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99 Carrera engine serial number

Hi,

Just purchased a 99 Carrera with an engine supposedly swapped out in 2008. Can someone decipher the serial number for me?

M96 / 01AT66X67208

Thanks in advance!

Old 05-06-2021, 12:33 PM
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The "AT" indicates that it is a remanufactured engine (AT is an abbreviation of Austausch - German for Exchange); 66X says it is a 1999 Carrera engine; the M96/01 says it is 3.4L
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Old 05-06-2021, 01:21 PM
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I have one of those motors in my 99. It’s been great- only one minor issue after 30k track miles


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Carmine 1999 996 Carrera - White
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Old 05-06-2021, 05:09 PM
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Thanks for the detail!

Would a 2008 remanufactured 996 done in 2008 have the same IMS risks? Should the IMS be replaced?

Last edited by 99Carrera; 05-06-2021 at 05:48 PM..
Old 05-06-2021, 05:46 PM
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Nope. It has been factory resolved


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Carmine 1999 996 Carrera - White
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Previously:
The Vaporizer 2009 Carrera Metallic Black
Totaled by the Police: 2009 Carrera Black
Old 05-06-2021, 05:48 PM
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Quote:
Originally Posted by 99Carrera View Post
Thanks for the detail!

Would a 2008 remanufactured 996 done in 2008 have the same IMS risks? Should the IMS be replaced?
You cannot replace it; any remanufactured engine since 2005 has the oversized IMS bearing that cannot be changed without tearing the engine apart. You could, however, remove the flywheel side seal on the bearing so it is lubricated and cooled by the oil mist inside the engine cases.
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Old 05-06-2021, 06:29 PM
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Ok... confused now, If it’s the larger bearing, why pop the seal for oil mist. I’ve searched the forum but don’t see any definite info. I may start a new thread. Yup... ANOTHER IMS thread! ;-)
Old 05-07-2021, 05:55 AM
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Because you want it to live. Visit the guru on the subject LN Engineering
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Old 05-07-2021, 12:28 PM
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Copy that... Just scheduled a 90k service, clutch r&r, and IMS swap. Thanks again!
Old 05-07-2021, 02:02 PM
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Again, your IMS cannot be changed out without a total engine rebuild due to its size (it will not fit through the hole in the engine case); but they can remove the rear seal on the bearing so it can lubricate and cool. We have maybe 100 cars running this way, never had one fail.
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Old 05-07-2021, 02:24 PM
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The shop that did the PPI has quoted $2500 to replace it. I assume they know the engine spec, but will follow up with them to confirm. Will reply with their response. Thanks for the heads up.

Old 05-07-2021, 03:13 PM
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