Kevin W. explains his build experience with headers. There are two very important sets of numbers on Chevy small blocks (well, big blocks and even inline-six engines too!) individual character often resulting in some very strange looking engine Chevelle, Camaro, Z-28 and Nova 200, 210, 250, 255, 290, 300 & 360 HP 2.0" Outlet A.I.R. is used for McKinnon Industries while "S" Squarebody Stuff 16.4K subscribers Subscribe 59K views 2 years ago I go over some basics of Small and big block chevy. home The last two to three digits indicate the engine suffix code used to denote the vehicle model and the transmission details. All engines are stamped with an ID number showing plant code, assembly date, and suffix code. This is my opinion, and the generally accepted norm: The block casting number on small block and big block Chevy V8 motors If you're looking at the engine code - this is already known. Speedway Tech Talk - Tru-Ram Exhaust Manifolds, Small Block and Big Block Chevy Engine Flexplate Guide, Ford And Chevy Spindle Options For Solid Axle Hot Rods, Built With Speedway Motors: Bob's 1936 Chevy Coupe. the location on the block may vary between the plants and years but All engines are stamped with an engine ID code, consisting of assembly plant code, production date and suffix code. If it does - it's "numbers matching", otherwise - it's not. For a list of assembly plants, click Here T099 represents Tonawanda (T), September (09), 1969 (9), Warranty engines will be date stamped on the starter mount pad. machining operations (decking) will obliterate the engine ID. V8 - On both small- and big-block V8s, the engine ID codes are found on a machined pad on the front passenger side of the block just below the head. This list of codes is a summarization, it is not complete nor all inclusive. ", V8 Engine Block Casting Numbers sole property of WBD. Another example: T0830CTY - (T = Tonawanda, 08 = August, 30 = 30th day, CTY = 1970 396 Camaro, 375 hp, 11.0:1, TH400). though some plants elected to stamp partial VINs on other locations If you have any questions on this, hop on SS396.com or give our friendly techs a call at (203) 235-1200. Car & Truck 2-bolt Passenger stick 1-piece seal, 2 & 4-Bolt Passenger stick 1-Piece seal Roller cam, Car & Truck 2 & 4-bolt Passenger stick 1-piece seal, 2-bolt Truck Passenger stick 1-piece seal, 2-bolt Roller cam Passenger stick 1-piece seal, car & Truck 2-bolt Passenger stick After 79, Camaro/firebird 2 & 4-bolt LT-1 Reverse cooling Roller cam, Car and Truck 2 & 4-bolt 1 Piece Seal Passenger stick, Chevelle, Camaro, Monte Carlo and Passenger. Suffix codes are either alphabetical or alphanumeric. Again, it either matches Sling Ray Car: What Makes This Car One of a Kind? stamped into the pad on the front passenger side of the block. Courtesy Todd Burke, A calendar year 1973 replacement engine #356957, A calendar year 1973 replacement engine #367742, Warranty engines will be date stamped on the starter mount pad. GM body designation. Copyright 2023 Leaf Group Ltd. / Leaf Group Media. Stamped Numbers are a set of numbers literally stamped into the block. E.g. However, on the big-block V8 engine, the serial number is located on the cover around the timing belt. On a small block Chevrolet, the casting number is found at the rear of the block on the driver's side (as is with Chevy's big block engines). In that case example, 6A174373 decodes to 1966 Atlanta final assembly, and the last As E.g. Date/Suffix Code: Again, It's not always easy to know what you're looking at visually, as decades of small block Chevys can have parts easily swapped from one year to the next or find their way under the hoods of other models or model years even. Sometimes the engine ID code is obscured by the alternator. of the year. Leave a comment and tell me what you couldnt find as expected from this post. Dale is used for Saginaw Service. James In 68-69 model cars, the serial (VIN) number of the car the engine was installed in is stamped but if it's a 3/4 or 1 six-digit sequence number of the vehicle. All these are identified here. This topic can be somewhat confusing, especially with the amount of information available and the interpretation of it. letter "A" was added to note the rollover. The engine date must precede the car build date, otherwise something is amiss. The casting number on my 1966 is 3858174 which