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If you mean the difference between the Pontiac 400 and 455....the differences are the bore size, the crank stroke length, and the main bearing journals. All are bigger on the 455. However, there is also a small block Chevy 400....which has nothing the same as the other two. The Pontiac 400 has a bore of 4.12, stroke 3.75 and 3" main journals. The 455 has a bore of 4.151, stroke of 4.21, and 3.25" main journals.
What else can I help you with?
Is a Pontiac a small block?
Depends on which Pontiac engine you are referring to. Any GM engine 400 cubic inches and under are considered a small block with two exceptions. The 396 is a big block and there were certain 400's that are big blocks. Two versions of the 400 were built.WRONG. All Pontiacs from 326-455 are the same size block externally. The only major difference is that the 326, 350, 389, and 400 have a 3" main bearing size. The 421, 428, and 455 are 3.25" mains. Now...if you are talking about comparing a Pontiac block to say a Chevy block....the Pontiac is larger than a small block and slightly smaller than a big block.
What GM engine has a casting 3951609?
Couldn't find that number at Mortec, but 3951509 is a 400. hth
What year is 330817 Chevy 400 engine?
70s
How do you Replace a rear main oil seal on a gm 455 engine?
To replace the rear main oil seal on a GM 455 engine, first, disconnect the battery and remove the transmission to access the rear of the engine. Next, remove the oil pan and the old seal, taking care to clean the sealing surfaces. Install the new seal, ensuring it’s seated properly, then reassemble the oil pan and transmission, and reconnect the battery. Finally, check for leaks by starting the engine and monitoring the area around the seal.
What is the weight of a GM zz4 crate engine?
shiping weight is 400, so probaly 370 without packaging materiels
How many different Chevrolet v8 engine sizes are there?
alot 283 , 302, 305, , 327, 350, 400 Pontiac which is still gm had 301 and 455 big block...........Chevy LS series motors are the best all aluminum.....STOCK roller motors and what not multiport fuel injection bolt on power mods that are stock on corvetts for ls1 and 2 motors easy power by ordering a gm part
What is the difference between the 3800 series 2 and 3800 series 3 gm engine?
About 20hp.
Was the 428 engine available on the 1969 GTO?
The most popular engine was the 400. However, in those days, you didn't have to buy a cookie cutter car like you do now. You could pick and choose just about any option you desired. So I am sure there are '69 428 equipped GTOs out there. GM had a self imposed 400 ci limit for intermediates. It was lifted in 1970 and they started to use the 455. Prior to 1970 the 428 was only used in full size models.
What is the difference between a Ls1 and a Z28?
LS1 is a GM engine, Z/28 is (was) an option package on Camaros.
How much does a gm 3400 engine weigh?
The GM 3400 engine typically weighs around 350 to 400 pounds, depending on specific configurations and components. This weight includes the engine block, cylinder heads, and other essential parts but may vary slightly based on additional accessories or modifications.
Can a olds 400 trans fit a 350 Chevy engine?
Chevrolet's used a different bolt pattern from other GM's. An adapter would be required.
What is Code of engine at VIN for gm?
In GM trucks or new GM cars, the 8th digit of the VIN # is the Engine.
