Adrian

Dear Rich,
There are quite a few possible scenarios on how the LUK ended up on your RSA. Most likely was that it was fitted after delivery to the USA. Now the first customer may have insisted before personally taking delivery. Your engine could have been allocated to another 964 on the 1992 production line, it failed a quality test, was stripped down, repaired, the LUK installed for whatever reason and then this engine was re-allocated to your RSA.
Finding out would be almost impossible. I doubt that the records of such warranty work could be found anymore.
It was almost certainly not originally installed in this engine at initial production. It is far too early. Unless it was a test engine. One never knows and I am afraid we will never find out,
Ciao,
Adrian
911C4

PS: At least you do not have a flywheel problem to worry about.

Rich W

Adrian,

I will defer to your judgement, as your experience in this arena far exceeds my own.

This little mystery just makes the car that much more intriguing to me.

bmohr

I have a 1990 c2, 1992 engine and 993 (96) tranny. Is there anyway, beyond removing the tranny that I could tell(visually) what flywheel I have? I'm trying to put one less fear out of my mind

Earlydays

Starting with the 1992 model year the C2 had the updated LUK flywheel.

FeralComprehension

You'll have to search for confirmation, but I believe I've read that a) you can see the flywheel edge via a cutout in the bellhousing (my C4 does have this cutout; look below the clutch slave), and b) the earlier less-desirable flywheels have a welded-on ring gear (visible weld beads) where the newer ones have a pressed-on ring gear with no visible weld beads.

bmohr

i suspected this "window" to the flywheel. My 99 C4 had two so I figured this would be the case, but wanted some advice before I jacked her up this weekend. Thanks for the heads up and details FeralComprension.