles), i was anxious re the IMS issue. Imported a vertex fix kit and fitted it together with doing a transmission flush and change of filter.
Turns out the old bearing was perfect, looked like new, but peace of mind now.
Since then the car has a whining sound in neutral when stationary or in gear and moving. the sound rises with engine rpm.
What could this be?
I am in South Africa, and having recently purchased a 1998 996 tiptronic with 92 000 km (60 000 miles), i was anxious re the IMS issue. Imported a vertex fix kit and fitted it together with doing a transmission flush and change of filter.
Turns out the old bearing was perfect, looked like new, but peace of mind now.
Since then the car has a whining sound in neutral when stationary or in gear and moving. the sound rises with engine rpm.
What could this be?
01-26-2016, 10:19 PM
#550
Pro
1999 996 double row IMS failing with 75k miles
1999 996 double row IMS failing with 75k miles. It hadn't yet reached complete failure, but was almost there.
All the details are here:
https://rennlist.com/forums/996-foru...st-failed.html
The engine needed to be disassembled and flushed due to a bad water pump failure that circulated plastic impeller debris throughout all the coolant passages (I didn't want to take any chances). It was very fortunate that I was advised to do a full teardown in order to properly clean out the debris, because the builder found that one of the two rows in the IMS had failed, and the resulting metal debris was destroying the rest of the bearing, such that it was very loose. The metal part of the seal was still intact, but the inner rubber part of the seal was completely gone, so the metal was most likely mixed into the oil as well.
All the details are here:
https://rennlist.com/forums/996-foru...st-failed.html
The engine needed to be disassembled and flushed due to a bad water pump failure that circulated plastic impeller debris throughout all the coolant passages (I didn't want to take any chances). It was very fortunate that I was advised to do a full teardown in order to properly clean out the debris, because the builder found that one of the two rows in the IMS had failed, and the resulting metal debris was destroying the rest of the bearing, such that it was very loose. The metal part of the seal was still intact, but the inner rubber part of the seal was completely gone, so the metal was most likely mixed into the oil as well.
Last edited by jmj951; 01-26-2016 at 11:08 PM.
01-28-2016, 01:41 PM
#553
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Location: West Linn, OR
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I have a 2005 C4S and am deciding on if I should be proactive or reactive in the whole IMS issue. I typically do not "fix" things that are not broken- especially since so many have had it "fixed" just to fail later. But considering the car value to fix ratio and I think it may be a worthwhile investment....
01-31-2016, 01:52 PM
#554
I have a 2005 C4S and am deciding on if I should be proactive or reactive in the whole IMS issue. I typically do not "fix" things that are not broken- especially since so many have had it "fixed" just to fail later. But considering the car value to fix ratio and I think it may be a worthwhile investment....
Where are you getting your data that "so many have had it fixed to just fail later"? For cars that got the IMS retrofit done at an approved installer, I believe the amount that failed later is extremely small.
01-31-2016, 03:48 PM
#555
Former Vendor
We've performed near 600 IMS Retrofit procedures, including the very first one. To date we've maintained a perfect score without a single post- process failure.
The issue has been shops not pre- qualifying engines as well as engines being retrofitted after a bearing has already failed.