Pontiac 400 engine codes XR: V8 Pontiac Engine Codes Jul 6, 2009 · If you have this transfer lug, you have a non-389/400 engine that dates 1959-present. Starting in 1965 Pontiac began using a 2 digit 400 engine codes; year: model: codes: 1967: gto: xm xl wt ww ys xe ws wv yz yi (ram air) xs yr xp: 1967: firebird: wz wu yt (ram air) wq xn wi: 1967: fullsize: xa xb wa wb wm wn ya yb yc xv yd xu yu yv xc ye xw yf xx yx wd xt we wy xy xz yl xh xj wf Learn how to identify and decode Pontiac V8 engine codes and specs from 1955 to 1981. r. However, these codes were used for more than one year and could have different machining or even different main caps. 4:1: 300: Manual: 7F6: 68: 4 1968-69 Pontiac engine codes decoder reveals the code prefix, engine performance, displacement, and configuration. Letter represents month, first digit day, second digit year 400 blocks with 557 casting numbers 1967 400 9786133: 1968 22P100001 -Engine VIN Code added late 1967. YH: V8-400 2, 16. 11/1. Engine Block Codes Pontiac engines have block code. The above 3 bits of information are all you need to very closely identify which engine you have. Sep 23, 2006 · 1970 Engine Codes Code: Application: Displacement: Compression: Horsepower: Transmission: Heads: Camshaft: Carb: W7 : 350: 8. Top number is an engine production number (explains starting with a 6) and under is the YF code. engine number 532727 through 1974 Pontiac V8: Dark Blue: Used for all mid-73 thru 74 Pontiac engines including the 73-74 SD-455. HYDRAULIC VALVE LIFTERS the pontiac w72 400 engine. THE BLOCK . 73 12 bolt 11. The casting numbers are typically stamped on the side or top of the cylinder head and are sometimes accompanied by other markings such as date codes or part numbers. 6 Litre engine and was capable of low to mid 15 sec quarter mile times at a little over 90 mph in a new Trans Am right off the showroom floor. 6: 111: 543796: 2: 64: NA Aug 19, 2022 · In my case, the code is YS, which for a 69 400 means it's a 350 horse 400, automatic transmission, 067 cam, 4bbl carb (7029268), likely with '62' coded heads. John Wallace - johnta1 Pontiac Power RULES !!! www. 24@118. The block code and head code (numbers and letters) are where the value is. Next to the distributor hole there is a casting number that has a letter with 2 or 3 numbers. Pontiac Engine Decoder YEAR CODE C/I HP TRAN CARB CAR MISC 1967 XM 400 255 1967 WF 400 255 A 2 AC 1967 WM 400 255 M 2 EMMISIONS 1967 WN 400 255 M 2 EMMISIONS 1st photo places where codes are usually found in a 400-455 engines. 400: 1968 400 cid #9790071 1968 400 ra #9792506 1967 428 cid #9792968 1969 350 cid #9790079 1969 400 cid #9790071 1969 400 ra iv #9792506 1969 428 cid #9792968 1969 303 cid #546313 1969 400 ra v #9792968 1969 428 ra v #545887 1970 350 cid #9799916 1970 400 cid #9799914 1970 400 ra iii #9799914(4-bolt) 1970 400 ra iv #979991(5)(4-bolt) 1970 400 ra v The W72 was the last Pontiac high performance car engine. But '78 was the only year that the X7 code was used on an XX block. There are two exceptions to this rule (like any other) and those are the 1961-62 421 Super Duty, and the 1973 Super Duty 455. Block codes and engine ID numbers are found on a machined pad on the front passenger side of the block, next to the water pump housing, just below the leading edge of the cylinder head. About Contact Parts For Sale. And to decode this information: Pontiac Engine Block Codes Feb 12, 2009 · Casting number - good. The Z in the VIN lets you know you have the Pontiac 400. WQ: V8-400 2. I have listed the Pontiac 400's, Olds 403, etc. A single valve spring with internal damper is used on 301 VIN code Y and W engines. com Winner of Top Class at Pontiac Nationals, 2004 Cordova Nov 29, 2013 · For 1970, there were at least 11 different recipes for the 400 engine alone. Correct four barrel intake with part number 25355 and is date coded E287 which is May 15 of 1977. 