Olds 394 engine identification. I got the motor and trans from a buddy of mine .

Olds 394 engine identification It was an attempt to assemble various Olds knowledge, however flawed it may have been. Some components like engine blocks and Mar 30, 2020 · There's a shop in Niles, Ohio that the Father was a Guru with the 394/371/324/303 early Oldsmobile engines. Other components such as alternators and carbs have stamped numbers. Four barrel carbureted 394 engines were painted red, and two barrel 394 engines were painted green. General Information Note: The information contained in all of the "Engine Detail" sections should be read before proceeding with modifications, etc. Some have an additional letter (an A or B), about 1" high, right next to the letter (or number). 5:1 version was also produced for the Starfire and Police engines with 345 hp. The 4 1/8 indicates a 4 1/8" (4. The number "4 1/8" follows casting number. All used shaft mounted rockers. A note about Oldsmobile casting dates: Oldsmobiles use Julian date codes. Ensuring matching engine and Year ID/ Casting Used Code Number Application 568677 LH; 371 CID. For example, the Buick, Chevy, Olds, and Pontiac 350s are all totally different, using different bore/stroke dimensions, different block and head castings, and different reciprocating parts. Super 88's with Rocket V-8s won many races in 1949 and through the 1950's. The 394 V8 was used in the following vehicles: 1959-1960 Oldsmobile Super 88, 315 hp and 435 lbs. Watch as John Edwards @ Costa Mesa R&D Automotive Machine Shop takes you thru the steps to reface a set of rocker arms for a 394 Oldsmobile engine. Head #561557. 394 cubic inch. 1957 and later cylinder heads Aug 22, 2004 · Can anyone tell me year, CID, etc. Americas Largest Supplier of Harmonic BalancersWe Have The Right Harmonic Balancers For You We are America's Largest Supplier of Harmonic Balancers Jul 22, 2007 · In my '67 Cutlass is a 350 ci bronze wide block. It's also a place to sell your parts and post wanted for 303-394 engines. The year 1949 marked the return of Oldsmobile V8s with the famous “Rocket” engine. Jul 31, 2014 · OK, don't laugh but the 50's are not my era of expertise. I'm sure there are Olds fans on Engine number 585786-4 1/8. The Block casting number is 561747. 1966-71 L6 (Chevrolet) engine codes are found on the right side of the engine block just to the rear of the distributor. 400, 425's. Thank you. Aug 4, 2025 · This upped power to 330 hp and 440 lbs. The head code helps verify the engine year and model, while the bellhousing number confirms transmission compatibility. 98. 5l) engine on this 1962 Oldsmobile Ninety Eight. This is the quickest, easiest way to get the most information about the engine. Engines / 1964-1988 260-455 V8 / General Information / Identfication / Identifying Oldsmobile 330-455 CID Rocket Cylinder Heads In 1964 Oldsmobile introduced its newly designed 330 C. For over 25 years we witnessed the 330 evolve into many Oldsmobile v8 engime casting numbers 260, 307, 330, 350, 403, 400, 425, 455 information. That's a plus ! But what I'm trying to figure out is if this motor is a high compression 394 or a low compression 394 ? I know the motor has been gone threw at one point it does have a 4 barrel Identification On 1959-1963 engines, the 371 has gold valve covers, and the 394 has green valve covers. The number are about ¾" high, and oriented to the right (passenger) side. For accurate restoration, cross-reference these numbers with official Oldsmobile parts catalogs. Easy to spot by the 3 carb holes. Oldsmobile FAQ 394 CID Engine Detail. 345hp/440 lb-ft torque. any help will be greatly appreciated, thank you Apr 20, 2015 · Taking the lazy way out, what is the easiest way of identifying whether you have a 303-371 or 394 engine? Just not my era of expertise! Feb 18, 2021 · The 394 continued until 1964, for 1965 Olds got an entirely new engine, a 425 that grew into the 455. These guys are the best builders around! -- This is a group dedicated to the rebuilding, hot rodding, restoring and fond memories or pictures of the 303-394 Oldsmobile engine family. 5" wide. Nov 21, 2024 · Need help to identify these heads . The Rocket, along with the 1949 Cadillac V8, were the first post-war OHV crossflow cylinder head V8 engines produced by General Motors. 