mklein9

I voted yes but my case was that a PPI found evidence of an impending IMS failure (leak, and metal in oil filter) and it was replaced by the seller with the LNE upgrade, along with an RMS upgrade. So, the real poll answer is "Not failed yet but evidence of impending failure requiring replacement". Definitely it is not a "No Issues" answer.

-Mike

luvmy911

2003 996 C4S, currently 52,500 miles.

No issues but I pro-actively replaced mine with LNE at about 51k miles. My Indy said there was a leak coming from the area which I witnessed. When removed, the bearing seemed solid and fine.

ccaarmerciill

90k miles. Just replaced with LN engineering.
Dual row...

The factory original IMS bearing showed no wear, or play. Still gives a warm and fuzzy knowing it's replaced though.

Diemsea

Just purchased 02 996 C2 with 24K miles. Had the IMS bearing replaced with LN Engineering retrofit. OEM IMS bearing was in good condition.

rickgrande

Yes, mine failed at 74k miles. Putting in new engine w LN Engineering upgrade

0eemsC4

2001 C4. No issues. Went on the offense and at 70,000 miles did the LN Eng. bearing retrofit. Still no issues. Car kicks ***.

LI911

2000 C2 32K. Slight leak noted, upgraded to LN. Old bearing showed minor signs of degradation.

douglasf13

Bought '03 Targa with 83,000 miles in the summer of 2012 with a 3 year power train warranty. Indy inspected original bearing, and it is fine, but I'll likely put in the LN bearing before my warranty expires.

Cefalu

Wow. You mean your "Indy" removed the bearing, inspected it, then re installed the old bearing?

In order to inspect an IMS bearing, you would have to verify the bearing was still full of grease. The only way to do that is to remove the bearings grease seals which would destroy the bearing.

Thus, if your "Indy" inspected the bearing, he destroyed it then put it back in. It is good you have insurance.

mas05

68k miles on my 2004 40th I just bought. All paperwork indicates NO Replacement of IMSB, but RMS and Clutch was at 55k


cheers

KSR88

My 2003 C2 has 63k no issue to date. I do examine the filter when I change the oil.

douglasf13

Yikes, then I probably misunderstood him. The shop that I go to is Porsche specific, and it has been around for over 30 years, and I feel good about their work. He probably just meant that there were no signs of IMS issues, like bearing particles or whatever. Thanks for the clarification.

Cefalu

Without having removed the bearing and visually inspected it, the only other way you could conclude the bearing was "fine" would be to verify the engine actually runs, and I assume your Indy did that, and ensure that the oil filter was free of metal debris by cutting the oil filter up and visually examining the filter pleats.

If your Indy did not cut the filter up and examine it, then all you got was a verification the bearing had not failed because the engine still runs. If this is all you got, I would not assume the bearing was "fine".

Possibly a cam timing analysis on a program like Durametric could provide an indication of the health of the bearing by indication how close cam timing was. But I have not heard of anyone analyzing a bearing that way.

But you have insurance, and that makes it irrelevant.

Peter 642

At 40K with a 2003, and a needed clutch change I replaced my IMS and now have the comfort of mind that it will not implode. The original IMS was flawless and is now an expensive paperweight on my desk.

David Meads

So, what are the odds of getting one with a bad bearing? 100% 50/50? I am new as well but don't roll your eyes. This is a great form. I have always worked on my cars because I had to buy beaters. Never worked on a porsche. I'm not scared of basic stuff and some more technical repairs....but the IMS scares the crap out of me. I am looking at a 1999 911 Carrera 4. 24 service records and 1 owner. Previous owner replaced water pump, fuel pump, rear seals, window regulators, crank shaft position sensor in Nov of 2012. All done by the dealer that I talked to my self yesterday. But have not replaced the IMS.