calif phil

How can I ID an original L82 camshaft.? I pulled the cam out of my 73 L82 motor today and I want to make sure that it is the original cam. There was some pink paint on the rear of the cam and some casting numbers but no casting part numbers to go by.
Thanks,

Al Davis

Hello, I purchased a new GM L82 cam also known as a GM #3896962. You can find more info by using the search option.

73StreetRace

I'm just wondering the same thing about mine. I didn't remove it. Only the sprocket. It should be a L-82 cam, but there are no casting part numbers either :

calif phil

Thanks for the info Al. I did do a search but never did find a way to ID the cam I pulled out.
73Streetrace I also read where the stock cam might have a vertical Diamond in the casting. I have no idea if it's true but it might not hurt to pull yours and have a look.
Mine is at the machine shop and I am going to ask them to look for the diamond today.

73StreetRace

Thanks for the info.
It might interest me if you know where this diamond is... especially if it's a real one

MelWff

If your cam is at the machine shop they can put a micrometer on the cam lobes and see what the lift is. The L82 should have .3 on the intake and .306 on the exhaust. Those are the actual lobe numbers. The stock rocker arms end up giving you .450 and .460

Al Davis

Hello,I have the cam and no markings on the front face of the cam. There are some light stampings on the rear face which are: 115840 & 371328 and a USA. This cam is a GM L82 that I bought two years ago. Might have different markings on the original? See ya, Al

jackson

virtually all SBC flat tappet cams are cast iron and .... they all share the same casting CORE ... universal cores; then lobes & journals ground, gear cut, etc... all I've seen have the diamond which is, I think, the logo for ubiquitous manufacturer-supplier "DANA" ... seems like division was "CMC" ??? ... anyway, diamond don't mean L82 specific.

best bet: measure several lobes.

exceptions to sharing universal cores are some of the 4-7 etc swap cams.

*everything on internet's suspect; including the very words I just wrote.

73StreetRace

Here's what Lars told me about the casting markings :

"Camshaft ID markings and part numbers are normally located on the rear surface of the cam - not visible unless you pull the cam out.

Lars"

79blue

I have my 79 cam infront of me (assuming it's the original). starting at the end without the steel tip the marking are-on the flat end I have TM30R5 The 'R' is cocked and slightly out of line with the other numbers. the next set of markings are on the shaft two inches down from same end- stamped K1 and on the reverse side#14 with red paint. six inches down - stamped EP-6 w/yellow.From other end (with steel tip) two inches down I have C2 and on the reverse side D2 w/ purple paint. 6 inches down-CWC no paint. Hope this helps

packard38coupe

Hi all, I am a new member with a similar ID camshaft issue. My details are 73 cam the marking on back is 1137. From front to back I have C6 1H CWC on the other side D6, 23 and K1. does anyone know what make this cam is? I wanna know if it is a chevy or aftermarket? thanks

MelWff

CWC makes camshaft blanks and sells them to all the major cam manufacturers, if you google you will find most people never figure out who made the cam. The best you can do is measure the lobes and duration and decide what you want to do.,

packard38coupe

Thank you for the info, just what I needed.