1960-75 Oldsmobile engine code decoder reveals the stamp location, engine displacement, horse power, compression ratio, and Carburetor configuration. See photo - all I can find is a timing pointer and three slots on the crank pulley, but have no idea what those slots mean. Things like bearings OLDSMOBILE BLOCK CASTING NUMBERS Blocks 1949 - 1964 The casting number is located at the rear of the bell housing. . Nov 4, 2015 · Home / Technical Info / Oldsmobile / 01. Submit corrections and additions to this information to Get the best deals for Oldsmobile 394 Complete Engine at eBay. Any quick way to tell. Unlike Chevy, which uses actual dates (like 3 C 69, for March 3, 1969), Olds will cast 62 for the 62nd say of the year. This combination is Mar 7, 2005 · Custom Rodder had an article about early Olds motor (build-up) a few years ago by Doc Fromhader All heads bolt to all blocks, but port size and/or deck height may cause problems, as may valve to cylinder wall clearance (like 394 head on 303), but use appropriate head gasket for the head or you will have oiling problems. He even has aluminium heads for them, large lifters, etc. About the only things common among these four motors are the distributor cap and the carb bolt pattern (assuming a Q-jet - the Holley used on some Chevy motors is obviously different). Cranks 1949 - 1964 Identification All crankshafts of this period are forged. Their problems included: a high-pressure design that made them prone to leaking, huge jumps between gear ranges, and were designed The "Magic Potion" a few years ago didn't work, so I decided to go for broke and pull this apart and see how bad it was. May 30, 2008 · Could you tell me how i can tell that i have a 1955 engine in my 1955 98 holiday the engine serial number which is supposed to be stamped on left hand cylinder block is not th Take a look at this sweet Oldsmobile 394 CID from S&J Engines. Quick ID tip: pre-71 engines had heads with casting ID "F" or earlier at the lower left corner of the head. Full-size engine unit starting numbers begin at 300001. ft of When cars are assembled nearly all components have numbers to identify them. If you cannot prime engine, then you need to fill all oil galleys with a tank filled with oil mounted to the oil pressure switch hole. …more Oldsmobile V-8 History Rocket Era 1949 - 1990 Generations First Year Items Indy Pace Cars Engines 1949 - 1964 What CIDs Differences & Similarities Varieties of the Early Rocket 303 Detail - 324 Detail - 371 Detail - 394 Detail Engine Performance 1964 - 1990 Big Block CIDs Small Block CIDs Is it a Big Block or Small Block ('64 - '90) Engine Differences & Similarities: Olds BB and SB Varieties Sep 1, 2010 · Please check this info. [ Thanks to Scott Clark for this information. Detailed Listing Intake manifolds are cast iron unless otherwise noted. com. This is a rare single year high performance engine built by Oldsmobile. May 16, 2006 · The blocks are too different from each other to have the same casting number for all years '59-64. 5" high indicates a big block, while a number indicates a small block. Identification The ID/Code is located on the top of the left center exhaust port on each head. I can't find any casting number charts for Oldsmobile . The cast-in ID consists of a letter or number, usually found in the depression just behind the thermostat's Oldsmobile Engine Decoder 1964-65 V6 (Buick) engines, the engine codes are found on the right-hand cylinder head. Can The bellhousing number 585786-4-1/8 and head stamp H677523L indicate specific casting and manufacturing details for the 1963 Super 88 engine. Feb 26, 2016 · Hey you guys, I have a 62 Olds 394 that I'm gonna put in my 56 olds 4 door sedan . 568926 RH; 371 CID. The first V-8s in this new-style Oldsmobile engine line started as the 330-ci models for the small-block family and the 400- and 425-ci models for the big-block family. Granted it mostly pertains to the mid 60's engines never the less if you look at your 303-324-371-394 you will see similarities in how GM machined these blocks. One is Dec 19, 2006 · Here goes, I have just got an Olds Engine and trans combo. The Rocket designation comes from the general design of these engines, not the HP rating. This is my Olds 394 engine I just rebuilt and I'm also converting it to a 4 speed Jul 28, 2023 · Hi, brand new to the site, however I'm hoping that someone on here is an Olds expert and can sort out an issue that I have. For originality and number matching authentication Jan 1, 2009 · Check out these V8 Oldsmobile engines that are still used throught the world of Hot Rodding and used to be used in the world of NASCAR inside Street Rodder Magazine. 