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The Pontiac 455: A Powerhouse Of Engineering. It must be special I thought. All were stump-pulling torque monsters, but which has the potential to make the most power? The Pontiac brand is well-known for its performance and power, and some of the models that were available with a 455 engine included the GTO, Firebird, Trans Am, Bonneville, Grand Prix, and Catalina. Thanks I'll have to check the 400 out and get exactly what it is, but anyone have an opinion on which I should keep? HP measures the amount of power produced by the engine, whereas BHP measures how much of that power is actually transmitted to the wheels, allowing the car to accelerate. Anyway, me and my pup lived out of that car-literally. When I left home, I traveled the west with my dog working day labor jobs, bouncing from city to city and state to state. However, here are a few of the most common fixes. Pontiac 455s rage . Thanks for the opinions and info guys I appreciate it alot, I think I'll see exactly what the 400 has and what it is and if its good just keep that in the car, since the car is just going to be driven around towns and brought to some shows. Pontiac 400 428 455 Engine Codes; Pontiac 400 428 455 Engine Casting Numbers; Pontiac Cylinder Head ID Numbers; Printable PDF. 2023 FIXD, Inc. All Rights Reserved. Together with the casting code and casting date you can determine what the engine is. Torque is the main factor with these engines, as they are torque monsters and not built for high rpm use. T = 400 4-bbl V8 250 hp (dual exh.) I beat one of thouse LT1 Ram air new trans ams . The 455 engine was a big-block V8 that produced up to 300 horsepower and 400 lb-ft of torque, making it a great option for those who wanted a powerful car. Most of the time, the P0455 code is not serious. Engine Codes - Pontiac Power Net - Your source for Pontiac Muscle Click here to get yours for just $19.99, including a free 14-day trial of FIXD Premium! Enter your information to get the most likely fix for your P0 code and how much it will cost. Are you having trouble identifying the engine in your Pontiac car? It is due to the smaller diameter bearings, which provide less friction, and the smaller main journal bore, which leaves more material in the bulkhead. Pontiac 455 Engine Buildup - MotorTrend: New Cars If the EVAP system has a leak, it wont cause any driveability issues. This article will provide you with some tips on how to identify your Pontiac engine, including what information to look for and where to look for it. The 15 heads are the small valve versions, 1.96 intake valves instead of the casting 64's which are the big valve heads, 2.11 intakes. It cant alert you that somethings wrong if the alert is already on and being ignored. We recommend that you read our article on how to quickly diagnose your check engine light. Pontiac Cylinder Head ID Numbers Patterson Coachworks P0455 Trouble Code - AutoZone Auto Parts The Pontiac 455 has a larger bore size which allows for it to contain a larger volume of air and fuel, resulting in increased power and torque. Pontiac 400 428 455 Engine Casting Numbers - Patterson Coachworks If fuel were leaking out of the tank, you would be at risk. WIP: 1941 Pontiac Two Door Sedan. You may not feel equipped to handle this problem. Popular Engine Codes po420 code po172 code po0171 code po128 code po300 code po456 code po430 code po442 code po455 code po113 code. This code will tell you the year it was to be used. No, Pontiac 455 and 400 blocks are not the same. The engine code provides information about the engine type, size, and manufacturing date. Pontiac engines have block code. 455: 8.4:1: 335: Manual: 197: 68: 4 . VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. Pontiac Engine Codes Bold Typeis for manual transmission Starting in '73,2nd HP # is for Dual Exhaust 326 250 HP YO,YN,XF,YJ,XI 326 285 HP WR,XR,WK,WD 326 285 HP YP,XG,YM,XO 400 255 HP XL,XM 400 260 HP The door can be fitted to any Catalina or Ventura 2-door model.. Learning how to identify and decode Pontiac engine blocks can save you a ton of money, time, and headaches. It had a four-barrel carburetor, dual exhaust, and a higher compression engine and was rated at 280 horsepower (209 kilowatts) from 1963 to 1964, and 285 horsepower (213 kilowatts) from 1965 to 1966. I thought he was