How to find parts for a Pontiac engine?
FYI: The quick way to find parts on this page is to press the “Ctrl” & “F”keys at the same time and just type into the search engine what you are looking for. This seems to work on all web sites and most documents.
When did Pontiac put displacement callouts on blocks?
Pontiac placed displacement callouts on each side of the block in 1968, and cast the last two digits of the displacement size into the center of the lifter valley. The “00” found on this block indicates that it’s a 400.
When did Pontiac start using common cast connecting rods?
This tends to lessen the amount of side loading placed on the cylinder wall, reducing cylinder wear and overall operational friction. Pontiac introduced its common cast connecting rod in 1963 for 389 applications. The Arma Steel unit was then used in all production engines from 1967 through 1979.
How tall is the connecting rod on a Pontiac short block?
Pontiac’s basic I-beam connecting rod was introduced in 1955. The block’s tall deck height allows the use of a relatively long connecting rod with a center-to-center length of 6.625 inches, which produces a good rod-to-stroke ratio.
Where is the displacement stamp on Pontiac 428 block?
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. There is no displacement stamp for 421, 389 or 326 blocks.
Pontiac placed displacement callouts on each side of the block in 1968, and cast the last two digits of the displacement size into the center of the lifter valley. The “00” found on this block indicates that it’s a 400.
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.
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.