5:1 compression. Identification On 1959-1963 engines, the 371 has gold valve covers, and the 394 has green valve covers. Small Block Blocks 1964 - 1990 Facing the front of the engine, at the top surface of the timing chain area, to Identification On 1959-1963 engines, the 371 has gold valve covers, and the 394 has green valve covers. Hoping someone will know the answer. This code has a letter designating the plant (Flint = F), a production date code Identification Scrape the oily goo off and read the letter at the lower left corner of the head, near the #1 or #8 spark plug hole, a letter about 1. May 31, 2008 · I have looking on the internet for like 2 hours for some dang early oldsmobile casting numbers of the block. Yes, I know I can find the engine numbers but being a bit lazy here. ID/ Casting Code Number Year(s) Application/Notes 571145 '57,'58 371, Tri-carb, 3 2bbl. It could've come from any full-sized Olds of that time period, a good, torquey, reliable motor most often backed by the Roto-Hydramatic (Slim Jim) transmission. 2:1 at best. I got the motor and trans from a buddy of mine . Big block casting numbers are as follows: 386525 A -- 1965 425 389298 B -- 1965 400 (short stroke) 389244 D There are tons more # all over the engine including manifolds, cams, intake, crank but here are the basics. The Rocket V-8 has been credited with starting the quest for more power and hot rodding. Identification The 'Number=SB, Letter=BB' coding extends to intakes, too. Mechanical linkage. Timing Chain Covers Major differences are the timing chain covers. 10. Note this doc may contain errors. ” The company produced its first V8 – an L-head design – in the years 1916-1923. The small blocks (260, 307, 330, 350, 403) use an intake about 12. engine. Jul 6, 2006 · That would be a 394 Olds block, built between 1959 and 1964. All Oldsmobile V8s were assembled at plants in Lansing, Michigan, while the engine block and cylinder heads were cast at Saginaw Metal Casting Operations. I have looked high and low for information leading to the true identity and source of the current plant, and have come up with tons of very confusing and sometime conflicting information. Identification The early Olds V-8s used a "raised" intake manifold design with a separate valley cover. Block #R174324. Some things were taken out of context and applied to other years of the same model, etc. I cant seem to find any of the early castings of the olds rockets 1949-1964 for the 303-324-371-394 engines. Strengthening/Machining Cranks 1964 - 1990 Identification There are about seven types of cranks: Early series big block, short stroke, all forged. It will look like a plate with the date was screwed into the mold for the manifolds. This code has a 2-letter prefix code followed by a 3-digit production code. ft. One is A LOOK AT THE OLDS V8'S THROUGH THE YEARS Dec 27, 2008 · Olds / Oldsmobile 394 "ultra"engine ID Discussion in ' The Hokey Ass Message Board ' started by BROCK ART STUDIO, Dec 27, 2008. Casting numbers are part of the component and are raised above the surface. As for the original question, on the top of the bellhousing, a 394 will have "4-1/8" cast on to indicate the bore size of a 394. This could easily be changed though. The casting number is located at the rear of the bell housing. with a known Olds expert before ordering expensive parts or having labor done on your block, and good luck!!" If there's any original paint on it, green would be the '54-'56 324 cid engine, the '57-'58 371, w/gold paint. In 1995, the Jun 21, 2007 · Olds Motor Id Discussion in ' The Hokey Ass Message Board ' started by BigChief, Jun 21, 2007. 394 Oldsmobile Engine Specs Please do not purchase if you are not able to pay cash and pick up locally. the heads are number 16. thanks, Ida Red Jan 10, 2019 · mgtstumpy Member from Brisbane Australia The engine number will identify it as well as casting numbers Flywheels: Oldsmobile 1949 - 1953 (303) - 145 teeth Oldsmobile 1954 - 1960 (324 + 371) - 176 teeth Oldsmobile 1961 - 1964 (late 371 + 394) - 176 teeth 303 and 324s are internally balanced, external balancing started with the 371 in 1957. Usually, the big ID [not the 6-digit ¼" tall all-number ID] letter or number will be found near the front, often down in between the front fuel/air runner and the front water passage which contains the thermostat. If anybody wants to know any other codes, let me Engine Number - The Rocket engine unit number on full-size models is stamped on a pad on the left (driver's side) cylinder head, directly beneath the rocker arm cover lip, in between the 3rd and 5th spark plugs. Date codes, casting numbers and manufacturing plant locations. The 330 was much lighter than the 394 and more powerful than the 215 F-85 V-6 power plant it replaced. , because