going to arrest me or beat me up, but he just told me to find a place to stay or well give you a place to stay. . Everything You Need To Know About GM's Trio Of 455 Cubic - DrivingLine All engine blocks have a casting code. Inspect the purge volume control valve. This models 6.7-liter V8 engine, custom camshaft, EDL-Brock intake manifolds, and custom carburetors all make up its exterior. Put in new leak detection pump $150-$450. Replace it if its worn. These codes are located on the engine itself, or on the vehicles Vehicle Identification Number (VIN) sticker, and can be used to help determine the exact specifications of the engine, such as the type of fuel injection, the type of oil pan and pan gasket, the type of camshaft, and more. Low An EVAP leak isnt normally a big deal because it wont lead to driveability concerns. If the EVAP system does not maintain the pressure, the ECM recognizes an evaporative emission control leak. However, these codes were used for more than one year and could have different machining or even different main caps. You can use these like puzzle pieces to narrow down what area of the system might be to blame. All Rights Reserved. The P0455 trouble code is caused by anything that would lead to a leak in the evaporative emission control (EVAP) system. Judges didnt get trim rings. We'll help you figure out what's causing this. P0455 Code - Mechanic Base - Auto Repair Advice From Real Experts However, the ECM occasionally performs leak tests to ensure the evaporative emission control system is working properly when the vehicle is turned off. Most often, one of these problems is the culprit. If at this point the vehicle is still setting the same code, you may have an electrical problem and will need to bring it to a shop to have further diagnostic work performed. (Buyers Guide), USAA Car Loan: Rates for New and Used Cars (2023 Guide), Understanding JG Wentworth Personal Loan Reviews, how to quickly diagnose your check engine light, Best & Worst Years of Chevrolet Traverse Graphs & Owner Surveys, Best & Worst Years of Toyota 4Runner Graphs & Owner Surveys, Best & Worst Years of GMC Acadia Graphs & Owner Surveys, Best & Worst Years of Ford Escape Graphs & Owner Surveys, Best & Worst Years of Jeep Wrangler Graphs & Owner Surveys, Best & Worst Years of Buick Enclave Graphs & Owner Surveys, Best & Worst Years of Jeep Grand Cherokee- Graphs & Owner Surveys, Missing, defective, damaged, or loose gas cap (*most Common), Faulty or stuck EVAP purge volume control valve. Save my name, email, and website in this browser for the next time I comment. Although the engine was widely acclaimed for its performance and power, it wasnt the only one. The 320 HO (High Output) was the higher-output model. As a result of this move, Pontiac gained a reputation as one of the most successful muscle car manufacturers, and their showrooms remained busy with customers eager to purchase the best muscle cars on the market. This number can help you determine the year, displacement, and other features of the engine block. "Regular" 455 engines had a Y code in 1973 and 1974. The 400 in the car now has pistons with a comp. Both engines have unique characteristics that make them suitable for different applications. The first digit of the code indicates Manual or Automatic transmission. Engine Unit Number The vent control valve is normally opened when the engine is on, and the purge volume control valve is normally closed and is controlled by the ECM to open when it is ready to purge the stored fuel vapors from the charcoal canister. > Click here to get FIXD for $19.99 for a limited time! Pontiac engine blocks are an important part of any Pontiac vehicle. The fuel vapors from the fuel tank are absorbed and stored by charcoal pellets in the charcoal canister. With a penchant for underground music from the 1960-70s, Diego and his family reside in the Southwest. An option for this car was a Pontiac 389 that had been bored to 4.09375 inches and stroked to 4 inches, as well as having larger 3.25-inch journals in the crank. Knowing the unit number of your engine can be a great help when ordering parts or performing maintenance on the engine. Pontiac Trans Am SD-455: Did Pontiac Save its Best Muscle - MotorTrend Check to see if you see any smoke leaking out from any hoses or seals. First, you want to run through a diagnostic check to see whats causing the problem. The block casting number, 9790071, is for a 1968-1969 400 engine. 