Engine Stamping Numbers. V8 Engine Block Casting Month Codes. A January. B February. C March. D April. E May. F June. G July. H August. I September. J October. K November. L December. Date codes consists of a letter, 1 or 2 digits for the day, and 1. J 2. 5 7 would be October. The block casting number on small block and big block Chevy V8 motors. This ledge is below the deck of the block and the. The engine assembly code looks similar to this T0. ED. In this case the first letter T stands. Tonawanda Engine Plant, either F. V would indicate Flint, MI., K. Mc. Kinnon Industries while S. Saginaw Service. The next two digits stand for the month. Cowl and ID Tags. Everything that you ever wanted to know about your car. Alternate title There is NO VIN on a 31 Chev This pages is to assist anyone who. Camaro VIN Interpretation 12ebbYPxxxxxx e. N506070 where 1 Chevrolet 2 Camaro e 3 for 6cylinder engine, or 4. In this example 0. June. The 0. 1 stands for the. Nice project car for sure. The 327 is a nice engine so I probably wouldnt do anything about it, unless, as Howard says, it was originally equipped with a 409. Sometimes but not always the letter I. So what do we have so far in this example The motor was assembled. Tonawanda factory on June 1st. The year is not specifically. What we have left is the suffix code which in this. ED, a 1. 96. 6 3. Chevy used one to three letters of the alphabet to code the type of. In that case. you might see T0. ED   6. A1. 74. 37. In this. example, 6. Decoding Chevrolet VIN, trim tags, cowl tags, engine, engine block casting numbers, cylinder head casting numbers, intake manifold casting numbers, transmission. CAST IRON HEADERS. The first step in improved performance. Nothing sounds like a six in heat The traditional favorite for sweet. For sale 427 Big block Chevy engine, just pulled, ran great, complete motor. Engine casting number is 3955270. Serial number on pad by water pump is T0928IT. Price 1,350. 00Availability In stockhttp hIDSERP,5266. Junkyard Engine Spotters Guide Car Craft Hot Rod NetworkBigBlock Chevy Bigblock Chevy engines are easily distinguished from smallblocks by their wide cylinder heads and splayed valves. However, telling a late 396 from. Casting Numbers The casting number is a sequence consisting of raised numbers that was cast into the engine block when it was made. Whats a bit tricky. A1. 74. 37. 3 decodes to 1. Atlanta final assembly, and the last. VIN.   Depending on the year and plant, the partial. VIN could be stamped into a different area of the block the flange. Beginning January 1, 1. As. far as research has shown, Chevrolet did comply. VIN on all engine blocks1. Again. The GM division number 1 for Chevrolet. VIN.   A 1. 96. 8 version of an Atlanta partial. VIN stamping would 1. A1. 74. 37. 3. vs. Chevrolet Serial Number On Engine Blocks' title='Chevrolet Serial Number On Engine Blocks' />Beginning in late 1. This example happens to be a September 2. TH4. 00 transmission as noted by the CTW suffix. The plant, date, and engine ID codes were stamped at the respective. VINs when applicable were. Therefore the two stampings will. There is another type of stamping found on some blocks. This is the CE. You might see something like this CE0. The CE. stands for Chevrolet Engine. Counter Engine, Counter. Chevrolet-Camaro-Registry/images/pics/TO614MQ.jpg' alt='Chevrolet Serial Number On Engine Blocks' title='Chevrolet Serial Number On Engine Blocks' />Exchange and Crate Engine was used on blocks that. If a customer had problems with his. CE with a 6 digit number following. Its important to note that. CE designation for replacement Chevrolet engines did. The CE block stamp year is the year the block. Here you can clearly see the CE0. This. one produced in 1. Tonawanda with engine serial number 6. Note the A in the CE0. A6. 12. 17 stamping on the engine pad. Tonawanda. warranty engines were sequenced from 5. A was added to note the rollover. Here you can clearly see the CE1. Download Winning Eleven 7 Full Version For Pc. This. one produced in 1. Tonawanda with engine serial number 7. Here you can clearly see the CE1. This. one produced in 1. Tonawanda with engine serial number 7. CE stamping 0. 66. CE stamping 0. 73. T1. 09. Courtesy Todd Burke. A calendar year 1. A calendar year 1. Warranty engines will be date stamped on the starter mount pad. Here T0. 99 represents Tonawanda T, September 0. Warranty engines will be date stamped on the starter mount pad. Here T0. 99 represents Tonawanda T, June 0. Its been reported that beginning in 1. A after. the CE and year designation. For example, Tonawanda was. CE. prefix would become CEx. A where x is the year such as CE0. A5. 00. 