GM Camshaft Identify - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**MMiller1050** · 10-24-2023, 02:06 AM

Hello,

I have a GM camshaft I am having a hard time figuring out what the specs are.
The numbers on the end of the cam are:

09406R and 071AC

There are no other numbers on the cam. Any help or link to a resource that I can look up this cam and get the specs would help me out alot. Love the forum and there is a lot of great people here.

MikeM

**MJN** · 10-24-2023, 09:50 AM

I know you said there are no other markings on the cam but this site states that the ID markings are usually in the center of the shaft between the lobes
https://www.nastyz28.com/sbchevy/sbccams.php

**70STOVEBOLT** · 10-24-2023, 03:28 PM

Is this a new GM branded camshaft or aftermarket? The 09406R looks to be laser etched rather than stamped like you would find on an original camshaft.

**MMiller1050** · 10-24-2023, 04:54 PM

Quote:

Originally Posted by MJN

I know you said there are no other markings on the cam but this site states that the ID markings are usually in the center of the shaft between the lobes
https://www.nastyz28.com/sbchevy/sbccams.php

I did find another number on the opposite end as the distributor gear that is between two lobes. Its either:

ACL 04 287 221 or
ACL 04 287 201

Not sure hard to read But it may help

There are no marking in the center.

**Warrens69GMC** · 10-24-2023, 10:07 PM

is this a flat tappet camshaft or a roller? What engine?

**Warrens69GMC** · 10-24-2023, 10:11 PM

Quote:

Originally Posted by 70STOVEBOLT

Is this a new GM branded camshaft or aftermarket? The 09406R looks to be laser etched rather than stamped like you would find on an original camshaft.

I have a 305 "peanut" cam from a 1989 firebird with TBI and it has laser etched part number and QR code on the end and stamped 603 between #1 I&E cam lobes

**MMiller1050** · 10-25-2023, 07:53 AM

This is a 90's 350 crate motor with roller lifters and from what I have been able to tell its a Vortec block.

Quote:

Originally Posted by Warrens69GMC

is this a flat tappet camshaft or a roller? What engine?

**Warrens69GMC** · 10-25-2023, 09:30 PM

Can you look where the fuel pump lobe would be and post a picture?

**MMiller1050** · 10-26-2023, 05:06 AM

Here is the picture where that number is on the fuel pump lobe. Its pretty hard to read.

indymachinist · 10-26-2023, 06:03 AM

What happened to the lobes?

**MMiller1050** · 10-26-2023, 07:48 AM

Quote:

Originally Posted by indymachinist

What happened to the lobes?

Not sure what you mean...but this cam came out of an engine I bought but I have replaced with a new GM cam. I just want to find out what this cam is since it was an unknown.

MikeM

MARKDTN · 10-26-2023, 07:58 AM

Quote:

Originally Posted by MMiller1050

Not sure what you mean...but this cam came out of an engine I bought but I have replaced with a new GM cam. I just want to find out what this cam is since it was an unknown.

MikeM

Was it stored underwater? I would not run that cam with all those pits-even being a roller. Too much risk. I would say that cam is scrap metal. If it was in a Vortec block it's probably a Vortec truck cam no?

**Rust_never_sleeps** · 10-26-2023, 12:49 PM

looks like someone carved those numbers with a die grinder and a bad case of the DT's ;-)

**Rust_never_sleeps** · 10-26-2023, 01:15 PM

my eyes are crap, but does anyone else see ACL04. then 387201 ?
Thought for a second that ACL was the brand, but they make bearings, not cams

**MMiller1050** · 10-26-2023, 06:57 PM

Quote:

Originally Posted by MARKDTN

Was it stored underwater? I would not run that cam with all those pits-even being a roller. Too much risk. I would say that cam is scrap metal. If it was in a Vortec block it's probably a Vortec truck cam no?

oh...those are not pits it is some left over oil and lube when it was taken out. It wipes off and the lobes are smooth....it just how the camera picks it up. Yes probably a vortec truck cam....just trying to figure out the grind.

**MMiller1050** · 10-26-2023, 06:59 PM

Quote:

Originally Posted by Rust_never_sleeps

looks like someone carved those numbers with a die grinder and a bad case of the DT's ;-)

Yeah....I don't get the laser etch look. I kinda though the acl meant AC Delco....but I don't know....just hoping someone does. I would like to figure out the grind.

MikeM

**Warrens69GMC** · 10-26-2023, 07:36 PM

I will upload a 350 vortec cam later tonight.

