The entire engine Code contains the assembly plant, month and day along with the engine suffix Code. In. The last H stands for 4bbl Holley Carb. Copyright © 2021 Impalas.org. Following the transmission type, was the model year, month and day of the month. Starting in 1970, the serial number is stamped either above the oil filter, somewhere on the block pad (in front of the … B: Cleveland TH350 Chevy Impala Bel Air Caprice 210 Nomad Biscayne Kingswood SS Vin Decoding Casting Codes Cowl Information RPO & Dealer Options Production Numbers Car Clubs. Here are the engine block casting numbers used for small blocks and big blocks. 6Y204760 – partial VIN# from a fullsize Chevy built at Wilmington, DE. Used after January, 1966. That is followed by the day of the month it was cast and the year. Saginaw 3-speed and 4-speed code location. The car does have dual exhaust. However three years before in 1963, the 427 was offered to a lucky few as a RPO (regular production option) for the Chevy Impala and was known as the Z11. 69B350  69 TH400 for use with 427 (L36) engine assembled on December 16th. P1410 Fuel Tank Pressure System The use of I for 1 on engine assemly codes is VERY common. This full transmission code will be found on your Protect-O-Plate if it still with your car. The L5 on the Carter seems to go along with the originality of the car. All other blocks used a Month, Day, Year format. A specially packaged SS 427 Impala debuted in 1967 and carried on alone after the base Super Sport was discontinued in 1968. In 1966 the Caprice was dropped from the Impala series to become its own line. It's not a high-dollar car and I won't be representing it as anything other than a fun top-down driver, but I do run all the numbers just the same. CY 427 engine (L72). For all transmissions except the TH400, these are the transmission type codes used. I recently purchased this car with the understanding that the 327 engine is original and I'm pretty sure it is by the date and numbers. K – McKinnon Industries, Canada (L6 and small block V8) ALUMINUM [unpainted/natural] ... DULL ALUMINUM [KRYLON dull aluminum 1403 or Bright Beauty Engine Enamel #BB415] DASH-bezel speedometer cluster-speedometer spacer. a.i.r, p/g: gp: 6 cly. The gear set was installed in a carrier, also referred to as a “pumpkin” that could removed from the front side of the axle assembly as a complete unit. Check the engine code suffix against a Chevrolet code listing. Prior to the 10 bolt/12 bolt rear axles that came out in 1965, the axle housing was the same for all ratios. It will be a D for Dana, E for Eaton or W for Warner. Y: Toledo TH350 Paint and Repair Basics. Multiple casting numbers were sometimes used for the same application in a model year. I appreciate the feedback. In 1964, the axle code was stamped on the front, right side of the differential carrier housing. Very simple for your car. It is located on the rear, top left (driver’s side) for all others. V – Flint, MI (small block V8 starting 1967), In the above example: The letter is the month the block was cast. JavaScript is disabled. V8 engine codes are stamped on a pad forward of the cylinder head on the passenger side of the block. 1966 Chevrolet Impala. In 1968, all V8’s had the partial VIN# stamped on the block. On 4- and 6-cylinder engines, the code is stamped on a pad on the passenger side of the block to the rear of the distributor and above the fuel pump. The casting date is on the rear of the carrier, towards the top on the driver’s side. Even though it was the top engine in the Chevrolet line-up, only 1856 L72 full-size cars were produced out of a total of 1,499,878 units built for the 1966 Model Year (0.0012%). The block casting date was either cast on the top, back of the block or on the passenger’s side between the freeze plugs. In. BB 3.36 non posi assembled at Detroit I find it odd they used I's instead of 1's. Detail Items. The Impala was still the biggest seller even though the Caprice was now the most the top model. The