some information that applies to all engines, or all small blocks or all big blocks, might not be duplicated in every section. can anyone out there help me out maybe a website I googled it and all I find are these half ass incomplete listings. The engine-block designs remained virtually unchanged right up to the last Olds engine […] Like all other GM divisions, Olds continued building its own V8 engine family for decades, adopting the corporate Chevrolet 350 small-block and Cadillac Northstar engine only in the 1990s. The FAQ was built off several email newsgroups and other places on the web many years ago. I just got a race car yesterday that was advertised as a 394 but I think it is a 303 or a 324. 573388 '5? D2 580676 '61 394 Jul 10, 2012 · 7&7 wrote: If you look on Mondello's web site you will see a lot of interesting info on Oldsmobile oiling. Oldsmobile FAQ Crankshafts section. That will tell you what it is. The engine had excessive oil consumption and blue smoke, but otherwi Oldsmobile FAQ 394 CID Engine Detail. Casting Year(s) CID Number Color '49 - '53 303 555614 Green '54 - '56 324 568922 Green '57 - '58 371 '59 - '60 371 Jan 15, 2006 · The engine casting number is 574534 - 4 1/8The head casting number is 573305The cylinder head is P9169654I am rebuilding and need to identify the year for ordering parts. All you will see is a number cast into the part from 1 to 365. 1960 573325 LH; 394 CID. Details Dual Exhaust Manifolds At least for 371 dual exhaust manifolds, the only thing that made them dual exhuast was a factory cast block off for the right side manifold. All full-size model engines have a displacement of 394 cubic inches. ID/ Casting Code Year(s) CID CCs Number Notes 10 1949 10 1956 16 1957 371 18 195? 20 394 23 1964 394 Seen on 394. 324s were popular hot rodding engines, the 371s/394s were popular race Classic Recollections: 1964 Oldsmobile Ninety Eight Ukraine BROKE Russia at Pokrovsk Putin's BIGGEST Defeat 1962 Oldsmobile 394 Engine and Transmission Removal for Overhaul Dec 21, 2006 · This one has me stumped: someone asked me: <div class="ubbcode-block"><div class="ubbcode-header">Quote:</div><div class="ubbcode-body"> Hello there I am wondering if you could help me I am trying to find out the year of the engine my father purchased. Nov 16, 2021 · Oldsmobile engine blocks, as far as most Olds enthusiasts are concerned, started in 1965. for the following Oldsmobile casting numbers. The later V-8 intake seals directly to the block. The stampings are made by pressing into the component after the part is made. A major change in design and engineering of Oldsmobile V8s took place in 1964. You'll find the block casting number. A special 1963 10. Jun 15, 2017 · Oldsmobile V8s can be grouped into five “generations. This was the same family as the 330 that debuted in 64 and later became the 350. We have a great online selection at the lowest prices with Fast & Free shipping on many items! Jul 1, 2008 · Look at the small shelf where the oil fill tube mounts. Detailed Listing Intake, Exhaust Port Sizes 1954 and 1955 324s' have smaller intake ports and valves than the 1956 engines. One leg much longer than the other, one corner, one leg We're rebuilding the original 394ci (6. The last two-valves-per-cylinder overhead valve Oldsmobile V8 came in 1990. The big block Olds motors (400, 425, and 455) use an intake that's about 14" wide. 125") bore, which makes it a 394. Engines with G, Ga, or J heads were low compression- about 8. I. the stamp on the left side between 5&7 is 7R239123. Any help would be greatly appreciated. Example: manifolds and rear ends have casting numbers. The trans is a th350 that has been made to fit a early olds engine. As we should know, the 350 was introduced in 1968. It may even be All Olds V-8 pushrod engines produced between 1949 and 1990 are considered Rocket engines. They have an "L" or "check mark" shaped notch on the drive flange. Apr 14, 2019 · '59 - '60 371 Gold 394 Green '60 394 578135-4 1/8 '61 - '63 371 Gold 394 Lo comp: Green, Hi Comp: Red '64 394 585786 This specific casting number seen on an "Ultra-High Compression" engine. I just bought a 39 Ford with a 394 Olds in it and am trying to work out how to check the timing. 949-631-6 Nov 6, 2015 · Q: Can you tell me what would be involved in putting a turbo 400 trans behind a 1963 olds 394 cubic inch motor? A: Most ‘63 Oldsmobile 394ci engines were backed up by the Roto Hydramatic Transmission, a lightweight transmission also known as the “Slim Jim”. ydohs uuggmm uqvbmw klojenq kahkty iev nyi qcji rdt zeib gkcbjd kqsf wlvbgye gsut uujbv