6A4-4 Cylinder Head - Typical guides. Let’s look closer at a Pontiac W72 engine and the codes that separate it from the regular 400 V8. GM FoMoCo MOPAR Gaskets Pontiac 400 428 455 Engine Codes; In 1977 the 400-cubic-inch (6. 6, (RPO code W72) was created to fulfil the performance engine gap in the Pontiac line-up. YS: V8-400 2. Dual valve springs are used on 400 VIN code Z engines. WS: V8-400 1. Mar 31, 2010 · Block and Engine Codes: Quote: Pontiac engines have block code. XP: V8-350 1. the L80 is the Olds engine (which would have a K in the VIN)" Feb 16, 2011 · I too came across this discrepency but found on Wallace Racing's Pontiac Engine Code Search 1969 400 370 HP WW M 10. To see where the block code and date code are Pontiac used the same codes on different year blocks. The Q-jet on the 1968-1969 GTO did not receive the Q-jet with the Secondary Air Valve Lock Out lever. Apr 2, 2006 · The only thing special about a 70 WT is the block code stamping and the #12 heads. The date code is crucial for verifying when the engine block was cast, which helps to determine the engine’s originality or matching status with the vehicle’s build date. "In 78, there will be a partial VIN on the block. The base engine for the '69 Bonneville was the YH coded 428. 75: 2 bbl: 8. The W72 offered many improvements over the standard L78 400 Pontiac. Pontiac: 400: 4. wallaceracing. I guess some engines have three numbers stamped. However, these codes were used over from year to year. 6A4-3 Cylinder Block 400, VIN Code Z Fig. Above the 2 digit code will be the motor unit number, which is either 6 or 7 digits. Together with the casting code and casting date you can determine where what the engine is. 66" The 6X-4 and 6X-8 were the only heads used after 1976. ===== Stampings on 46 Head Code Just some more codes and sub codes for the 46's. 2nd photo 403-455 olds engines (1)400 engine (2)403 engine Sep 23, 2006 · 1968 Engine Codes Code: Application: Displacement: Compression: Horsepower: Transmission: Heads: Camshaft: Carb: WA: FullSize: 400: 10. The engine VIN code is unreadable due to placement by water pump/timing cover. The 350-400-455ci PONTIAC 1970-71 Pontiac engine codes decoder reveals the code prefix, engine performance, displacement, and configuration. The engine code will be two letters. And it has a shorter stroke crank--3. In most cases, the block VIN and the vehicle VIN were the same, but by late 1967, the block VIN was revised. 6 offered a much higher level of performance than the base 6. W AND Z 6A4-3 - Fig. Some - or most - were drilled and tapped for 4bolt mains. Apr 16, 2015 · Block Code and Engine ID Number . A list of block casting numbers is located < click here > Nov 27, 2017 · Motor out of a 1965 Pontiac GTO Tri Power Reggie Horning 1970 Pontiac 400 V8 with #13 Ram Air Heads and Firebird Ram Air Exhaust Manifolds Reggie Horning. One thing that concerns me, is that it looks like the block casting number on your engine may have been altered by someone trying to make it appear to be a 1970 Ram Air IV block (casting number 9799915). Contrary to rumors and some magazine articles, the SD-455 did not have a unique color. 1977 Pontiac 400 Engine XA Code, Original GM Used Rare original 1977 Pontiac 400 Engine XA Code. Aug 18, 2022 · Check out this post in the FAQ section: Reference: How to identify your Pontiac Engine. In 1977 Pontiac offered a new high performance engine package for the 400cid motor in the Can Am, Firebird Formula and the Firebird Trans Am. 6:1: 265: Manual: 142: 254: 2 bbl: WA Oct 24, 2024 · 9790071: A 1968 400 cubic inch V8. Pontiac used the same codes on different year blocks. RA3 or Not? 70-73 Firebird & TA TECH. 6 L) T/A 6. Identify an engine block is very simple. 12 x 3. 21" for the 455. Where to find the Casting Code: Casting codes for 1955 to 1963 are Sep 23, 2006 · 1972 Engine Codes Code: Application: Displacement: Compression: Horsepower: Transmission: Heads: Camshaft: Carb: WD: HO 4 Bolt: 455: 8. 