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Old 01-16-2013, 01:23 PM
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engine codes

Hi im hopeing that someone can tell me how i can find out were my 1968 GTO engine came from just from the numbers on it? vin. on the block= 21A158768.its a 400cid. Thanks!
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Old 01-16-2013, 02:01 PM
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Quote:
Originally Posted by mariov View Post
Hi im hopeing that someone can tell me how i can find out were my 1968 GTO engine came from just from the numbers on it? vin. on the block= 21A158768.its a 400cid. Thanks!
Well, it DIDN'T come from your 68 GTO. The first character (2) means Pontiac division. The second character (1) is the model year - 1971. The third character (A) is the assembly plant - Lakewood, GA. The remaining six digits are the last six from the VIN of the car that motor was originally installed in. I don't know what models of Pontiacs were built at Lakewood in the 1971 model year.
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Old 01-16-2013, 02:09 PM
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I have a 1967 GTO 400. The engine identification number is located on the block, on the flat surface in the back of the engine where the distributor is. You may have to pull the distributor to read it. It is stamped....not casted.

There are various websites that will give you the breakdown that you are looking for. Just search Pontiac engine code identification or something similar. I'm guessing your car was built in Pontiac, Michigan.

I wouldn't go by the vin number. My car is actually a 1966 LeMans that was badged as a 326. Back then almost all Pontiac blocks (V8) were the same size in appearance The car had sat for 33 years when I found it. Apparently at one time back in the late sixties or early seventies a 1967 GTO 400 was put in. The only way I found this out was by using the numbers on the block by the distributor. Lucky break for me. I had a local engine shop rebuild it with a comp cam, flat top pistons and the rest is Edelbrock. Took me three years to build the car. Just finished it a couple of weeks ago.

Hope this helps.

Chris

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Old 01-16-2013, 02:24 PM
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I wouldn't go by the vin number.


Uh, the O.P. is asking about the VIN derivative stamp on the block. You kinda HAVE to go by that to tell anything specific about the motor (well, at least about the block since the heads and everything else could have been changed). He already knows the block is a 400 from the casting number.
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Old 01-17-2013, 06:42 AM
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Where do you guys get this "stuff"???

The engine "code" is a two-digit stamping on the front, near the partial VIN. A '68 GTO 350HP 400, manual trans, would have a "WT" code. A 360 HP version would be WS. The "Ram Air" stuff for '68 is very rare. The auto trans versions usually use a "Y" instead of "W". There ARE variations, but these are the "common" ones.

At the back by the distributor, is the DATE CODE. A 4-digit "tag" (looks like a tag, "cast in"). The first digit is the month (A - Jan, B = Feb, etc.). The second and third digits are the day of the month. The last digit is the last number of the year of production. By using the production code, date code and casting number (7 or 8 digit num ber, cast into the bellhousing flange), one can deduce exactly what the engine is from. Pontiacs with a date code after Jul 7 are generally "next year's model".

A website with very complete Pontiac production data is:

wallaceracing.com

Jim
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Old 01-17-2013, 09:45 AM
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Originally Posted by Mr. P-Body View Post
Where do you guys get this "stuff"???
Well, we start by reading the O.P.'s original question:

Quote:
Originally Posted by mariov View Post
vin. on the block= 21A158768. its a 400cid.
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Old 01-17-2013, 09:54 AM
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Can you tell me what these engines are and from. One has this number F03I7HC and the other is V0320TPA. Thanks in advance.
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Old 01-17-2013, 10:49 AM
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Originally Posted by eddybugn View Post
Can you tell me what these engines are and from. One has this number F03I7HC and the other is V0320TPA. Thanks in advance.
Scroll down here to suffix code menu.....
How to decode Chevy Engine Codes
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Old 01-17-2013, 11:26 AM
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Since the OP asked about a Pontiac engine, I'll try to get back on topic. The three codes that are needed to tell what the engine came from are the casting number, the casting date code, and the engine ID.

Bill
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Old 01-17-2013, 12:00 PM
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There is no TPA suffex code listed.How do I find out what it is?
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Old 01-17-2013, 02:50 PM
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Originally Posted by eddybugn View Post
There is no TPA suffex code listed.How do I find out what it is?
I've got some books on Pontiacs as do a quite a few of the Pontiac guys.
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Old 01-18-2013, 11:12 AM
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Bill knows Pontiacs. So do I. We've both told the OP the same thing. The partial VIN on the block is meaningless regarding ID of the ENGINE.

To correctly identify a Pontiac you need: Engine code (2 digits, alpha-numeric, stamped on the front of the block NEAR the partial VIN); date code (by the distributor) and block casting number (on bellhousing flange), both CAST "in". That's IT.

Relax. It isnt that complicated... (:-

Jim
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Old 01-18-2013, 02:30 PM
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Quote:
Originally Posted by mariov View Post
Hi im hopeing that someone can tell me how i can find out were my 1968 GTO engine came from just from the numbers on it? vin. on the block= 21A158768.its a 400cid. Thanks!
First, welcome to Hotrodders. Thinks aren't always like you see it here today.

Pontiac engine ID/info? No problem. Take a minute to see what's here. The rest of the page is there if you want to take a look.

Pontiac info and sites will give you some places for parts/info besides here- but there are guys here that can answer most anything Pontiac-related.
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Old 01-18-2013, 02:47 PM
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Guys, unless I miss my guess, Eddy's asking about two Chevy small blocks. (HC and TPA are Chevy suffix codes.)

Quote:
Originally Posted by eddybugn View Post
Can you tell me what these engines are and from. One has this number F03I7HC and the other is V0320TPA. Thanks in advance.
The best site for suffix codes (chevymania) is down again. But I recall TPA is a 350 sbc truck engine suffix (could be a 4-bolt main)- although there can be other engines that use the same suffix code- like all the different engines that use HC. That's why you need the date code and block casting numbers to tie it all together to one application. More info on ID'ing your engine is here.

If you have more questions, just start a fresh thread. And welcome to Hotrodders.
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