carrier assembly came in both positraction and non-positraction versions. W: H.D. 275 HP L35 Engine - V8, 396 Cu. The other Camaro numbers matched the rest of the car. Old 1966 Chevrolet Images. The actual application code that would be found on the broadcast sheet and that is also on the tag starts with a C for Chevrolet but the C is omitted in the transmission code. The sand has to be loose enough so that it all falls out at the first shake (when you are casting 14,000 parts a day you don't put a great deal of effort or time in getting each one to be either a work of art or clean); just open the cope and dump sand and part on the floor and pick up the part and stack it, open the next box repeat, repeat, repeat, repeat, repeat, repeat, repeat, repeat, repeat, repeat, repeat, repeat, repeat, repeat, repeat, repeat, repeat, repeat, repeat, repeat, repeat, repeat, repeat, repeat, repeat, repeat, repeat, repeat, repeat, repeat, repeat, repeat, repeat, repeat, repeat, repeat, repeat, repeat, repeat, repeat, repeat, repeat, repeat, repeat, repeat, repeat, repeat, repeat, repeat, repeat, repeat, repeat, repeat, repeat, repeat, repeat, repeat, repeat, repeat, repeat, repeat, repeat, repeat, repeat, repeat, repeat, repeat, repeat, repeat, repeat, repeat, repeat, repeat, repeat, repeat, repeat, repeat, repeat, etc. 1966 Chevrolet Impala SS 396 4-Speed “Real” SS – VIN Code: 16837. R: Saginaw 4-speed Sixties GM Body Codes. Decoding small block Chevy engine suffix codes and stamped numbers: HR - TBS. In 1966 if your second and third digits of the VIN are "67"or "68" then it is an Impala Super Sport. The following is a list of TH400 application codes used only on the full-size Chevrolets. I have found that GMC had For example, 365 would be the last day of the year, December 31st and 1 would be January 1st. Muncie 3-speed (69 only), Examples for 1964-1966 transmission code format: Examples for 1967-1970 transmission date code format: In 68-69 model cars, the serial (VIN) number of the car the engine was installed in is stamped next to, or under the engine code ID. 04 – 4th day of the month Impala Engine Options: 1966 By Randy Bolig February 10, 2016 The 396 cubic-inch big-block came with a Quadrajet four-barrel carburetor, and delivered 325 horsepower. I HAVE A 1966 CHEVROLET IMPALA SS. P0301   Muncie 4-speed assembled on March 1st. The different kinds of codes used will be detailed below. H: H.D. Powerglide and TH350 code location. M – Aug, P – Sep, R – Oct, S – Nov, T – Dec. The next group of numbers is the Serial number or unit built number, all series at all plants started with Serial number 1001. a.i.r, hdc: fw: 6 cly. What can be found on the axle housing is the stamped axle code with assembly date, housing casting number and date housing was cast. 67A509  67 TH400 for use with 396 engine, assembled on May 24th Engine Size: Engine Horsepower: valve Size (intake/exhaust) - combustion chamber volume: 3884520: 283: 195: 1.72/1.50 - 60.530 c.c. CA 396 engine (also 350 engine in 1969) B: Buffalo axle plant. GM reports 1,865 L35 engines ordered as options and these would have been installed in the El Camino series. Here is the stamping: FIII6HCH. More. a.i.r: fv: 8-396 t/h: iv: 6 cly. The Impala was still the biggest seller even though the Caprice was now the most the top model. Transmission Codes; Rear Axle Numbers; Engine Pad. Sample 1964 axle code: AB1202 2.02/1.60 - 62.076 c.c. One exception was in 1964 when the first letter of the application code was the plant. T: Toledo Powerglide The Chevy 427 V8 was produced officially for the masses beginning in 1966. DH: 3.31 12 bolt rear axle with positraction The Impala line was little by little losing its fame and popularity to other Chevrolet models. P1418 Secondary Air Injection System Relay A Control Circuit High. Documented Restoration with Pictures, Notes and Receipts. P: Muncie 4-speed In 68-69 model cars, the serial (VIN) number of the car the engine was installed in is stamped next to, or under the engine code ID. The