I posted a similer post on C4 general, and got no replies. My 1996 LT4 has the engine code, but no vin stamped on the pad in front of the passenger side head. I thought "matching numbers" meant that the vin is stamped on the block on the stamp pad along with the engine code. Otherwise the engine appears correct including the casting date. It has 68K miles on it. Am I mistaken about the block stamping? Has GM stopped stamping vin #'s? Is this a factory replacement engine? Any other info apreciated.

 

Not sure if yours is in the same place as an LT1, but mine is a partial stamp on the right side of the block. If you do a search you will find where it is exactly, I have seen threads on this before.

 

I don't have an lt4 car, but I do have the motor The numbers are stamped on the machined flat spot on the front of the block, right below the coil, where the head meets the block.

anyway, mine reads vo810zxd on the lt4, and
on the old lt1 block..which i am pretty sure it original, is stamped vo227zxa which maybe relates to the vin somehow but i don't see it.. the vin is 1G1YY22P4T5113418, and as i said it was an lt1 a4 1996 car 3.07rear.

There is a sticker on the transmission shell that has in big letters 6ydd and maybe a 1 after it, but it might just be weathering.
on the same stick are the numbers 616yody16779324.

I'm pretty sure I am the first one to have the tranny down, since I had to break the jb weld or glue loose on the c beams.

If these numbers are related somehow, maybe someone can help you determine what the engine number should be.
maybe someone can help you, but the two I've seen have numbers on the engine. good luck.

 

This one is on my 1991 L98 ...



Btw, what does the V0412ZTA mean?

 

I think the top number is the motor's number.

 

It tells me you have an auto tranny, and don't have an engine oil cooler.

 

The larger number in the above LT4 motor is the motor #. The ZXD is the "sufix" designating LT4. The smaller #'s in the pic look like a vin, or part of a vin, and is not present on my LT4. I tought LT1 & LT4 were stamped the same way, but the " sufix" were different. One of the above motors has no vin stamped on the pad(LT4). the pics shows a vin on the LT1. I'm still confused by this. Should my LT4 have a vin # stamped on the pad we are looking at, or was only the LT1 stamped with vin?

 

both of my engines, the lt1 and the lt4 i listed above are from 96's, and there is no vin number on either, just the numbers i listed above.
hope this helps.
sam

 

The last 8 digits of the VIN on my 95 LT1 are located on the machined deck surface (same surface head bolts to on driver side) above the oil filter. I haven't looked on the LT4.

 

great infomation never would have thought to look there. They are there on my 96 lt1 and lt4.. Thanks mr dave. Now I know the last numbers of the vin my lt4 came from....If i could only find my reading glasses.

 

Now I'm confused. Does your 96 LT1, and LT4 have a vin stamped next to the larger motor like Eike's picture above, or just the motor designation number. (the larger of the two numbers in pic)?

 

i can't see the picture because my computer's video driver is not installed.... but on the front pad on both engines are the numbers vo810zxd (on the lt4), and the lt1 is stamped vo227zxa at the same location. They are large letters.

Then, on the drivers side rear pad, the last 8 digits of the vin are stamped in much smaller letters than on the front pad. Same with the lt4, but I can't make them out.

 

I have been trying to locate the engine VIN for my '93 LTI 6Speed. A search revealed this thread, and this response seems to be what I am looking for. Can someone be more specific on this location? Is this location for the '95 the same as '93? Is this better accessable from under the car or from the top? Is it easier to see with the oil filter off? Is there any stamp on the right (passenger) side head, front part?

 

Engine Code Stamping Numbers
All engines are stamped with an engine ID code, consisting of assembly plant code, production date and suffix code. V8 codes are stamped on a pad just forward of the right side (passenger) cylinder head.

The engine date must precede the car build date, otherwise something is amiss. Some engine machining operations (decking) will obliterate the engine ID.

Engine ID Code Example: V0101CLJ - (V = Plant, 01 = Month, 01 = Day, CLJ = Engine Suffix Code)
Another example: T0830CTY - (T = Tonawanda, 08 = August, 30 = 30th day, CTY = 1970 396 Camaro, 375 hp, 11.0:1, TH400)

Code Engine Plant Code Engine Plant
F Flint (Motor) S Saginaw Service
H Hydramatic T Tonawanda
K St. Catherines, Ontario V Flint (Engine)
(McKinnon Industries Canada)
M GM of Mexico

Casting Date
Small block casting date is located on driver side rear of block on flange forward of bellhousing. Big block on the right side of engine above the oil pan rails.

Casting Date Example: E038 - (E = Month, 03 = Day, 8 = Last digit of model year (1978)).

Month: A = Jan, B = Feb, C = Mar, D = Apr, E = May, F = Jun, G = July, H = Aug, I = Sep, J = Oct, K = Nov, L = Dec

VIN Code Format
The vin code format is stamped onto most engines. The format consists of divisional identification number, model year, assembly plant designation and vehicle serial or sequence number.
Starting in 1970, the serial number is stamped either above the oil filter, somewhere on the block pad (in front of the cylinder head), or on the transmission flange somewhere. Chevrolet issued technical service bulletins to indicate which engines were to recieve a vin stamp, so who knows what could have happend (or not happened).

VIN code format Example: 13N100001
(1 = Chevrolet, 3 = 1973, N = Norwood, 100001 = Production sequence of vehicle VIN)

/www.nastyz28.com/spmenu.html

 

Thanks for the reply. I will take a look this weekend and post the results!

 

Found the engine stamp at the rear, drivers side of the head, on the bellhousing flange. If someone can tell me how to post a photo, I will do so.

The stamp is "1PS116026". The first digit "1" is for Chevy, and I am guessing the second digit "P" is the model year, but I am not certain. Any help would be appreciated. 3rd digit "S" I assume is the Saginaw engine plant? Could this be a "5 (five)" instead of an "S"? The 4th digit "1" I guess is the production month, January? The car came off the Bowling Green line 4/19/93, so I guess this makes sense? The rest is the sequential last five of the whole car VIN#, car #16,026.

Under the engine, on both sides of the block, is "327", with a "2" under the 2 in "327" on the drivers side. Anyone know what these represent?

The transmission, a ZF 6 speed, has a plate on the passenger, with "type S6-40"; "Parts List No. 1052 000 046"; "Transmission-No.030703"; "Customer's Ref. No. 10235121"; "Total Ratio 2.64-0.49";
Much is self explanatory, but I wonder if any of these numbers ties into the engine and chasis?