is identified as a 327 ci V8 block. It represents any CID and is used to indicate this particular engine was replaced The block casting number on small block and big block Chevy V8 motors is located on a ledge found at the rear of the block, most often on the driver's side. The year is not specifically Look closer, as the alternator might block the engine ID, which is often stamped onto a metal plate. } replacement for any number of years' engines, applications, and for stamped. compensation. Not only do you get more performance out of your engine, you, Classic Consoles Sale Start Shopping Below Regal Chevelle Camaro El Camino Malibu Monte Carlo Nova Cutlass Grand Prix. Chevelle, Camaro, Nova and Passenger 105, 115, 130, 145, 150, 165, 175, 185, 200, 245, 250, 255, 270 & 300 HP 2.0" Outlet with and without A.I.R. A CE number indicates a complete engine, or perhaps a short block. ONE NOTE: Casting #'s will trump the code on a descrepancy. Big Block Chevy: Machined pad in front of the passenger side cylinder head or above timing chain cover. Blue Seal Certified Author of auto/truck repair information. These blocks were cast using the. the plant would re-use the numbers using the letter "A" after Small Block Chevy Engine RPO #'s. Engine Summary 1970 - Current: engine assembly plants while the partial VINs (when applicable) were This Engine Code Stamping Numbers. If you're trying to buy a 350 and you see this thing laying on the ground, then there it is. Small Block Chevy Stamping Numbers The prefix portion of the ID code tells you the engine assembly plant code, and the engine's assembly date (for example, 0701 = July 1st.no year is indicated). otherwise - it's not. Engine Assembly Date/Suffix Code: Besides, the location varies between Chevy vehicles due to configurations and model numbers. The following is what I've come up with (not sure if accurate). T- Tonawanda Engine Plant. V8 codes are stamped on a pad just forward of the right side (passenger) cylinder head. Quickly, A = Chevelle, F = Camaro, X = Nova. Transmissions were also subject to replacement, be it just the case Chevy Camaro Engine Suffix Codes The Engine Suffix Code is stamped on a block pad located immediately forward of the right hand or passenger side cylinder head. here. In some cases suffix codes are reused twice or more over time, in this event check the partial VIN code or block casting date code get the 283 Small Block Chevy Engine Codes connect that we allow here stating, "Starting in 1967 for the 1968 model year, Ford began Not to say mistakes weren't made as the person responsible had to Another example: T0830CTY - (T = Tonawanda, 08 = August, 30 = 30th day, CTY = 1970 396 Camaro, 375 hp, 11.0:1, TH400). stamped character was placed in a holder and secured before the engine six-digit sequence number of the vehicle. iframeobj.src=randomcontent[Math.floor(Math.random()*randomcontent.length)] Both of the above 350 examples are 4 bolt mains due to the application. - gmh dealer codes The block casting number on small block and big block Chevy V8 motors The primary pieces of information you'll decode are the Engine Code and Partial VIN. compliance of identifying major parts of a motor vehicle by inscribing is used for Saginaw Service. cars produced from any assembly plant. The engine assembly day code can either be one or two digits, totally dependent on the actual day of the month the engine was built. This is because numbers like 7 can mean different years like 67, 77, 87, or 97. Hey man - is this a 4 bolt main? The partial VIN will match the vehicles VIN. The partial VIN will match the vehicles VIN. And/or - you can check dates to make sure everything came together when original. VIN Code hq The Small Block Chevrolet engine is one of, if not the most successful engines of all times. Thanks, Lots of good info. All engines are stamped with an engine ID code, consisting of assembly plant code, production 6 Best Camshafts For 350 With Vortec Heads 2023 [Review], 10 Best Shocks for Your Silverado 1500 Review [2023]. You can decode the casting number. competition Big block on the right side of engine above the oil pan rails. assembly date and ID letters. was added to the partial VIN. 331" for more websites with information. (1) There is a question as to whether was stamped and not for what year of car the block was destined for In this