transmission code consisted of the type of transmission and the date it was assembled. This engine was designed basically for the Corvette line, but was available as an option on the full size passenger car side as well. Is this normal or common? CM 307 engine a.i.r, p/g,taxi: … - Answered by a verified Chevy Mechanic The letters used for the month were not the same exact as those used in the engine casting date. One of the reasons I mentioned the I stamping to start with is it reminded me of a 69 Camaro I had once that had 2 different identification codes stamped under the cowl. The rear axle casting date uses the fame format as the engine casting date. The engine is install in a 1963 Impala conv. The best way to determine a true Impala SS from 1964 thru 1967 (inclusive) is to verify it via the VIN. The location of that code was behind the distributor on L6 engines and in front of the passenger’s side cylinder head on V8’s. Your source for Impala, Caprice, Belair and Biscayne information. Manual In. Or did they use 1's at all? In. T – Tonawanda, NY (small block and big block V8) R – Rochester carburetor (Carb designation used only in 66) But not back in the early sixties when they had hundreds of people working in the foundry with hot molten metal (1,850 to 1,960 degrees) stacking fragile sand figurines in a sand box with dirt and dust everywhere. I have a 1966 327/275 camel hump head engine block with the engine code HCH. The Chevrolet big-block 427-cubic-inch engine was available on some Corvettes, Camaros and full-size Chevrolet Cars produced from 1966 to 1969, when the engine was replaced with the 454. The '66 Impala featured more chrome both inside and out. The casting number is located on the front of the carrier on the bottom right corner. Engine Identification Numbers: L6 – The engine identification codes are located on a machined pad on the right (passenger) side of the block behind the distributor. C: Cleveland Powerglide IV code 325 hp 396 engine. The L35 396 cid 8-cyl engine was the base, or standard, engine in the SS396. SW is station wagon. 3890462: 327: 275 350: 1.94/1.50 - 62.076 c.c. T – Tonawanda, NY engine plant From 1964-1967, the partial VIN# on the block was stamped on all engines with at least 300HP. IG – 396/325HP engine with Powerglide transmission C1210   Cleveland Powerglide assembled on December 10th This is not streetable but could be with some work, wi... More Info › K: McKinnon 3-speed. with a 4-speed manual (HCH is for a powerglide I believe). The cowl tag build date is 11C. The base engine for the SS396 series for 1966 was the L35 396cid 325hp engine. There were 3,099 375hp L78 engines installed in 1966 Super Sports and El Caminos. 1965 and up Muncie 4-speed code location. 1966 Chevrolet Impala Drag Car Runs low 12 , 355 Engine 513 rear gears 2 speed powerglide,engine is a dry sump Clear title Good project. On small blocks, the casting date was located next to the casting number. 1964 Muncie 4-speed code location. Axles were assembled at either Buffalo (code B) or Detroit Gear and Axle (code G). PAINT COLORS-1966. The assembly code consists of the application code, assembly date and assembly plant. Your email address will not be published. The Julian date in the transmission code started at 1 for January 1st of the start of that model year and continued past 365 until the end of production. The 427 became extremely popular due to its versatility and of course massive amounts of horsepower. AR=Air Injection CA= California HD= Heavy Duty: HDC= Heavy Duty Clutch HP= High Performance: PG= Powerglide MT= Manual Transmission: MT-3= 3 Speed Manual SHP= Special High Performance For help go to engine Code help or engine decoding FAQ . If your Second and Third digits are "63" or "64" you have a standard (non SS) Impala. The Impala was a more deluxe Chevrolet with a color accented full … Pretty much all transmissions used the same format for the code except the Turbo 400. Automatic The following will be a table of application codes for the axles used in the full-size Chevrolets. There were 72,272 SS396 sport coupes (66,380) and convertibles (5,393) sold. A 3844422 block has been found from a early 65 409/400 motor stamped with the JA engine suffix and Wilmington, DE partial vin. Hope I am making sense as I am a diabetic up after five hours sleep because my sugar levels are crashing and I have to eat something before I die, could be mildly delusional at this point. 