1972 Engine Codes - Ron's Pontiac Page You have PHS for it? A Bugatti Chiron SS is followed by a Koenigsegg Regera with 1,479hp, and a McLaren SLR McLaren is rounded out the list. The 455 High Output engine had improved cylinder heads as well as better intake and exhaust ports while the Super Duty, made in 1973, was able to produce 290 horsepower in spite of more strict emissions standards. When theres a leak in the EVAP system, you probably wont notice any strange symptoms. For a street engine, I would keep the 455, if the engine is in good shape. If it is a 70 block then it should be a four bolt main as 70 was the only year that Pontiac produced the 455 with four bolt main journals. The 15 heads are the small valve versions, 1.96 intake valves instead of the casting 64's which are the big valve heads, 2.11 intakes. Pontiac V8 Cylinder Heads - Casting numbers and Specs - WOW Muscle Cars The Pontiac engine unit number is an important identifier for your Pontiac engine. 2023 FIXD, Inc. All Rights Reserved.Exclusive Member of Mediavine Home. Lifelong automotive enthusiast with a soft spot for offroading. (2)403 engine 19 67 ENGINE CODES Pontiac 400: WI, WQ, WU, WZ (manual), YT, XN (automatic) 1968 ENGINE CODES Pontiac 400: WZ (manual), YT (automatic) Pontiac 400 HO: WQ (Manual), YW (automatic) Pontiac 400 Ram Air: XN, XT (automatic), WU, WI (manual) 1969 ENGINE CODES Pontiac 400: WZ (manual), YT (automatic) Read what he has written and follow his and other builders recommandations. Y = 455 4-bbl V8 250 hp (dual exh.) . This is one of the cheapest repairs you can make, so its worth trying. Diagnosis can require some specialized equipment beyond what the FIXD Sensor can provide, but this is usually still a beginner-level diagnosis. Despite the fact that the beast of a Pontiac engine has street-based limitations, it was able to produce 561 horsepower with just the pump of gas an impressive feat. Rodders and street enthusiasts have also loved the 400 because of its size, power, and durability. Its also possible that you forgot to tighten the gas cap properly, or that you let your vehicle run while refueling, which could cause the P0455 code to appear. Speaking of diagnostics, the steps to handle the P0455 code are simple. Pontiac Block Identification Numbers. The Pietro Astra V8 engine has a cast-iron block and head, as well as two valves per cylinder. Its important to evaluate all trouble codes in a bunch. They throw me out of the track for all most knocking down the starting tree . Dedicated to bringing you the best High Performance Pontiac parts and accessories available on the market! Additionally, Pontiac enthusiasts may find the unit number useful for tracking engine production numbers or for verifying the authenticity of an engine. When it comes to making repairs associated with the P0455 code, one or more of the below repairs may be needed to solve the underlying issue. Pontiac engine blocks are typically made from high-strength aluminum or cast iron and are designed for increased longevity and reliability. The only time you would need to worry is if the leak is in the fuel tank. Thanks. This engine has a top speed of 373 horsepower, two four-barrel carburetors, a solid-lifter camshaft, and high-capacity aluminum exhaust manifolds. For a 455 a 3.73's are just a little too much gear. Dream car: tie between a 71 Hemi Cuda and a 91 GMC Syclone. In those days all these states had govt run day labor places where you could go in the morning, they would call out the job, and you would raise your hand if it was something you were interested in and the employer would pay you at the end of the day. What are you looking for? It is only available in a heavy-duty driveline component with a related 421 engine. How To Interpret The 1969 Pontiac 428 HO Engine Codes Do repairs yourself and save $1000s. The Pontiac V8 engine is one of General Motors family of 90 V8 overhead valve engines manufactured from 1955 to 1981. If our directions contradict what you read in the service manual, you should follow the advice from the manufacturer. To boost power, it employs a set of JE Pistons and an MSD ignition system. Thanks alot for the help guys I appreciate it alot.

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