**Warrens69GMC** · 10-27-2023, 10:41 PM

Camshaft, notice the 345 where the fuel pump lobe would be

10-24-2023, 09:50 AM	#2
MJN Registered User Join Date: Feb 2000 Location: Maquoketa, Ia/ Orr, Mn Posts: 3,051	Re: GM Camshaft Identify I know you said there are no other markings on the cam but this site states that the ID markings are usually in the center of the shaft between the lobes https://www.nastyz28.com/sbchevy/sbccams.php __________________ '51 South Bend Model "9A" '56 Chevy 3600 NAPCO '74 Chevy Cheyenne Super K20-restored on 37's '72 GMC Sierra Custom K2500- in progress '08 GMC Envoy Denali '12 GMC Sierra 2500HD Denali '17 GMC Yukon XL VCCA member #58596 http://www.nohrco.com

10-24-2023, 03:28 PM	#3
70STOVEBOLT Senior Member Join Date: Jun 2005 Location: Winona Lake, IN Posts: 6,422	Re: GM Camshaft Identify Is this a new GM branded camshaft or aftermarket? The 09406R looks to be laser etched rather than stamped like you would find on an original camshaft. __________________ 70 C/10 SWB 402/TH400/3.73 "The Needy Beast" 200,000 Mile Club Disc Brake Club Owner installed options: Front Sway Bar Power Steering Power Brakes Cigar Lighter Courtesy Lights Deluxe Side Markers Wiper Delay Sliding Rear Window Power Windows Power Locks Sniper EFI 2015 Silverado 1500 LS 4.3/6L80/3.23 lowered 2" front & rear

10-24-2023, 10:07 PM	#5
Warrens69GMC Registered User Join Date: Jan 2003 Location: Safford,AZ Posts: 3,625	Re: GM Camshaft Identify is this a flat tappet camshaft or a roller? What engine? __________________ 1969 307, t350 1950 Chevy Wagon 1978 Big 10 1967 C10, 250,3-OTT

10-25-2023, 09:30 PM	#8
Warrens69GMC Registered User Join Date: Jan 2003 Location: Safford,AZ Posts: 3,625	Re: GM Camshaft Identify Can you look where the fuel pump lobe would be and post a picture? __________________ 1969 307, t350 1950 Chevy Wagon 1978 Big 10 1967 C10, 250,3-OTT

10-26-2023, 05:06 AM	#9
MMiller1050 Junior Member Join Date: Jun 2016 Location: Shelbyville, TN Posts: 56	Re: GM Camshaft Identify Here is the picture where that number is on the fuel pump lobe. Its pretty hard to read. Attached Images __________________ Michael Miller Tennessee 1969 Chevy C-10 Custom 2015 Chevy Colorado

10-24-2023, 02:06 AM	#1
MMiller1050 Junior Member Join Date: Jun 2016 Location: Shelbyville, TN Posts: 56	GM Camshaft Identify Hello, I have a GM camshaft I am having a hard time figuring out what the specs are. The numbers on the end of the cam are: 09406R and 071AC There are no other numbers on the cam. Any help or link to a resource that I can look up this cam and get the specs would help me out alot. Love the forum and there is a lot of great people here. MikeM Attached Images __________________ Michael Miller Tennessee 1969 Chevy C-10 Custom 2015 Chevy Colorado

10-26-2023, 06:03 AM	#10
indymachinist Registered User Join Date: Jun 2015 Location: Indanapolis, IN Posts: 603	Re: GM Camshaft Identify What happened to the lobes? __________________ -Curt My 1968 Chevy shortbed stepside build

10-26-2023, 12:49 PM	#13
Rust_never_sleeps Senior Member Join Date: Jun 2022 Location: San Ramon,CA Posts: 599	Re: GM Camshaft Identify looks like someone carved those numbers with a die grinder and a bad case of the DT's ;-)

10-26-2023, 01:15 PM	#14
Rust_never_sleeps Senior Member Join Date: Jun 2022 Location: San Ramon,CA Posts: 599	Re: GM Camshaft Identify my eyes are crap, but does anyone else see ACL04. then 387201 ? Thought for a second that ACL was the brand, but they make bearings, not cams

10-26-2023, 07:36 PM	#17
Warrens69GMC Registered User Join Date: Jan 2003 Location: Safford,AZ Posts: 3,625	Re: GM Camshaft Identify I will upload a 350 vortec cam later tonight. __________________ 1969 307, t350 1950 Chevy Wagon 1978 Big 10 1967 C10, 250,3-OTT

10-27-2023, 10:41 PM	#18
Warrens69GMC Registered User Join Date: Jan 2003 Location: Safford,AZ Posts: 3,625	Re: GM Camshaft Identify Camshaft, notice the 345 where the fuel pump lobe would be Attached Images __________________ 1969 307, t350 1950 Chevy Wagon 1978 Big 10 1967 C10, 250,3-OTT

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