00. It is believed this method of identifying replacement engines stopped. This is supported by a notation in. Chevrolet parts book, The engine plants. V8 Engine Block Casting Numbers. By Year 1. 96. 4 1. Partial VIN stamping on engine blocks. Often referred to as a gang stamp because the partial VIN characters. Flint engine plant stamp was used to gang the. Before a federal mandate that all engine blocks be stamped with a. VIN, generally, only the 3. Chevelles along with the L7. Chevelles. were stamped with a partial VIN. These were done by hand and by. The partial VIN consisted of a single number representing the. Beginning January 1, 1. VIN consisting of a single number for. General Motors division Chevrolets number is 1, followed. General Motors standardized this procedure by using whats called. Each individual. stamped character was placed in a holder and secured before the engine. This. holder allowed for consistency in the particular characters used and. VIN stamp was uniformly done from car to car. Even. though some plants elected to stamp partial VINs on other locations. VIN on the engine pad next to the Flint or Tonawanda engine. ID letters. 1. 97. Van Nuys example of the partial VIN stamped on the rough cast area. Atlanta example of the partial VIN stamped on the engine pad. Not to say mistakes werent made as the person responsible had to. The plants. employed a blank stamp to obliterate a mistaken stamp so the corrected. There is a question as to whether. VIN. The information has been found on numerous Ford. Starting in 1. 96. Ford began. stamping partial VIN information on production engine blocks to meet. Title 4. 9, United States Code, Subtitle VI, Part. C, Chapter 3. 31 effective January 1, 1. Reading section. 3. Voluntary vehicle identification number sounds more. See. http uscode. C3. 31. txt or search the Internet. Title 4. 9, United States Code, Subtitle VI, Part C, Chapter. Mo. Par forums searched seem to indicate that Mo. Par didnt follow the. Transmission. Transmissions were also subject to replacement, be it just the case. These will have a stamp something like CC. Chevrolet Case or CT for Chevrolet Transmission. The. same information about partial VINs on engine blocks also applies to. Chevy 3. 48 4. 09 Engine Block Guide. The good news about 3. Chevrolet W engine factory blocks built from 1. The bad news is that most were built more than 5. On top of that, rebuildable 4. Original 4. 09s are highly coveted and a decent block often sells for about 5,0. If youre restoring an Impala or another Chevy car or truck with a rebuildable block, you already have the foundation for your engine build. But if youre looking for an engine to build, old iron blocks are not the only option. Companies, such as World Products and Bob Walla Racing, offer new aluminum blocks based on the original W. Certainly, if youre considering a high performance build of 5. Therefore, these blocks are a far more reliable and cost effective alternative for a high performance build. This Tech Tip is From the Full Book  HOW TO REBUILD MODIFY CHEVY 3. ENGINES. For a comprehensive guide on this entire subject you can visit this link SHARE THIS ARTICLE Please feel free to share this post on Facebook Twitter Google or any automotive Forums or blogs you read. You can use the social sharing buttons to the left, or copy and paste the website link  https www. The World Products Merlin 4. W block follows the same basic architecture of the stock W engine but incorporates Chevy big block features. With this platform, you can build a high performance street as well as a full race engine. It accepts big block Chevy camshafts, connecting rods, timing chain and cover, and a crankshaft stroke thats up to 4. If you opt for an original block, most dedicated W enthusiasts can find a useable one for building a 3. The trick is to know what youre looking at when you do find one. And if you cannot find a sound OEM 3. The first question W hunters typically ask is, Just how many did they make As with block casting numbers or any casting numbers for that matter, the information on just how many blocks were made by  Chevrolet is incomplete. We do know, however, that production of the 3. Chevrolet continued making the 3. In fact, because the 4. The 3. 