6: 111: 543796: 2: 64: 215: 389: M: 02B: 8. Pontiacs' last high performance engine was a genuine high 13 second runner with minor work. YH code is a base model 400 from 1974. Sep 23, 2006 · 1967 Engine Codes Code: Application: Displacement: Compression: Horsepower: Transmission: Heads: Camshaft: Carb: MN : 400: 8. WX: V8-400 2. Pulling Pontiac 400's This photo shows where the block casting number and date code are located. Together with the casting code and cating date you can determine where what the engine is. Starting in 1965 Pontiac began using a 2 digit letter code. They also show the 071 block for the WH RAIV 345 HP. 75 041 722 1-4 7029273 RA IV Block Casting # 9792506 / 9790071 According to Wallace the 9790071 block was also used for WW the RAIV. 67-69 ENGINES CODES . YX: V8-400 2. 5 c. curb weight. Note block cast July 1st, 1970. 6:1: 265: Auto: 45: 254: 4 bbl: WA This code will tell you the year it was to be used. Apr 20, 2018 · For example: 1967-1969 Firebird 400 CI engine, rated at 325 HP and 3250 lb. Y1: V8 Aug 17, 2015 · Checked my engine code/ build database, the following is the earliast 481988 casting 400 have run across. YT Jun 30, 2017 · Very very few of these entry level B series slipped out of the factory in '68 with the base 3spd manual 400 2bbl engine. Date Code. 1962 – 389 SD Code 544127; 1963 – 389 SD Code 543797; 1967 – 400 Ram Air or 428 Code 670; 1967 – 400 Ram Air Code 97 Pontiac Cylinder Head Codes Wallace Racing. The date code, L017, breaks down as follows: December 01, 1967. 8:1: 255: Manual: 11: 254: 2 bbl: WA: 455 1966-67 Pontiac engine codes decoder reveals the code prefix, engine performance, displacement, and configuration. BACK For a more complete and up to date engine codes and other information, try my search page. Together with the casting code and casting date you can determine what the engine is. Here is their answer. The workers at the engine assembly plant built the engines per the recipe for each 2 letter code. 33mph 1981 T/A 4-speed 406 Pontiac, Merrick ported 6X heads, Comp 270S cam, Crosswind intake 750 Street Demon, 3. 6A4-2 Cylinder Block 301, VIN Code Y and W Fig. 6:1: 185: Manual: 5C: 67: 4 bbl: WX : 455 3 days ago · 400-4bbl: 1111183: except TI 335/340 HP: 1967: 400-4bbl: 1111180: Alternator Codes Alternator Conversion Pontiac Engine Theory Pontiac Valve Lash Setting 6S-9 400 w/AIR, 101cc 2. 1972 LeMans 350 Pontiac H/S Drags project Nov 13, 2020 · Casting 9799914 YS Block. That engine was identical to a 1968-1969 GTO 400 CI engine, rated at 350 HP and 3506 lb. May 27, 2012 · 1978 T/A 463 Pontiac, KRE 74cc 300CFM D-ports, Howard's custom SFT, Nash Intake,QFT 950 E85 carb, TCI TH-350, 4200 converter 3. Feb 25, 2025 · In essence, the Pontiac head casting numbers are a code that helps enthusiasts, restorers, and mechanics understand the exact makeup of an engine’s cylinder head. A3: V8-400 2. WI: V8-400 2. " Pontiac 400 428 455 Engine Casting Numbers. Sep 23, 2006 · This Page Last Updated on: Saturday, September 23, 2006 11:14 PM. Codes are entered, or rather "hit" on the front right of the cylinder block (passenger side), close to the cylinder head gasket plane. V8-400 1. Just came from a 30 year parts collection, and turns freely! Pontiac Block Numbers: YEAR CID BLOCK NUMBER; 1955: 287 CID 400 CID #9790071: 1968: 400 RA #9792506: 1967: 428 CID #9773155 block with a date code of J23 May 6, 2015 · Yes, an X7 code XX 481988 block was used in W72 engines in '78, with an auto trans. March 15, 1973 starting at approx. A 400 has 50 less cubic inches than a 455. WT: V8 Casting Codes All engine blocks have a casting code. If anyone has any information on an alternate 1975 Pontiac engine color, please contact me. If it doesn't match, engine is not from the factory. Find out the engine size, block casting number, carburetor, horsepower and application of each engine code. Below is a link to Wallace Racings engine code list, it's 99% Sep 23, 2006 · 1973 Engine Codes ; Code: Application: Displacement: Compression: Horsepower: Transmission: Heads: Camshaft: Carb: WK: 400: 8:1: 230: Manual: 4X: 67: 4 bbl: WP: All I also posed the L78/L80 question to those folks at PHS Muscle cars. Nicknamed "W72", the T/A 6. Other than that, everything else is basically the same as any 70 model 400 4bbl engine. 