Engine Code Identification Help - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Ravenmocker · 09-09-2007, 11:22 AM

The engine markings I can locate in my 1972 K10 Stepside are marked as such: K 02 05 TMM....I have another number located as: T4B513513.

If these were copied correctly from the motor, what type, size and year is this motor? I am unable to locate the exact answer. The T could be Towanda plant? the K maybe another location? The suffix of TMM shows maybe a 1974 or a 1980? I hope someone can point me to the correct size and year of this motor. I currently have a Holley carb with the number 85111-1 and 09111 on the engine and cannot identifiy the carb either. Any help is appreciate for a "newbie" chevy owner.
Thanks

**john** · 09-09-2007, 02:52 PM

Heres TMM suffix code.

RPO FY CID appl VIN HP BBLS Body/Comments

TMK 1980 350 van, bus, m/t, Cal M LT9 170 4 C-30 & 3500
TML 1974 350 van & bus 145 2 C-10 & 1500
TML 1980 350 van, bus, m/t, Cal M LT9 170 4 C-30 & 3500
TMM 1974 350 conv.cab 145 2 C-10 & 1500
TMM 1980 350 conv. cab, a/t, Cal M LT9 170 4 C-20 to 3500
TMR 1980 350 van, bus, a/t, Cal M LT9 170 4 C-30 & 3500
TMS 1980 350 fwrd cab, a/t, Cal M LT9 170 4 C-30 & 3500
TMT 1974 350 conv.cab 160 2 C-50 & 5000

After reading farther I see you have this info already.

JimKshortstep4x4 · 09-10-2007, 10:04 AM

This is what I came up with on the vin no. K0205TMM.

K= St. Catherines, Ontario mfg. plant where engine was built
02= February, month of manufacture
05=Day of month, (Feb. 5th) built
TMM= (John has information listed, so I won't repeat).

If your engine has the original manifold on it, then you can probably determine if it is a 74 or 80 as the 74 had a 2 bbl on it and the 80 had a 4bbl on it. The casting date on the back of the engine will tell you, also. I can't help you on the Holley numbers.

Jim

**LockDoc** · 09-10-2007, 10:20 AM

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Like Jim said, the casting numbers on the bell housing flange(usually on drivers side) might narrow it down for you. Go here to look it up:

http://www.mortec.com/castnum.htm

LockDoc

09-09-2007, 11:22 AM	#1
Ravenmocker U.S.N. EOD Join Date: Feb 2007 Location: New Hampshire Posts: 46	Engine Code Identification Help The engine markings I can locate in my 1972 K10 Stepside are marked as such: K 02 05 TMM....I have another number located as: T4B513513. If these were copied correctly from the motor, what type, size and year is this motor? I am unable to locate the exact answer. The T could be Towanda plant? the K maybe another location? The suffix of TMM shows maybe a 1974 or a 1980? I hope someone can point me to the correct size and year of this motor. I currently have a Holley carb with the number 85111-1 and 09111 on the engine and cannot identifiy the carb either. Any help is appreciate for a "newbie" chevy owner. Thanks

09-09-2007, 02:52 PM	#2
john member #16 Join Date: Dec 1999 Location: Yuba City Ca. Posts: 3,618	Re: Engine Code Identification Help Heres TMM suffix code. RPO FY CID appl VIN HP BBLS Body/Comments TMK 1980 350 van, bus, m/t, Cal M LT9 170 4 C-30 & 3500 TML 1974 350 van & bus 145 2 C-10 & 1500 TML 1980 350 van, bus, m/t, Cal M LT9 170 4 C-30 & 3500 TMM 1974 350 conv.cab 145 2 C-10 & 1500 TMM 1980 350 conv. cab, a/t, Cal M LT9 170 4 C-20 to 3500 TMR 1980 350 van, bus, a/t, Cal M LT9 170 4 C-30 & 3500 TMS 1980 350 fwrd cab, a/t, Cal M LT9 170 4 C-30 & 3500 TMT 1974 350 conv.cab 160 2 C-50 & 5000 After reading farther I see you have this info already. __________________ john http://67-72chevytrucks.com/vboard/showgroups.php board vendors http://www.flickr.com/photos/1745471...7602865984234/ Last edited by john; 09-09-2007 at 02:54 PM.

09-10-2007, 10:04 AM	#3
JimKshortstep4x4 Senior Member Join Date: Jul 2001 Location: Muskegon,MI,USA Posts: 6,026	Re: Engine Code Identification Help This is what I came up with on the vin no. K0205TMM. K= St. Catherines, Ontario mfg. plant where engine was built 02= February, month of manufacture 05=Day of month, (Feb. 5th) built TMM= (John has information listed, so I won't repeat). If your engine has the original manifold on it, then you can probably determine if it is a 74 or 80 as the 74 had a 2 bbl on it and the 80 had a 4bbl on it. The casting date on the back of the engine will tell you, also. I can't help you on the Holley numbers. Jim __________________ 1971 Shortbox step side 4x4, 350 sbc, 3:07 rear end 1965 Impala SS 400 sbc, Muncie rock crusher 1966 Impala SS 396 bbc, TH 400 1969 El Camino, 350 sbc, TH 350 1971 Snowplow built on a Blazer frame 1972 GMC Short bed, stepside, TH 400, 427 BBC Last edited by JimKshortstep4x4; 09-10-2007 at 10:05 AM. Reason: Added wording

09-10-2007, 10:20 AM	#4
LockDoc The Older Generation Join Date: Aug 2006 Location: Montezuma, Iowa Posts: 25,423	Re: Engine Code Identification Help - Like Jim said, the casting numbers on the bell housing flange(usually on drivers side) might narrow it down for you. Go here to look it up: http://www.mortec.com/castnum.htm LockDoc __________________ Leon Locksmith, Specializing In Antique Trucks, Automobiles, & Motorcycles (My Dually Pickup Project Thread) http://67-72chevytrucks.com/vboard/s...d.php?t=829820 -



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