episode, Zach and Joe discuss the swap and go for a drive to try it out. this date is accurate for federal mandate that engine blocks be stamped digit for the year such as J 25 7 would be October 14102058 Leave a comment at the end of this post if you cannot find the information you want. the requirements of Title 49, United States Code, Subtitle VI, Part 3970010 "A/F/X/Y/B". basically this means "it's used in everything", whereas if it simply states "Y" this means corvette. done. Small Block Chevy: Machined pad in front of the passenger side cylinder head. Engine ID Code Example: V0101CLJ- (V = Plant, 01 = Month, 01 = Day, CLJ = Engine Suffix Code) So what do we have so far in this example? did comply with sections 33102 and 33103. VIN stamping would 18A174373. Early blocks will have just the ID code, whereas later engines (usually from 1968 on) will also have a partial VIN stamped with the ID code as shown in our example here from a 1972 Corvette with 350 small block with TH400 trans. For example, when it comes to service blocks and crate engines you generally will not get a full engine ID because there wasn't an original application. The entire engine Code contains the assembly plant, month and day along with the engine suffix Code. By Year (1964-1972). - compliance Plate THIS SITE IS OWNED/OPERATED BY AN AUTHORIZED GM RESTORATION PARTS LICENSEE. This ledge is below the deck of the block and the next to, or under the engine code ID. Real idenity is the number stamped on the passenger side head coding it to a camaro and such, but those numbers can be forged. Chevelle, Camaro and Z-28 115, 130, 145, 150, 160, 165, 170, 175, 180, 185 & 245 HP 2.0" Outlet A.I.R. details accurate. Four bolt main blocks are desirable in high performance applications because the extra strength of the additional bolts keeps the bottom end rigid and less prone to failure. In 1987 CLJ is a 305 L69 in a monte carlo, or in 1971 it's a 400 from a if (ie||dom){ But numbers correct is not numbers matching. VIN Code Format the General Motors division (Chevrolet's number is "1"), followed } Note:CODE CExxxx (counter or crate engine) was used from 1968 to current year. Small Block Chevy Head ID. the most accurate and up to date information to the Chevelle community can These casting numbers are well known and documented on several prominent websites such as Mortec and through numerous Chevy ID code books. Passenger 195, 200, 220, 250 & 275 HP 2.0" Outlet A.I.R. Click here for Chevy Engine Code Listings. Where Are Chevy Small Block Casting Numbers Located? The Chevy big/small-block engine VIN (vehicle identification number) is a combination of digits that indicate the type of vehicle the engine is installed in, the model year, and the assembly plant. end of story. http://428cobrajet.org/id-block.html The suffix codes essentially tells you what the engine was originally installed in on the assembly line. Well show you what to look for in this buyers guide. In this case V stands for Flint, Michigan. // window.onload=random_iframe, Webs By The CML that follows is the suffix code. rough cast area next to the oil filter and sometimes the stamping is Rob Wagner is a journalist with over 35 years experience reporting and editing for newspapers and magazines. randomcontent[1]="http://www.chevellestuff.net/sidebar/random02.htm" Corvette, Passenger and Truck 195, 200, 250, 275, 300 & 350 HP 1.9" Outlet A.I.R. These numbers are found after removing the valve cover on the head. sixth month, June. An adaptable, detail-oriented, world-class automotive technician with a demonstrated track record of experience in product/technical support, automotive shop management, diagnostics, root cause analysis, maintenance/repairs, quality assurance, customer service, training and mentoring, and staff supervision. Here T099 represents Tonawanda (T), September (09), 1969 (9), Warranty engines will be date stamped on the starter mount pad. In this example "06" or the Some have already been mentioned throughout this article and others are listed here as well. one produced in 1971 at Tonawanda with engine serial number 73170. for Chevrolet Case or "CT" for Chevrolet Transmission. This is why I looked at the VIN code 1st. technical service bulletins to indicate which engines were to recieve a vin stamp, so who knows what assembly date and ID letters. partial VIN, generally, only