Petza914

As Jake has educated me/us, the load on the IMS bearing is greatest at idle and low rpm, so it's not surprising the failure happened in neutral at idle coasting to a red light as that overloaded what was left of the bearing.

the_shansen

I just had the IMS bearing replaced in my 2005 C2 with 76k miles, and I kept the old bearing. The old bearing was still smooth rolling and looked great. It could have gone longer, but I wouldn’t have known that without pulling it.

LucV

2006 C2S 89,000km, no issues.

Wolfman928

08 - 997 Turbo, no issues, 72,000km

CBschnell

2006 C4S 37,000 miles - no issues

Jim Ciontea

2011 997.2 Cabriolet, 70,000 miles, NO FAILURE.

Are there some preventative actions I should be taking?

Carreralicious

997.2 doesn’t have an IMS. Porsche designed that out of the engine in 2009, so you’re in the clear. Only thing you need to be wary of is cylinder bore scoring which is less common in the .2 anyway so just drive and enjoy.

Jim Ciontea

Thank you.

Jim

Courtshark

07 cabrio, 77k miles, no issues,

Not sure why this is still a sticky since the only failures I've seen on here (admittedly didn't read all 73 pages) are early production 05s. So tired of hearing about this non-issue on later 997s as being something to watch out for. At this point, if it fails on your 997, either you've got an early production 05, it was a one-off defective part, or it's just worn out from use (or perhaps some weird oiling issue?!). YMMV

Petza914

Or it's used on the track at sustained high rpms where the bearing surface speed exceeds the larger bearing's design parameters.

Kenporsche997

This post helps to get other comments. I have a 2006 997.1S with 68,000 miles. I drive it on country roads the way we should drive a Porsche. This IMS bearing thing is on my mind to the point I'm thinking about getting a 997.2.

Fahrer

As you have the larger bearing in your car, I would not worry about it.

Courtshark

Are there confirmed cases of that being a consistent problem for anything besides early 05s? And track driving is a whole different animal; drive like a sport, pay like a sport. **** breaks on the track. Just part of the game. Note my avatar. I track a lot. If there's ONE report, or even three, of a track related IMS failure does not a systematic problem make. Failure is just as likely due to other unattended issues. Now if say 1 in 10 tracked 997.1s had an IMS failure on the track, I'd not track my 997. But the stats just aren't there. The IMSky isn't falling.

Courtshark

This nails it on the head, as does the prior comment demonstrate how awful this is. This feels like a sins of the father being visited on the son. The 997 IMS, after the early 05s, is flat out not anywhere near the issue it was for the 996s. Drive your car. Enjoy it. Keep your revs under 6k so when you go to sell it the other ******* crowd who freaks out about overrevs won't choke you. Or maybe just don't own a Porsche. They're designed to be driven, and hard. Ask Ferry (if you could).

pcaskey57

My car is up for sale and all I get is constant questions of whether or not the IMS bearing has been replaced yet. When I try to explain to people the failure rate of the larger IMS bearing in an '07 Carrera S is almost nil, these Internet savvy buyers think the car is expected to explode at any moment. I wonder if this sticky helps or hinders the truth behind the "larger single roller IMS bearing" Does anyone have even a remote idea what the actual failure rate is on this car? I'm so sick of arguing with idiots!