Where is the casting code on a Pontiac V8?
The Engine Unit Number is located under the passenger-side cylinder head just above the Engine Code. It is 6 or 7 digits long and represents the sequential production number of the engine. 1955 to 1963 Casting code is located on the passenger side of the block. 1964 to 1967 Located on the back of the engine near the Distributor.
When was the first Pontiac engine block cast?
For example, a block stamped “J129” was cast October 12, 1959, 1969, or 1979. Armed with the previous clues, you can pin the year down. If the block is stamped with a 350, 400, or 455, it was likely cast in 1969, because GM (as discussed) started stamping the displacement on the block for the 1970 model year.
Where do you find the number 428 on Pontiac engine blocks?
As you look there you may find a pretty simple clue that will end your engine identifying search. On 1968–69 428 blocks you will find “428” stamped between the freeze plugs. On blocks produced in 1970 and after, you will find 350, 400, or 455 stamped towards the left side of the front of the block.
What do the casting numbers on engine blocks mean?
All engine blocks have a casting code. The codes below will tell you the year during which a specifc casting number was used.In some cases the same casting number is used across various years and have different characteristics like the number of bolts on the mains cap.
Where do you find the block casting number on a Pontiac?
Here you will find the date code and block casting number. The date code is a three- or four-digit code that always starts with a letter, which represents the month the block was cast (A = January, B = February, C = March, and so on through L = December). It should be noted that for the 1967 model year, Pontiac used M for December.
How to identify Pontiac V-8 engine blocks?
Pontiac blocks are interesting power plants that are often misunderstood and improperly identified by sellers and buyers alike. The blocks of all Pontiac V-8s from the 287 to the 455 are the same size and very close to the same weight, which can make it more difficult to identify the 11 different engine displacements produced from 1955–79.
What kind of engine block is a 1970 Pontiac?
If the block is stamped with a 350, 400, or 455, it was likely cast in 1969, because GM (as discussed) started stamping the displacement on the block for the 1970 model year. Also, all blocks cast in 1969 and later have the last two digits of the year here as well. So if you see “70” stamped in this area, the block is a 1970.