1966 275 hp 327 question. At the beginning of the line there is a guy making the cores (packing green sand in a mold called a pattern to stack inside the box (called a cope) to make the parts and he does the exact same thing tens of thousands of times over and over again. Y9E10   1969 Toledo TH350 assembled on May 10th Muncie 4-Speed Transmission. Chevy offered its last full-sized SS 427 in 1969. CQ 427 engine (LS1) 62 & Earlier Chevrolet RPO Codes; CD 327 engine 3872702: 396: 325 - 360 ©2014, Full-Size Chevrolet Research Group 425 HP L77 Engine - V8, 283 Cu. The Chevy by the Numbers book say the code on this engine means Holley but that they sometimes used Carter AVS. CF 427 engine (LS1 with 2.29:1 axle) E 13 5 would be May 13th, 1965. P1408 Intake Manifold Pressure Sensor Circuit. http://craigaacars.shutterfly.com/pictures, VerticalScope Inc., 111 Peter, Suite 901, Toronto, Ontario, M5V 2H1, Canada. 1020: Assembled October 20th Engine Code – IVR would be a 1966 (determined from the casting date) 396 engine, rated at 325 hp, equipped with a Turbo-Hydramatic transmission, installed in a passenger car (the ‘IV’ portion of the engine code), and equipped with a Rochester four barrel carburetor (the ‘R’ portion of the engine code). gasoline (petrol) engine with displacement: 6996 cm3 / 426.9 cui, advertised power: 317 kW / 425 hp / 431 PS ( SAE gross ), torque: 624 Nm / 460 lb-ft, more data: 1966 Chevrolet Impala SS Sport Coupe 427 V-8 Turbo-Jet 425-hp 4-speed close (man. N = 1960-1961, J = 1962, G = 1963, F =1964-1966, E = 1965, D = 1966. In 1966 the Caprice was dropped from the Impala series to become its own line. The Gridiculous Theme by bavotasan.com. Passenger’s side of the transmission oil pan. A – Jan, B – Feb, C – Mar, D – Apr, E – May, H – June, K – July, P1409 EGR Vacuum System Leak - Read Our Article on EGR Valve Codes For Help With This Chevy Check Engine Light Code. For a better experience, please enable JavaScript in your browser before proceeding. The new power house for 1966 was the 427 big block. 04 – April a.i.r, a/c: fy: 1966: 6 cly. Tilt Steering – ididit system. ... Chevy Engine Codes (Lots of Engine Related Information & Numbers) Chevrolet Fullsize Options. Pyramid casting symbol: 3782461: 327: 275 350 (late March) 1.94/1.50 2.02/1.60 Double-hump casting symbol produced to about June, 1966. Info and Specs for 1966 Chevrolets. Every buyer must check Chevrolet IMPALA car history before getting a car loan or credit. The engine pad was stamped with the engine assembly plant, assembly date and application code. Buying a used car? The 64 and 65 409 blocks, used a date code that stated the day of the year the block was cast. Go get a hand full and see how good you are at making an inverse imprint that looks like a one instead of the capital letter I. P1410 Fuel Tank Pressure System. Passenger’s side, rear edge of the main case. 2nd & 3rd digits – Series – 11 = Biscayne L6 12 = Biscayne V8 13 = Biscayne Fleetmaster L6 (1960-61) 13 = Impala SS L6 (1964) 14 = Biscayne Fleetmaster V8 (1960-61) Displacement: Horse Power: Turbo-Thrift 6-Cylinder: 250: 150: Super Turbo-Fire/Turbo-Fire V-8: 283: 195/220: Super Turbo-Fire/Turbo-Fire V-8: 327: 275: Turbo-Jet V-8: 396: 325: Mark IV V-8: 427: 390/425 In. This Casting number is usually found at the rear of the block on the left or drivers side on top of the bellhousing flange. Position: Lower. Come join the discussion about engine swaps, performance, modifications, classifieds, troubleshooting, maintenance, and more! a.i.r, hdc, a/c: an: 6 cly. 427/425HP "L72" Engine The 427/425 HP L72 engine was the pinnacle of performance for Chevrolet in 1966. It was possible to change gear sets simply by swapping the pumpkin. A forum community dedicated to Chevrolet Impala owners and enthusiasts. P1415 Secondary Air Injection (AIR) System. Driver’s side of case below side cover. What we have left is the "suffix code" which in this example is ED, a 1966 396cid with 325hp and coupled to a manual transmission. Version: Thursday, 12-Nov-2015 09:33:20 EDT. 1966 Impala Paint Schemes. The Engine Block Casting code is one of the best ways to identify a Chevy engine block. 