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#1 |
Registered User
Join Date: Dec 2009
Location: Medicine Hat, Alberta, Canada
Posts: 68
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engine decoding
does this number make any sense? it is on the front pass. side of block? V032TBC
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#2 |
Registered User
Join Date: Dec 2009
Location: Medicine Hat, Alberta, Canada
Posts: 68
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Re: engine decoding
all i can find on this is it was built in flint march 23. anyone know what the "tbc"stands for?
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#3 |
Registered User
Join Date: May 2009
Location: Motor City
Posts: 9,200
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Re: engine decoding
"TBC" might be the engine broadcast code. They are usually a three letter combination, and are applied to the larger components (engine, trans, axles, radiators) that have a lot of part proliferation due to options. It's usually a paper tag applied to the front of the cylinder head or valve cover.
Rather than having the worker on the line try to comprehend all of the build variations and choose the right part, the engineers/assembly plant does the hard part for him. They might assign a TBC code to a certain engine; when the build manifest shows up for the particular truck it tells him to grab a TBC (as opposed to a TAC or TAB or some other engine) and bring it over to the line. I'm guessing, btw, in the absence of any other information.... K
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Chevrolet Flint Assembly 1979-1986 GM Full Size Truck Engineering 1986 - 2019 Intro from an Old Assembly Guy: http://67-72chevytrucks.com/vboard/s...d.php?t=342926 My Pontiac story: http://forums.maxperformanceinc.com/...d.php?t=560524 Chevelle intro: http://www.superchevy.com/features/s...hevy-chevelle/ Last edited by Keith Seymore; 01-04-2010 at 02:34 PM. |
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#4 |
Registered User
Join Date: Dec 2009
Location: Medicine Hat, Alberta, Canada
Posts: 68
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Re: engine decoding
thanks for that, i am going try and get the casting number from the back of the block today
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#5 |
member #16
![]() Join Date: Dec 1999
Location: Yuba City Ca.
Posts: 3,618
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Re: engine decoding
Scroll down to TBC suffix code.
http://www.nastyz28.com/gm-chevy-cod...s-suffix-6.php
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john http://67-72chevytrucks.com/vboard/showgroups.php board vendors ![]() http://www.flickr.com/photos/1745471...7602865984234/ |
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#6 |
Registered User
Join Date: May 2009
Location: Motor City
Posts: 9,200
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Re: engine decoding
Excellent chart, John, and it helps show what I was trying to convey.
You can see there are several engines listed for RPO LS9, a 350 cu in V8 (what they show as the "VIN" column). Within that RPO you have to have different part numbers for Federal emissions, California emissions, manual trans, auto trans, maybe even A/C vs non A/C, or even different product lines (ie, a C/K engine might have a different part number than a G van engine). Rather than have the operator scan through all the different part numbers, he is told to simply choose a TBC (rather than a TBD, TBE, etc). Axles are another good example, because even though they might have the same RPO for the ratio (ie, GT4), they might still vary by C vs K (number of lugs), brake RPO and posi vs non. Various part numbers and subsequent broadcast codes would be assigned so the guy selecting the rear axle can quickly chose the correct one and hang it on the line. Same thing for radiators (A/C vs non A/C, manual vs auto trans, HD vs LD vs standard duty, etc). Incidently (this is really super picky), it appears to me the column that they show as "RPO" is really incorrectly labeled, and should be labeled either "Broadcast code" or "suffix code". I recognize the LS9, LG4 and L69 codes as engine RPOs that we used to work with. Other codes you might see might be LB4, L18, LE8, L03, LO5, etc, for example. HTH - K
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Chevrolet Flint Assembly 1979-1986 GM Full Size Truck Engineering 1986 - 2019 Intro from an Old Assembly Guy: http://67-72chevytrucks.com/vboard/s...d.php?t=342926 My Pontiac story: http://forums.maxperformanceinc.com/...d.php?t=560524 Chevelle intro: http://www.superchevy.com/features/s...hevy-chevelle/ Last edited by Keith Seymore; 01-04-2010 at 06:08 PM. |
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#7 |
Registered User
Join Date: Dec 2009
Location: Medicine Hat, Alberta, Canada
Posts: 68
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Re: engine decoding
ok so where should i be looking for the other casting numbers. i looked by the oil filter and didnt see anything?
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#8 | |
The Older Generation
![]() ![]() ![]() Join Date: Aug 2006
Location: Montezuma, Iowa
Posts: 25,515
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Re: engine decoding
Quote:
On the back of the block where the bell housing or trans bolts up. (drivers side) LockDoc
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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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#9 |
Registered User
Join Date: Dec 2009
Location: Medicine Hat, Alberta, Canada
Posts: 68
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Re: engine decoding
anyone know the site to decode an engine? my number is 3970010. i think it was mortin or something like that?
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#10 |
Registered User
Join Date: Dec 2009
Location: Medicine Hat, Alberta, Canada
Posts: 68
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Re: engine decoding
looks like this casting number was used from 69-79. any way to tell if this is the original motor and numbers matching?
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#11 |
Senior Member
![]() Join Date: Sep 2000
Location: Agency IA.
Posts: 1,841
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Re: engine decoding
you can grt a lot of info here http://www.chevymania.com/
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72 Chevy short step side with 454 air and tilt. 72 nova project car 63 chevy II drag car Agency Iowa |
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#12 | |
member #16
![]() Join Date: Dec 1999
Location: Yuba City Ca.
Posts: 3,618
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Re: engine decoding
Quote:
http://www.mortec.com/
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john http://67-72chevytrucks.com/vboard/showgroups.php board vendors ![]() http://www.flickr.com/photos/1745471...7602865984234/ |
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