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IMS question

 
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Old 03-19-2019, 04:31 PM
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IMS question

I am looking at a 2004 C4S that claims does not need IMS replacement according to vin number.

First was there a factory fix for the IMS?

Second what was the earliest vin that the factory repaired the failing IMS for the C4S?

Thank you,
 
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Old 03-24-2019, 10:04 AM
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Originally Posted by Max (SD) View Post
I am looking at a 2004 C4S that claims does not need IMS replacement according to vin number.

First was there a factory fix for the IMS?

Second what was the earliest vin that the factory repaired the failing IMS for the C4S?

Thank you,
Be careful going by the VIN. It would be better to get the engine serial number. Your motor could have been swapped out with the latest large ceramic M97 bearing. If that's the case, I wouldn't swap the bearing out. If it's the original engine, then you'll have the most failure prone of all three versions of the M96 bearing - that is, the small single row bearing. These are the worst of the bunch.

 
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Old 04-08-2019, 10:09 AM
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Having had an IMS failure about a year ago, despite an LN replacement 50K miles back, this is my take: If you get a good deal on a 996, budget $2k for a replacement and have it done at a shop you trust after you buy it.
At present values, a 996 is a good investment.

I drove mine for 110K miles ( bought with 30K on the odometer ), and when the IMS failed with no warning, at 140k , I liked the car so much I placed a rebuilt engine at $24K and just decided to keep it forever.
( If the shop had registered the LN IMS replacement, I would have been able to get them to cover at least some of the cost.)
 
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Old 04-29-2019, 10:40 AM
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If you have a factory rebuilt engine, it will have the letters AT in the serial no. If it is the original engine, I would consider using the LN IMS Solution which converts it from a sealed ball bearing to a pressure fed bearing like the main and rod bearings. I did this conversion to my wife’s 2003 996 C2 last year as soon as we purchased it. I have been very happy with it. I have the LN ceramic bearing in my 2001 996. It was installed by Flat Six in 2015. I just purchased an IMS solution to install in the 2001. I wanted it initially but it was not available for the dual row bearing back in 2015. Installation was very straightforward but I welded a crowsfoot to the socket used to torque the nut so I could use a screwdriver to hold prevent the stud from turning.
 

Last edited by 168Sierra; 04-29-2019 at 11:16 AM. Reason: Correct term stud to nut
 
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