Dennis "N" SC

I have a 04 996 Carrera. Can you tell by the year if it has single or double IMS bearing?
Thanks guys.

996pp

I believe the double row only came on the 99 and 00 models.

tokyopav

My understanding is there are three types of bearing. I have a 2003 and would be interested in knowing which one I have but I think after 00-01 it's not a fixed equation on what we have. I could be wrong though.

fpb111

2003 & 2004 definitely single row OEM. 2002 thru 2008 single row. 2005 started change to larger single row that is in 2005 - 2008 (2005 seems to be running change)

Cuda911

We need Jake to chime in here. It's my understanding that you can't tell whether you have single or double row until you actually take it out to look. I've heard that single and double have both been used in nearly all years.

Jake, what's the poop on this?

DaveCarrera4

. Not what I've heard. Double row in MK I only. Reminds me of the 356 threads, where Porsche "used up prior year parts into a new model year design", and the endless debates about which way should I do my restoration...ha ha

2003 Carrera 4S Speed Yellow / 1955 356 Continental 1500 Rust Red

relinuca

Porsche changed over to the single row IMS based on engine #s, not VINs. Specifically, Boxster engines to 671.12851 (M96.22) and 671.11237 (M96.21) and 996 engines to 661.14164 are double row. Some late MK Is may have a single row IMS bearing.

The revised/iupgraded intermediate shaft was introduced during the 2006 model year...must inspect IMS flange to discern new design.

relinuca

JMLavoie

Relinuca: Your post is worth much more than 2 cents.
Best answer on M96 vs IMS types I have seen in a long time. I would bet you are very close to the truth, here.
I would also bet there are very few 2001 996.1 VINs with the single row, which is prevalent throughout all 996.2s (02 to 04). It gets more confusing for the early 997s as the M96 engine was used for these early VINs, so it would be interesting to get your theory validated here as well.

Dinicod

Ok, stupid question of the year??? But how do you easily tell what the engine # on your car is (besides the stamp on the motor, which I don't know how to find on this car anyway)?

JMLavoie

Check this link: http://www.renntech.org/forums/topic...erial-numbers/

JMLavoie

This picture might help as well:

thirteeneast

Damm, Thats clean.

alpine003

Because its a new manufactured engine.

relinuca

Great pic from alpine003 in re. location of engine serial #. As most readers will have surmised, Porsche relies on engine #s rather than VINs under some circumstances because some number of 996s and Boxsters have been subjected to engine changes.

I have read somewhere that Porsche "re-manufactured" in Stuttgart some portion of those engines swapped out under new car warranty coverage, and such repaired engines then re-entered the parts pipeline. (If true, I wonder if these reman'd. engines were re-stamped with a new serial #. Hmmm)

relinuca

alpine003

I didn't post the pic but I meant to say "remanufactured" in my previous post as it has the "AT" designation in the engine serial number. To my knowledge, all the remanufactured engines from Porsche in the US has the "AT" designation.