the 396 engines from 1965, 1966 & 1967 Proven aptitude for maximizing customer satisfaction and ensuring safety/compliance. For example, the engine serial number V1015CKX is decoded as: Another example is the serial number T0525ED: The engine serial number is located at the front passenger side of the block, right next to cylinder #2. The engine assembly date must precede the car build date (often by a few days), otherwise something is amiss. vx ledge forms the mating surface between the block and the transmission The CE block stamp year is the year the block Depending on the year and plant, the partial C, Chapter 331 (effective January 1, 1968)." All these are identified here. On some Saginaw blocks, intakes and exhausts a "clock" was cast into the block. These codes are great to have on hand when shopping at the local swap meet or salvage yard as well. Over the course of 50 years there were many different versions made. home These engines offered great performance with increased horsepower over the standard equipped 350 motors. any registrant may be used by WBD for display on any other WBD website without When people say "It's numbers matching" - what they mean is the engine (or other component, i.e the transmission) can be MATCHED to the vehicle it was originally used in. The format consists of divisional identification The engine VIN I cant find facts on, but the block stamping came back as a 1957 sb, 2 bolt main possibly a 265 or 283. for "Title 49, United States Code, Subtitle VI, Part C, Chapter Chevrolet issued model year, a letter for the final assembly plant, and followed by the The format consists of divisional identification number, model year, assembly plant designation and vehicle serial or sequence number. Corvette 300, 330, 350 & 370 HP 2.0" Outlet A.I.R. SBC BBC V6 Chevy Engines Specs and Sizes [With Chart], Chevy Big/Small Block Casting Numbers Lookup. Chevelle, Camaro, Nova and Passenger with A.I.R. Chevy Small Block Engine Suffix Codes for CID 350 . It's important to note that 1970 Atlanta example of the partial VIN stamped on the engine pad. by the same information as before; the model year, plant, and sequence next to, or under the engine code ID. Casting Date Example: E038 (E = Month, 03 = Day, 8 = Last digit of model year (1978)). This is the "CE" Is it the original for the vehicle? If you're looking at the casting # information and it mentions a "gang stamp" as shown in the photo above. See // window.onload=random_iframe, Mac's under Warranty. Tonawanda Look behind the distributor on the passenger side of the block if it is a six- cylinder GM motor. Even There are over 1600 pages on this website. models Quickly, A = Chevelle, F = Camaro, X = Nova. Beginning January 1, 1968 the federal government requested voluntary engine that was stamped "CE" with a 6-digit number following characters into one even line for stamping as opposed to each character 6 cylinder engines are stamped on the passenger side of the block behind the - engine numbers Here's See bellhousing. example, 6A174373 decodes to 1966 Atlanta final assembly, and the last Reading section A calendar year 1973 replacement engine #356957, A calendar year 1973 replacement engine #367742, Warranty engines will be date stamped on the starter mount pad. The point of this page is to help you figure out how to decode stuff. one change was made in 1968. First are a set of Casting Numbers, the second are a set of Stamped Numbers. date and suffix code. (Today many people describe 1970 F-body cars as " (NOTE: earlier 327 engines used that same flange, but they were small main journal cranks, and would not normally fit a 3970010 block.) In 1972, plant codes changed to reflect the VIN code. A 1973 motor for instance would be D3, as an example.For example, the Chevy engine casting number 14316379 means; CID: 350, Years: 68-88; Block Casting Number Location. The GM division number ('1' for Chevrolet) though some plants elected to stamp partial VINs on other locations If those numbers are missing or look funky I would not pay any big bucks for it. stands for "Chevrolet Engine" var randomcontent=new Array() Required fields are marked *. hx 25, 1967. The Chevy small/big-block casting number is located at the back ledge of the block behind the driver-side cylinder head, next to cylinder #7.In order to identify a big block . Below is a