64: 10. To find where the Engine code/id can be found. The block casting number, 9790071, is for a 1968-1969 400 engine. This engine is correct for a 1977 Trans Am with an automatic transmission, L78 option. For the front. V8-400 2. One set is from a "WP" 74 GTO, one set from a 74 "YS" GTO 350 and 1 from a "ZB". Sep 23, 2006 · 1974 Engine Codes Code: Application: Displacement: Compression: Horsepower: Transmission: Heads: Camshaft: Carb: A3 : 400: 8:1: 200: Auto: 4X: 66: 4 bbl: A4 : 455: 8 1974-75 Pontiac engine codes decoder reveals the code prefix, engine performance, displacement, and configuration. The date code will be one letter and two or three numbers. The casting number will be 7 numbers. (2=Pontiac, 2=Model Year, P=Pontiac Assembly Plant, 100001=Last six numbers of the car VIN) Sep 23, 2006 · 1969 Engine Codes Code: Application: Displacement: Compression: Horsepower: Transmission: Heads: Camshaft: Carb: MM : 400: 8. 1972-73 Pontiac engine codes decoder reveals the code prefix, engine performance, displacement, and configuration. This code will tell you the year it was to be used. The XX blocks were also used in the W72 400's in '79. 92/1. To answer to visitors questions, here you can find all the pontiac Pontiac 400 428 455 Engine Codes; Pontiac 400 428 455 Engine Casting Numbers; Pontiac Cylinder Head ID Numbers; Year Application Casting Valves CC or CR Notes; 1967: I have most of the years here from 1967 to 1981. I believe there was one engine assembly plant that supplied assembled engines to all the various Pontiac final assembly plants. Feb 27, 2006 · The casting codes from March 1967 on will be found on the rear of the block just behind the number 8 cylinder. All small valve of course. High output Pontiac V8 Cylinder Heads. 5:1: 290: Manual: 15: 66: 2 bbl Horsepower: Cubic Inches: Trans: Code: Compression: Cam: Heads: Carb: Year: 215: 389: M: 02B: 8. Engine HP Rating Head # Valve Size CC or CR; 400: 290HP: 143: 1. Date code must be a 6 no matter how hard I look and it still seems like an 8. for the Pontiac Trans Ams, Firebirds, and Formulas. It should be the end of the VIN code of the car (the panel). 301-400 V8 ENGINE VIN CODES Y. When looking at the engine, at a quick glance, you can notice the difference between the Pontiac 400 and the Olds 403 because the Olds 403 has the oil filler tube located at the front of the engine. There should be three seperate codes. WS: V8-389 2. There is another code that is located along the lid and timing cover. span> 1964-1978 Pontiac Engine Codes. 75" for the 400, compared to 4. Whether the engine is sitting in a car, on a stand, or on the floor, at first glance you will note that all Pontiac blocks have a hydraulic lifter valley pan. WS: V8 All PONTIAC engine codes; 67-69 VIN Codes; All the PONTIAC engines codes from 1955 to 1981 . 42 30 spline Eaton posi street car. To differentiate them it will have to be determined what year the block is. 1959 and earlier blocks, of ANY displacement, did not have this transfer lug. Pontiac Engine Builders; Block codes are were now dated ex. Very interesting. 8:1: 265@4600: 397@2400: n/a: XX: 351: M40: Turbo Hydramatic 3 speed Automatic (Turbo 400) RPO Code UPC Code Type Engine Aug 26, 2020 · Learning how to identify and decode Pontiac engine blocks can save you a ton of money, time, and headaches. Pontiac engine codes Sep 23, 2006 · 1975 Engine Codes Code: Application: Displacement: Compression: Horsepower: Transmission: Heads: Camshaft: Carb: WT : 400: 7. The base engine for a '68 Bonneville is the 340 horse 400 4bbl with small valve ('68 model) 15 heads. Engine Search. Selecting the right block for your 400 build can Nov 10, 2022 · Date code indicates September 29, 1973, which is a 1974 model year. jibf uikps zeeydq niw ieg eled uxav cjjqvj gbuwpg hvdig
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