View Poll Results: did YOUR car suffer an IMS failure
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IMS failure for your 997 car, Y or N? tell us (yr, 997.1, .2, m96, m97, failure mode)
#1067
IMS failure. 2005 C2 (November 2004 build), failed at 68k miles after 51.5 months. After 2 months of complaint and negotiation with Porsche NA, we split the cost 25/75 (me/Porsche) on a new crate motor and labor. This was before the lawsuit. Another 2 months to ship and install by the dealer. Crate motor has the larger single-row IMS.
I still have the car, now 9 years after the failure with 156k miles on the chassis (88k on the crate motor). Normal wear and maintenance.
I love the 997.1 with its lighter chassis and hydraulic steering assist - destined to be a classic in my opinion. It's been my daily driver and occasional auto-x car for 16.5 years. Low cost of ownership. More reliable and has out-survived all other family cars (Audi, BMW and VW).
Keep the motor under 4000 RPM until OIL temp is completely warmed up. I use Motul 8100 X-Cess 5-40W, FWIW.
Although the failed IMS was a huge aggravation and I had lost confidence in the 997.1 at the time, in hindsight the failed IMS was good fortune. I received a new crate motor (effectively a new car) for a mere $6k after 5 years of hard driving. The new IMS has more than proven its reliability.
If I were to buy a pre-2006 997.1 today (with the smaller factory IMS bearing), I would factor in the cost of a LN Engineering IMS upgrade into the purchase cost. No hesitation.
I still have the car, now 9 years after the failure with 156k miles on the chassis (88k on the crate motor). Normal wear and maintenance.
I love the 997.1 with its lighter chassis and hydraulic steering assist - destined to be a classic in my opinion. It's been my daily driver and occasional auto-x car for 16.5 years. Low cost of ownership. More reliable and has out-survived all other family cars (Audi, BMW and VW).
Keep the motor under 4000 RPM until OIL temp is completely warmed up. I use Motul 8100 X-Cess 5-40W, FWIW.
Although the failed IMS was a huge aggravation and I had lost confidence in the 997.1 at the time, in hindsight the failed IMS was good fortune. I received a new crate motor (effectively a new car) for a mere $6k after 5 years of hard driving. The new IMS has more than proven its reliability.
If I were to buy a pre-2006 997.1 today (with the smaller factory IMS bearing), I would factor in the cost of a LN Engineering IMS upgrade into the purchase cost. No hesitation.
#1068
05 C2 33k miles no IMSB issues. My is a early model 10/04 built which is in the high risk category. ( 99.9 % sure smaller single roll bearings) I have read every page on here on this topic. Seems to have been more of a panic at first then at the present time, Year 10-15 compared to current year 16-19. I am looking forward to the LN solution replacement when doing the clutch but problem is clutch is solid with no signs of slippage or tightness. I’m hoping to hold off another 2/3 years 20k miles or so and get both worked on and replaced.
Am I crazy to wait ?
any thoughts?
Am I crazy to wait ?
any thoughts?
The small IMS bearing has an estimated life of about 50k miles depending on maintenance and driving style.
If you intend to keep your car for a long time, I'd do the LN Engineering solution and drive the car hard or race it without worry.
Then again, if you don't drive the car hard and fully warm up the oil before taking it over 4000 RPM, wait until the odometer reaches 50k miles to replace the IMS. My C2 (Nov 2004 build) IMS bearing failed at 68k miles and 51.5 months (see my post elsewhere in this thread). I autocross my car. :-)
Last edited by useridchallenged; 04-22-2021 at 03:58 PM. Reason: more detail about cost of IMS failure
#1071
Have 10 hours on your hands to watch all the content, though.
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#1079
IMS Failure 90K, 2005 997.1 M96.05 Single Row
2005 997.1 M96.05, IMS failure around 90K. Failure happened in neutral coasting to a red light. The engine turned off with no load, made it to a parking lot, towed home and removed filter. Failure was determined via engine oil filter inspection. Everything was normal, no prior issues. Changed oil every 6 months. I owned for 1.5 years prior to failure. Once the engine was removed and disassembled, the single row bearing was the root cause. No other damage to engine besides the IMS housing gear, bearing itself, and IMS/Crank chain guide. All other components looked normal.
#1080
Failure happened in neutral coasting to a red light. The engine turned off with no load, made it to a parking lot, towed home
I state what you said above, and then the phone goes quiet.. They pack the car up and send it on, since I just blew their mind. I just did it last week!