summary of all the letters and numbers that point to the specific assembly plants. The suffix portion tells you the original application, vehicle model, engine RPO/ transmission / horsepower, etc 283 blocks (3.875" bore, 2.3" main), 302/327/350 blocks (4" bore, 2.3" or 2.45" mains), and 400 blocks (4.126", 2.65" mains). Small Block Chevy Engine Block Identification General Engine Block Specifications While 6 different bore size blocks have been produced, the small block engine can be classified into 3 bore sizes and 3 main bearing sizes. Chevelle and Passenger with and without A.I.R. hg 1. The Engine Suffix Code is stamped on a block pad located immediately forward of the right hand or passenger side cylinder head. The plants These two numbers are the casting number and engine ID code. The engine date must precede the car build date, otherwise something is amiss. (for example, CTY = 1970 396 Camaro, 375 hp, 11.0:1, TH400). There are two sets of numbers that will help determine this. It contains information about the vehicles assembly, power output figures, the make and model of the Chevy vehicle, as well as the engine displacement. In 1968 the main bearing saddles were increased in size from 2.3" to 2.45". like this was not mandated but was voluntary to comply as long as they number, model year, assembly plant designation and vehicle serial or sequence number. being individually stamped. The final digit could be a year code. The primary pieces of information you'll decode are the; The engine code and partial vin # will accuratelynaildown whatever the thing is rather quickly, and the other information will fall into line with that. the General Motors division (Chevrolet's number is "1"), followed Beginning January 1, 1968, by federal mandate, all engine blocks They are located on the drivers side rear of the block on the flange forward of the bellhousing. The point of this article is to help you figure out how to decode stuff. Step 1. LS-5. document.write('') It's a small block Chevy built in Mexico somewhere near August (or possibly June) 23rd of 1996. same information about partial VINs on engine blocks also applies to These four digits are the numeric code for the day and month. The location of this code depends on the type of engine, typically as follows: Talk to the experts. Chevelle, Camaro, Z-28 and Nova200, 210, 250, 255, 290, 300 & 360 HP 1.9" Outlet A.I.R. The "CE" Are you looking to have the information of your SBC or BBC engine using casting numbers? Or has the transmission been changed? This suffix code is where the gritty details can be verified, as the suffix code will provide original assembly line application, horsepower, and much more. If you think there is something in error, sites such as The code consists of an assembly plant code, date of production and suffix. Early blocks will have just the ID code, whereas later engines (usually from 1968 on) will also have a partial VIN stamped with the ID code as shown in our example here from a 1972 Corvette with 350 small block with TH400 trans. In some vehicles, the casting number is situated on the passenger side ledge, next to cylinder #8 (on some later production blocks), Look up what you engine blocks casting number means here: Chevy Big/Small Block Casting Numbers Lookup. Specific numbers identified the time period it was built and its horsepower range. The 327 Chevy engine is stamped on a machined pad on the front passenger side cylinder head usually behind the alternator. A "two-bolt" main, or a four-bolt main. - body id plate This match is done via the PARTIAL VIN stamp on the component. the "CE" designation for replacement Chevrolet engines did The digit denoting the month is usually a letter between A and L but can include numerical numbers in some instances, with 1 indicating January and 12 indicating December. var iframeobj=document.getElementById? var iframeprops='width=950 height=250 marginwidth="0" marginheight="0" hspace="0" vspace="0" frameborder="0" scrolling="no"' the "CE" and year designation. It doesn't indicate what the original equipment was. //Specify IFRAME display attributes Some folks use these terms loosely, or will say "numbers correct" or something to that effect. Post a picture of the stamping on the front pad of the block and we can take a look at that. at different locations on the engine block. Copyrighted 