48 ran from 1. Block Identification. One of the quickest ways to spot a 3. W engines have the two water pump inlets to the block spread out across the front. The holes are located very close to the outside of the block and their inlets with one side flattened are closer in shape to a diamond than a circle or oval. They are located just above a freeze plug and use two bolts to mount the water pump on each hole. If the block being inspected still has the water pump attached, its easy to see that the centers of the two bolts holding the water pump to the block are on an angle, as opposed to being vertical. The other way to identify the difference, although it is a little more difficult, is to look at the shape of the cylinder bores. Where the bores meet the deck, they look slightly oval rather than the usual round. Its not something normally seen on first glance but once the shape is deter mined, it is a quick confirmation for a W engine. One view of the World aluminum W block shows the steel main caps and distinctive water pump bosses outboard on the face of the block. There are four bolt mains for all crankshaft journals and stout webbing underneath the full width main caps. Chevrolet placed an X on the front of the block for the passenger 4. X in this location, its a 1. The external physical differences between a 3. Although some folks use the location of the dipstick to determine the engine size, the oil pans determine where the dipstick is located, not the blocks. Therefore, since the 3. If the block has had one or both of the heads removed, checking the bore can provide solid clues. But as some blocks may have had work done to them in the past, bore size IDs are not always proof, either. Casting numbers are still the fastest and most accurate way to identify a block. Design Features. The cast iron W blocks distinctly differ from small and big block Chevys in a few areas. The first and most obvious is the water pump inlet hole locations in the block, which are spaced farther apart than on small or big blocks, and the openings are diamond shaped rather than round. The cylinder reliefs are the next identifying feature, which are cut into the piston bores as detailed earlier. Both the 3. 48 and 4. As a general rule, those two cuts equal the 7. W engine for trucks. One relief cut indicates a block with 9. Both truck blocks are excellent starting points for building a strong W engine. The last identifying feature is the angle of the deck. While small and big block Chevy engines have 9. Ws have a 7. 4 degree deck. Only two sizes of W engines were offered, and therefore its much easier to identify a W block than a typical small or big block Chevy engine. Thats because those two engines had a longer life and offer literally dozens of variations. For W fans, its either 3. Yes, there is the elusive and extremely rare Z1. Holy Grail of W engines. But interestingly, the Z1. For the Z1. 1, its all about the heads and intake and in a minor way, the crank and rods. Casting Numbers. My research found ten block casting numbers that apply to the 3. The Z1. 1, as previously noted, shares the same casting number as one of those 4. These casting numbers are found on the rear of the block, on the flange that goes from the block to the bellhousing, and on the drivers side of the block as it sits in the car or truck. They are easy to read as they are raised letters and numbers cast with the block. This is in opposition to a serial number or VIN that is stamped into block on the front of the passenger side deck where it meets the head. The other difference is casting numbers are the same for their respective parts while VIN and serial numbers are records and no two are alike. The casting number is found at the driver side rear of the block. Cast ing numbers reveal vital information about the engine, including model, horsepower, and whether its a car or truck engine. Date Codes. In the era the Ws were built, vehicle identification numbers VIN were not always used. A VIN can be used for determining the age of a block and is stamped into a pad on the front of a block. Date codes were cast into the blocks. The date code of a W can be found on the back end of the block, on the skirt where the bellhousing mounts to the block. Another number that is found in the same area is the blocks casting number, and that can be used to determine the application. Typically, the date code starts with a letter that signifies the month cast A equals January, B equals February, and so on. The middle number or numbers indicate the day of the month it was cast 1 through 3. The last one or two numbers indicate the year 0 for 1. As these engines were made only from 1. Engine Design Features. The 3. 48 and 4. 09 heads have six bolts per cylinder and fit either block, but even though both heads fit, they are not readily compatible. Therefore, you should not bolt together mismatched heads and blocks because it could lead to out right engine failure. The 4. 09 heads valves may impact the smaller bore on a 3. The bores differ enough between the two W engines, so the heads and the block should be of the same displacement. When swapping in the other direction, such as putting 3. The other factor in swapping heads is the use of the correct intake manifold. W engine heads need to match the intake and vice versa or additional problems occur.