Edward

Hi all,

I need help on a set of p/ns for 993 rotors. I have an OEM box with the p/n of:
993.351.043.01
993.351.044.01
which according to my PET shows 993 rotors L and R.

So why do the actual rotors have stamped on them:
993.351.403.01
993.351.404.01
???

What's with the discrepancy? Perhaps they are superceded numbers? Someone please help me on this ...I hope I didn't get screwed on this. Thanks!!!

Edward

993inNC

My PET shows the 043 and 044 as the standard disk (front) and the 045/046 for the "Big Reds"

mcuozzo

Weird. The 403 and 404 part numbers, do not show up on Pelicanparts.com either. As you mentioned the 43 and 44 come up as the correct par number for the front rotors.

Maybe call your local porsche dealer's part department and see what they think of the 403 and 404 numbers???

kkim

Edward,

Where did you get the rotors from?

Edward

Hey guys,

Thanks for the responses. But like Chris', my PET shows the "043/044" numbers as the standard 993 front rotors. That's what has me confused as I haven't a clue as to what the "403/404" numbers mean. I know that on oil filters, the numbers had been superseded by newer ones (which is how you can tell if you've got some really old ones). I hope this is the case for the rotors I have.

I got them from a guy on Pelican ...a really nice guy, but more into 914s and these just ended up in his lap. So I looked at the label on the OE boxes ...looked good (with the 043/044 p/ns). Then I looked at the rotors and looked at the p/n stamped on the hub, saw "993.blah.blah.blah" and figured ok. But it wasn't until I got home and looked closely that the numbers caught my eye. As you can see, the numbers are so close I didn't realize at the particular moment of changing hands that they were indeed off by a smidge. So here I am. Help...

Edward

grmnxtc

Hans must have been lexdyslic that day?

Nothing in PET looks like the numbers you have

cabrio993

Maybe a different OEM Manufacturer? Like the mufflers?

How do they compare with the ones you have on the car now? Diameter, Rotor Thickness, hole pattern, etc?

mike cap

Edward,

You probably have the correct parts - meaning the p/n's on the cartons are correct. The part number that is either stamped or cast in the rotor(s) are most likely the internal Porsche p/n or vendor p/n to Porsche for the 'blank', before it is machined and "turned into" the part number for your car (the p/n on the carton).

You see this a lot on molded or cast parts that may have a variety of applications to different cars. The manufacturers sometimes call them "mold numbers" and the final (real) part number is usually added by a label after the machine work is done.

Perhaps a vendor you buy parts from could check a rotor with a the same part number (on the box) to see if the above is true.

Edward

Update all:

I called a dealer today and gave the parts guy the number off the rotor, and he such a number doesn't exist. After I explained the discrepancy of p/n on the box with the p/n on the hub, he then went on to say that a p/n stamped on a given part does not necessarily match the p/n on the box or in PET. As a matter of fact, the number on the rotor hub was probably a "casting number" for the rough part *before* it is turned into the final part ...exactly as Mike Cap said (you win, Mike ...next drink is on me!). Anyway, I just thought I'd share the news. Learn something new everyday, eh?


Edward

Air Kuul TT

Thanks for the update Ed... good to know these things.

BTW, I sent you an email.

Bull

If you look at the "number on a GT3 Cup engine case (at least in '01), you will find it starts with 964, which is the casting number.