2002-2017, This is my opinion, and the generally accepted norm: CHEVROLET BY THE NUMBERS, 1965-69 Edited December 27, 2018 by lump (see edit history) 195, 220, 275 & 350 HP 2.0" Outlet Chevy II A.I.R. //This credit MUST stay intact for use It's been reported that beginning in 1970, if more engines were needed 24502572, Type your crankshaft casting number in the SEARCH BOX below. This Lastly, in extreme cases, you'll want to verify the numbers stamped onto the component were the ones stamped into it originally and aren't restamped. original engine, while it was under warranty, it was replaced with an If it does - it's "numbers matching", the plant would re-use the numbers using the letter "A" after number, model year, assembly plant designation and vehicle serial or sequence number. To LS-5 & LS-6, Corvette 270, 365, 390 & 425 HP with and without A.I.R. The engines VIN is important to some, since its matching with the cars VIN would mean the engine is the original one that came with the vehicle. The entire engine Code contains the assembly plant, month and day along with the engine suffix Code. These numbers are stamped into a machined pad in front of the passenger side cylinder head more than not its covered up by the alternator. stamped. document.getElementById("dynstuff") : document.all.dynstuff Note the "A" in the CE0A61217 stamping on the engine pad. Often referred to as a gang stamp because the partial VIN characters Six Cylinder: Passenger side of the block behind the distributor. There is another type of stamping found on some blocks. WBD shall not be held liable for any loss resulting from a "gang stamp" as shown in the photo above. a comparable production engine. But if you want to know EXACTLY what like this was not mandated but was voluntary to comply as long as they in your browser's window when reporting it. In 1972 and on, it was simply "N". CE stamping 073690 from 1970 and date stamped T109. The serial numbers are registered to Chevrolets engine block registry to ensure easier identification. Here T099 represents Tonawanda (T), June (06), 1973 (3). replacement for any number of years' engines, applications, and for Small Block Casting Numbers Lookup Type your engine block casting number in the SEARCH BOX below. stamp could be applied. The engine code and partial vin # will accurately nail down whatever the thing is rather quickly, and the other information will fall into line with that. See what we're doing at Ground Up SS396.com. So what do we have so far in this example? Engine ID Code: V0801CML (This ID is completely made up), An Early Chevy Small Block Casting Date Code, Chevy Engine Casting Numbers Decoding Help. My point here I guess is trying to decode "3970010" is almost pointless. 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. Notes (for below):"High Power" is the maximum rate HP this block was used for, "Low Power" is the lowest rated horsepower RPO engine the block was used in. Small block casting date is located on driver side rear of block on flange forward of bellhousing. Can you tell me what year this engine is You know its a small block Chevy, but you want to know a bit more about it. Chevrolet Performance 19210009 SBC 350 HO Turn-Key Crate Engine. Of the thousands of available suffix codes, this one shows four possible applications, ranging from a 1975 Camaro with 155HP to a 1980 Z-28 with 190 HP. 45 years in auto/truck industry. pad (in front of the cylinder head), or on the transmission flange somewhere. = Air Injection Reactor, AT = Automatic Transmission (specific type uncertain), FI = Fuel Injection, HDC = Heavy Duty Clutch, MT = Manual Transmission, TBI = Throttle Body Injection, TPI = Tuned Port Injection, TH = Turbo Hydramatic Transmission (model uncertain), TH350 = Turbo Hydramatic 350 . is located on a ledge found at the rear of the block, most often on would be stamped with a partial VIN consisting of a single number for (1) There is a question as to whether - trim codes code. Any entrepreneur or entity interesting in buying my website and the two The numbers that follow are the actual assembly date. Note: CODE CExxxx (counter or crate engine) was used from 1968 to current year. I'm trying to decode the engine code stampings on the front lip of the cylinder heads on the passengers side of the vehicle. by the oil filter. C, Chapter 331 (effective January 1, 1968)."