Engine block pad decode help - Chevelle Tech
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post #1 of 13 (permalink) Old Oct 14th, 19, 4:51 PM Thread Starter
 
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Engine block pad decode help

I have searched everywhere for this. I found all the other codes but not the engine im looking at.


Long story short I am in the process of purchasing a Chevelle and one I am looking at has the code T0211GBG. I cant find the GBG anywhere. Its a Chevelle SS tribute vehicle.


The number is correct as I have a picture of it.


Any help would be appreciated!
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post #2 of 13 (permalink) Old Oct 14th, 19, 5:04 PM
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Re: Engine block pad decode help

What is the casting number of the block ? Are you sure it isnt CBG ?? That is a 71-72 454 code.
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post #3 of 13 (permalink) Old Oct 15th, 19, 10:40 AM Thread Starter
 
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Re: Engine block pad decode help

I will look for that and its definitely the numbers and letters I posted above. I talked to a chevy parts dept, and they said it could possibly be a fleet truck block. They were stamped differently. Don't know how true that is.
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post #4 of 13 (permalink) Old Oct 15th, 19, 1:21 PM
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Re: Engine block pad decode help

What engine do you think it is and what year car ?

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post #5 of 13 (permalink) Old Oct 15th, 19, 1:31 PM Thread Starter
 
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Well it’s 1970 Malibu which was made to
a Chevelle ss ls5 clone. It’s for sure a 454. Just trying to figure which block?
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post #6 of 13 (permalink) Old Oct 15th, 19, 1:48 PM
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Re: Engine block pad decode help

I bet it is CBG or supposed to be. Dont discount the fact that mistakes were made at the factory. Humans more than likely set up the stamps and a G looks almost like a C See what the casting number is and the date code.

Bill Koustenis
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post #7 of 13 (permalink) Old Oct 15th, 19, 1:57 PM
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Re: Engine block pad decode help

I downloaded the pic to blow it up. That's GBG for sure but possibly meant to be CBG? I couldn't find anything on it.

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post #8 of 13 (permalink) Old Oct 15th, 19, 2:54 PM
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Re: Engine block pad decode help

That's a newer block produced much later than 1970. Get the casting date and casting numbers off the block. Check the pad behind the alternator for additional stampings. Get the casting numbers and dates for the heads and we'll be able to tell what heads you have, To get the head info, you'll have to remove a valve cover.
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post #9 of 13 (permalink) Old Oct 15th, 19, 5:09 PM
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Re: Engine block pad decode help

By the way, where exactly is the number stamped on the block ? Trying to figure out your picture and drawing a blank.

.
.
Never mind I figured it out. I have a later model Mercruiser block here that is stamped in that spot.

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post #10 of 13 (permalink) Old Oct 15th, 19, 6:10 PM Thread Starter
 
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I’ll try and get the other numbers when I go see the vehicle again.

The numbers stamped are T0211GBG.

So I assume it’s a boat engine?
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post #11 of 13 (permalink) Old Oct 15th, 19, 6:10 PM
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Re: Engine block pad decode help

Here's a photo of later blocks. They have a machined circular surface just above the timing chain cover(upper arrow). Many will have the con VIN stamped on the pad behind the alternator or as depicted by the lower arrow. The numbers on the pad are often lost when the block is decked. The font on the circular pad is much smaller on the engines I have here as compared to the ones shown by the op.

T0211GBG = Tonawanda block. The 0 is most likely 1980 or 1990 because 70 blocks did not have the circular pad above the timing cover. Casting numbers and casting date will help narrow it down. Like the others, I can't find GBD listed in any sources. I con vin might narrow the original application-if found.
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post #12 of 13 (permalink) Old Oct 15th, 19, 6:24 PM
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Re: Engine block pad decode help

Quote:
Originally Posted by z28wiz View Post
I’ll try and get the other numbers when I go see the vehicle again.

The numbers stamped are T0211GBG.

So I assume it’s a boat engine?
My eyes might be playing tricks on me, but check to see if there are other smaller stamped in numbers above the large stampings we can see fairly well in your photo. Many boatbuilders used over the counter crate engines marked XXA which was a near equivalent to an LS6 engine.
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post #13 of 13 (permalink) Old Oct 15th, 19, 8:20 PM
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Re: Engine block pad decode help

Quote:
Originally Posted by z28wiz View Post
So I assume it’s a boat engine?

Not at all. The block I have happens to be but those blocks were used more in trucks and cars than boats. A marine engine would have a totally different code.

Bill Koustenis
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