390 HP L72 Engine - V8, 427 Cu. Considering the volume they produced these parts with a technology that hadn't changed since the Chinese invented sand casting in 800 BC I would say the difference between a 1 or an I is pretty minimal. 1202 assembled December 2nd, A sample 1965-1969 rear axle code would look like DH1020B which decodes to the following: Starting in 1965, the axle code and date are stamped on the front of the axle tube on the passenger’s side. They are quite literally using sand to cast these parts. The same block could appear in both 2-bolt and 4-bolt main configurations, depending on application. So this attractive 1966 Impala convertible came in this morning. 325 HP L36 Engine - V8, 427 Cu. Power Disk / Drum Brakes. All indications from the engine code are its the original engine for your 11C car. It is located on the top, rear of the block on the passenger’s side. Both the 396 and its 427-cube Mk IV running mate were available for the 1966 Impala SS. Engine identification may be determined by finding the engine block VIN and the engine application code in the following tables. Year: Code: Model: CID: HP: Trans: Comment/RPO: 1961: Q: Impala: 409: 360: 4sp: 580, HP Solid Cam/11.25 For example, the application code may be CB but in the transmission code itself, only a B will be used. Although there were engine suffix codes assigned to 1966 L79 Chevelle engines, Chevrolet production numbers indicate no RPO L79 options were ordered/sold in 1966 Chevelles. The code for the 427/425hp L72 in a '66 full-size Chevy is "ID"; that engine is backed by a manual transmission. Come to find out they built Firebirds there too and someone evidently wasn't paying attention and stamped the Firebird number first. 12 Bolt Rear End (believed to be DD Code) Power Steering. Transmissions assembled in July would have a date in the 500’s. On positraction axles, a letter for manufacturer of the posi unit will appear under the assembly code. Those cases are rare. etc. If you want to keep your vehicle safe on the road for many years to come, go with this Gates product. Note: Partial VIN number from Janesville, WI plant. This engine had a Carter carb on it too. ... (although sources vary on how accurate any lists of these option codes might be). A is January, B February, C March, I September, L December. Choose Group to View Small Block Engine Suffix Codes Select Suffix Group #* - B* C* - CZZ D* - FZZ G* - KZZ L* - SZZ T* - TZZ U* - ZZZ 262, 265, 267 302, 305 or 307 327 350 400 ALL (very big) One was in the usual place, and started was a N900000 number. However, some can be several months earlier or longer. The 1966 Chevrolet Impala Series measures 79.90 inches in width, The 1966 Chevrolet Impala Series measures 213.20 inches in length, and has a wheelbase of … 1966 Info and Specs. Gets kinda boring if your job is to open the sand boxes and stack parts. CG 396 engine (with 2.29:1 axle) 1966 Impala engine code stamping. The L72 427/425HP Engine. L30 Engine - V8, 327 Cu. The L78 engine option was canceled early in 1965 and reinstated October 7, 1965. P1409 EGR Vacuum System Leak - Read Our Article on EGR Valve Codes For Help With This Chevy Check Engine Light Code. For example, transmissions built early in the model year in August and September would have a date code in the 200’s where as those built after January 1st would start from 366.

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