Where is the engine number on a 1969 Pontiac block?
This number, 9792968, denotes a 1969 428. The number is located next to the distributor hole on earlier engines. Non-389/400 engines featured an identification or transfer lug on the rear passenger side of the block. The exceptions to this were the 1961-62 421 Super Duty, and the 1973 455 Super Duty engines.
What does a Pontiac engine block look like?
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. That simply means that the intake is not sealed to the lifter valley, allowing you to remove the intake while the engine remains sealed.
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 is the displacement stamp on a Pontiac engine block?
There is no displacement stamp for 421, 389 or 326 blocks. To further identify the year and application, move to the top and rear of the block, where the distributor is mounted. Here you will find the date code and block casting number.
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.
Are there different versions of the Pontiac 151?
Now Pontiac has made several different versions of the 151 with all sorts of changes over the years which has caused lots and lots of confusion. They built “2”, “5”, “R”, “U”, “E” and “A” code engines (I may have even left out a few).
There is no displacement stamp for 421, 389 or 326 blocks. To further identify the year and application, move to the top and rear of the block, where the distributor is mounted. Here you will find the date code and block casting number.
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.